A reconfigurable optical add/drop multiplexer using a wavelength selective switch (WSS) component to multiplex wavelength channels into a wavelength division multiplexed (WDM) signal. When a given channel is dropped, an amplified spontaneous emission (ASE) injection signal is multiplexed as a ghost channel into the WDM signal. The ASE injection channel can mitigate polarization hole burning and can provide a fuller power spectrum density. However, the ASE injection channel also defines a monitoring window. As an optical channel monitor (OCM) monitors the WDM signal, the OCM can detect, within the monitoring window, any underlying characteristic of the given wavelength channel. In this instance in response to the detected characteristic, the WSS component switches from multiplexing the ghost channel into the WDM signal to multiplexing the given wavelength channel into the WDM signal.
A vertical cavity surface emitting laser (VCSEL) array fabricated to produce multiple wavelengths. A first distributed Bragg reflector (DBR) is formed on a substrate, and an optical cavity having an active region and a cavity layer is formed on the first DBR, and a second DBR is formed on the optical cavity. The cavity layer is selectively etched to form wavelength-specific regions having different filling factors. As a result, the wavelength-specific regions have different optical thicknesses (e.g., different refractive indexes and/or physical thicknesses) and generate different Fabry Perot wavelengths.
H01S 5/02 - Structural details or components not essential to laser action
H01S 5/183 - Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
H01S 5/40 - Arrangement of two or more semiconductor lasers, not provided for in groups
3.
Device and Method for Optical Coherence Tomography In Laser Material Processing
A device for monitoring a process in laser material processing, comprising a laser generating a light beam, wherein the light beam may impinge on a lens matrix disposed between the light source and a beam splitter. The lens matrix may comprise microlenses, operable to generate a matrix of light beams from the impinging light beam. Part of the matrix of light beams may be directed to a mirror in a reference arm and part may be directed to an unknown surface in a measuring arm. The reflection of these beams may be used to generate an interference signal to be evaluated.
This disclosure describes a method of forming a VCSEL with a structural birefringent cavity. This method comprises growing a bottom distributed Bragg reflector (DBR) and a first part of a cavity on a substrate to form a bottom structure comprising a plurality of layers. One or more anisotropic features are etched on a upper layer of the bottom structure to produce a patterned growth interface. A remaining part of the cavity and a top DBR on the patterned growth interface are overgrown to form an epitaxial structure. One or more oxide apertures are formed in the epitaxial structure.
H01S 5/183 - Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
H01S 5/34 - Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers
An optical isolator includes a polarizer for receiving and passing an optical signal received from an optical signal source to a garnet which rotates a polarization of the optical signal by an angle of 45°−θ1°, where 5°≤θ1°<42°, and outputs at least a part of this polarization rotated optical signal to an analyzer, having a polarization optical axis at 45°+θ2°, where 5°≤θ2°<42°. The analyzer outputs at least a part of the polarization rotated optical signal to an external optical circuit which reflects at least a part of the polarization rotated optical signal back to the garnet via the analyzer. The garnet rotates a polarization of the reflected optical signal by an angle of 45°−θ1° and outputs this latter polarization rotated optical signal to the polarizer which at least partially blocks it from the optical signal source.
In one example, an optoelectronic module may include a stack assembly including an electrical integrated circuit and an optical integrated circuit electrically and mechanically coupled to one another, an interposer electrically and mechanically coupled to the stack assembly, and an optical connector to optically couple the optical integrated circuit with an array of optical fibers.
A methodology is presented for using neural network (NN) techniques to evaluate input data presented to a computer-controlled processing system. An initial evaluation is used to determine if the input data represents a valid product that is intended to be processed by one or more algorithms within the computer system. If the input data is determined to be invalid, the operation of the algorithm on the product is not initiated (or halted if previously started). Presuming a valid input is ascertained by the NN-based evaluation system, further classification and identifications may be performed to properly match the presented data with a particular system process, as well as select an optimum algorithm for preforming a given task from a set of possible algorithms that may be used for that task.
A system for providing advanced characterization of an optical fiber span is based upon the use of a pair of optical time domain reflectometers (OTDRs), located at opposing end terminations of the span being characterized. Each OTDR performs standard reflectometry measurements and transmits the resulting OTDR trace to monitoring equipment in a typical manner. The pair of OTDR traces is thereafter combined in a particular manner (“stitched together”) to create an OTDR trace of the entire fiber span (essentially doubling the operational range of prior art OTDR measurement capabilities). The transmit portion of one OTDR may be paired with the receive portion of the other OTDR, with time-of-light measurements (or signal loss measurements) used to determine optical path length and/or optical signal loss of the span. Using a multi-wavelength light source in the paired transmit/receive arrangement allows for a characterization of chromatic dispersion of the span.
G01M 11/00 - Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
H04B 10/071 - Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
A modular assembly for opto-electronic systems has a substrate on which various photonic integrated circuit (PIC) chips and electronic integrated circuit (EIC) chips are mounted. One or more waveguide (WG) chips mounted on the substrate align the optical communication between the PIC chips and fiber blocks for optical fibers. Preconfigured electrical connections in the substrate allow the PIC and EIC chips to communicate with one another and to communicate with solder bumps on the substrate for integration of the modular assembly with other electronic components.
A grid is manufactured with a combination of ion implant and epitaxy growth. The grid structure is made in a SiC semiconductor material with the steps of a) providing a substrate comprising a doped semiconductor SiC material, said substrate comprising a first layer (n1), b) by epitaxial growth adding at least one doped semiconductor SiC material to form separated second regions (p2) on the first layer (n1), if necessary with aid of removing parts of the added semiconductor material to form separated second regions (p2) on the first layer (n1), and c) by ion implantation at least once at a stage selected from the group consisting of directly after step a), and directly after step b); implanting ions in the first layer (n1) to form first regions (p1). It is possible to manufacture a grid with rounded corners as well as an upper part with a high doping level. It is possible to manufacture a component with efficient voltage blocking, high current conduction, low total resistance, high surge current capability, and fast switching.
A double-sided coating may include a substrate having a first side and an opposing second side, a first coating forming a first electrode arranged on the first side, and a second coating forming a second electrode arranged on the second side. Each of the first coating and the second coating have a thickness of at least 30 μm and a surface roughness (Ra) of less than 10 μm and are formed from a slurry including a liquid carrier suspending solid particles. The slurry includes a binder, an active material, and a conductive material.
H01M 10/0585 - Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
In one example, an optoelectronic assembly may include a laser array, an amplifier array, and a multimode interference coupler optically coupling the laser array and the amplifier array. The laser array may include at least one primary laser and at least one spare laser configured to be activated if the primary laser fails. The amplifier array may include at least two amplifiers configured to amplify optical signals received from the laser array.
A laser processing head conducts laser energy to process a workpiece. A fiber input emits the laser energy, and internal optics focus the laser energy as a laser beam to a focus spot relative to an output on the head. A relay between the fiber input and the internal optics directs a portion of process light, which has returned from the process through the internal optics to the relay. The effects of the internal optics form the returned process light as a hollow converging cone toward the fiber input. The relay is located in an angular space situated an extent outside the diverging cone of the emitted laser energy from the fiber input, such as at a numerical aperture that is about 10 percent greater than the numerical aperture of the fiber input. A sensor detects the portion of the process light directed to it.
An alloy product is produced by an aluminothermic reduction process and an alloying process with one or more other metals or master alloy, where the reduction process and the alloying process are performed in a single stage. The final alloy product may have a scandium concentration that is greater than 0% and less than about 2%. According to another aspect of the present disclosure, a first melt is produced at a first melt temperature, a melting and alloying step is performed at a second melt temperature, less than the first melt temperature, and the temperature of the first melt is not substantially less than the second melt temperature before the melting and alloying step.
C22C 1/057 - Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor with in situ formation of phases other than hard compounds by solid state reaction sintering, e.g. metal phase formed by reduction reaction
17.
METHODS AND DEVICES FOR LASER BEAM PARAMETERS SENSING AND CONTROL WITH FIBER-TIP INTEGRATED SYSTEMS
A sensing method for in-situ non-perturbing measurement of characteristics of laser beams at the exit of the laser beam delivery fiber tips include measuring power of a laser beam transmitted through delivery fiber tip in fiber-optics systems. A sensing devices for in-situ non-perturbing sensing and control of multiple characteristics of laser light transmitted through light delivery fiber tips includes a fiber-tip coupler comprised of a shell with enclosed delivery fiber having a specially designed angle-cleaved endcap and one or several tap fibers that are specially arranged and assembled at back side of the endcap and other variations. Methods and system architectures for in-situ non-perturbing control of characteristics of laser beams at the exit of the laser beam delivery fiber tips include fiber-tip couplers and sensing modules that receive laser light from tap fibers, and systems for optical processing to enhance light characteristics suitable for in-situ measurement.
H01S 3/10 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
The disclosure relates to a system and a method for monitoring the state of optical elements of a device for laser material processing. According to the present disclosure a detailed monitoring of the state of optical elements of a device for laser material processing takes place by monitoring properties of laser radiation in the direction of an optical fiber or laser radiation entering a laser processing head connected to the laser source and these measurements, which can be performed during the processing process. The device according to the present disclosure has optical sensors for measuring the intensity and respective current laser power.
A laser assembly, such as a flood illuminator, has laser (e.g., VCSEL) emitters on a substrate configured to emit optical signals. An optic structure of optically transparent material, such as a polymer, is formed directly on the substrate, and micro-optic elements are nano-imprinted on the optic structure. The micro-optic elements are arranged in optical communication with the optical signals emitted from the laser emitters to perform field mapping or other optical functions. The laser emitters are on the same surface of the substrate as the optic structure along with electrical contacts so forming the optic structure involves covering the electrical contacts with a protective layer, dispensing a polymer for the optic structure, cutting away portions of the optic structure, removing the remaining protective layer, and exposing the electrical contacts.
H01S 5/183 - Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
20.
LITHIUM ION COMPLEXES AND THE USE IN ELECTROCHEMICAL DEVICES CONTAINING THE SAME
A new Li-complexing derivative electrolyte for use in an electrochemical device, method of manufacturing said electrolyte, and an electrochemical device is disclosed. The electrolyte includes a Li-ion complex associated with one or more coordinating ligands. The ratio of the Li-ion complex to coordinating ligands is less than and equal to 1.52, and the association of the Li ion complex and the one or more coordinating ligands has an apparent coordination number (ACN) of 3 to 5. An inactive solvent may also be incorporated.
A proposed fabrication technique for a polarization-absorbing wire grid polarizer avoids the need to etch through the multilayer stack of materials to form the grid structure. Initial reflective metal and dielectric buffer layers are patterned and etched in a conventional manner to create the desired grid topology. A small-angle coating process is then used to complete the fabrication process by first coating the top surface of the patterned dielectric with a polarization-absorbing metal. A second coating process is used to cover the created metal coating with a dielectric cladding material. Maintaining a small angle of incidence between the coating source and the wire grid structure ensures that top portions of the grid are suitably covered to create the desired multilayer wire configuration.
C03C 17/36 - Surface treatment of glass, e.g. of devitrified glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions at least one coating being a metal
C03C 15/00 - Surface treatment of glass, not in the form of fibres or filaments, by etching
22.
TEMPERATURE CONTROL FOR COILED GAIN FIBER IN FIBER AMPLIFIER
A temperature controller is used for a gain fiber of a fiber amplifier. The controller includes a heat transfer structure and one or more temperature sinks, such as cooling plates. The heat transfer structure supports the gain fiber and is disposed in thermal contact with it. Portions of the temperature sink(s) are disposed in different thermal conductivity with sections of the heat transfer structure. For example, the sinks may have different material properties and/or material thicknesses. Also, portions of the temperature sink(s) can have different cooling rates. The different thermal conductivities conduct the heat from parts of the gain fiber differently from one another. In the end, an onset of Stimulated Brillouin Scattering (SBS) on the laser light path can be mitigated by conducting heat from the gain fiber with the different thermal conductivities.
Reinforced metal matrix composites are described including a porous ceramic reinforcement and a metal matrix in interstitial contact with the ceramic reinforcement. Methods of forming reinforced metal matrix composites are described including contacting a porous ceramic reinforcement with a liquid metal matrix and solidifying the liquid metal matrix.
A pluggable OTDR is disclosed that is utilizes a specific architecture that separates its passive optical elements from the remaining active optical and electrical elements. The set of active elements (i.e., laser, photodetector, and control/processing electronics) can arranged in a manner similar to a small form-factor pluggable (SFP) optical transceiver and assembled within a housing that meets these requirements. The passive optics may be incorporated into a separate optical fiber pigtailed component that is attached between the active OTDR module and a fiber span under test.
An embodiment includes a light source. The light source may include a substrate and a diffuser. The substrate may include a first surface and a second surface. The second surface may be opposite the first surface. The diffuser may be carried by the substrate. The diffuser may be configured to receive an optical signal from the substrate after the optical signal propagates through the substrate and to control a particular profile of a resultant beam of the optical signal over two axes after the optical signal propagates through the integrated diffuser.
G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
H01S 5/0236 - Fixing laser chips on mounts using an adhesive
H01S 5/026 - Monolithically integrated components, e.g. waveguides, monitoring photo-detectors or drivers
H01S 5/183 - Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
Advanced hologram techniques pre-calculate holograms to be displayed on an LCoS switch panel of a wavelength selective switch (WSS) module. The holograms are generated offline and are then stored on the WSS module for later retrieval. Each of the holograms is associated with a defined parameter, such as an attenuation level, and each of the holograms is configured to create a reconfigurable phase grating profile or pattern of the pixels of the LCoS switch panel. Each phase pattern selectively directs desired diffraction orders of optical channels from the LCoS switch panel for output to selected ports and selectively directs undesired diffraction orders away from the ports and at a desired attenuation level. During operation, the WSS module can retrieve the stored holograms. Interpolation can determine intermediate holograms between parameter values, and a ramp function can be added to the pattern to account for steering adjustments.
A display includes a stack that includes, from top to bottom: a display layer including an array of spaced pixels and/or spaced subpixels and an array of spaced transmission spaces, wherein each transmission space is defined by a spacing between a subset of the spaced pixels and/or spaced subpixels; a micro-lens array (MLA) layer including an array of micro-lenses, wherein each micro-lens includes a curved surface in alignment with a corresponding one of the transmission spaces; and a laser light emitting (LLE) layer including an array laser diodes, wherein each laser diode is positioned in alignment with one micro-lens of the MLA layer and the corresponding one of the transmission spaces of the display layer and the curved surfaces of the micro-lenses face the LLE layer.
F21V 8/00 - Use of light guides, e.g. fibre optic devices, in lighting devices or systems
G06V 10/145 - Illumination specially adapted for pattern recognition, e.g. using gratings
H01L 25/075 - Assemblies consisting of a plurality of individual semiconductor or other solid state devices all the devices being of a type provided for in the same subgroup of groups , or in a single subclass of , , e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group
An integrated circuit has fuses that are selectively configurable by laser light having a wavelength incident on the fuses. A substrate of the integrated circuit has circuitry thereon. Fuses are disposed vertically above at least a portion of the circuitry. A dielectric reflector is disposed vertically above and laterally covers at least a portion of the circuitry. The dielectric reflector has a plurality of alternating dielectric layers of different refractive indices and is disposed adjacent to the fuses. The dielectric reflector is configured to reflect at least a portion of the laser light at the wavelength incident thereto.
H01L 23/525 - Arrangements for conducting electric current within the device in operation from one component to another including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body with adaptable interconnections
H01L 23/532 - Arrangements for conducting electric current within the device in operation from one component to another including external interconnections consisting of a multilayer structure of conductive and insulating layers inseparably formed on the semiconductor body characterised by the materials
31.
Laser System with Harmonics - Generation in the Visible and UV Spectral Range
A laser system includes one or more harmonic generator blocks or elements including one or more crystals for converting a first wavelength (λ1) laser beam into second, third and/or fourth wavelength (λ2, λ3 and/or λ4) laser beams that may be output, with or without the first wavelength (λ1) laser beam, on different beam paths. One or more of the first, second, third and/or fourth wavelength laser beams may travel or traverse in a crystal in one or multiple directions.
An assembly is used with an amplifier that amplifies light using source light, pump light, and a doped fiber. The assembly has a plurality of ports, including a first port for input of the source light, a second port for input of the pump light, a third port for output to the doped fiber, a fourth port for input from the doped fiber, and a fifth port for amplified output. A birefringent device in optical communication with each of the ports is configured to refract o-light and e-light components of the light passing therethrough with different refractive indices. For the first and fourth ports, a first half-wave plate in optical communication through the birefringent device is configured to rotate polarization of the light passing therethrough with a first rotation. For the second port, a second half-wave plate in optical communication through the birefringent device is configured to rotate polarization of the light passing therethrough with a second rotation different from the first polarization. A lens is used to focus the light, and an optical filter in optical communication with the lens is configured to reflect the pump light back to the lens and being configured to pass the source light. A rotator in optical communication with the lens is configured to rotate polarization of the light passing therethrough with a third rotation. The third rotation is half of the first rotation, and the first rotation is half of the second rotation. Finally, a wedge reflector in optical communication with the rotator is configured to reflect the light incident thereto. The source light and the pump light are combined and communicated from the second port for output to the doped fiber. Meanwhile, amplified light from the doped fiber is received at the fourth port and is communicated to the amplified output. Reverse light from the amplified output can be isolated from reaching the doped fiber, and reverse source light from the doped fiber can be isolated from reaching the source port.
A variable radius mirror includes a mirror element having a deformable face with an outer surface incorporating a reflective element. The deformable face is deformable in response to a pressure applied by a pressure medium acting on an inner surface of the deformable face. A ring extends around a perimeter of the deformable face and protrudes from the inner surface of the deformable face. The mirror element further includes at least one of a plurality of steps recessed at different depths into the inner surface of the deformable face, a cooling cavity having a pair of manifolds between the outer surface and the inner surface of the deformable face, and a sidewall of the ring having a curved inner surface and a curved outer surface.
G02B 26/08 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
G02B 26/06 - Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the phase of light
A battery recycling method removes impurities to ensure production of battery-grade materials. The method includes removing cadmium (Cd) from a pregnant leach solution before recovering valuable battery metals such as nickel (Ni), manganese (Mn), cobalt (Co), and lithium (Li). The removal of the Cd may be performed by precipitating an insoluble organo-complex by adding an organic compound material to the pregnant leach solution. The organic compound material may include one or more of organosulfur, organothiophosphate, benzothiazole compounds or derivatives, such as dithiophosphinate, dithiophosphate, and mercaptobenzothiazole, respectively.
A distributed feedback plus reflection (DFB+R) laser includes an active section, a passive section, a low reflection (LR) mirror, and an etalon. The active section includes a distributed feedback (DFB) grating and is configured to operate in a lasing mode. The passive section is coupled end to end with the active section. The LR mirror is formed on or in the passive section. The etalon includes a portion of the DFB grating, the passive section, and the LR mirror. The lasing mode of the active section is aligned to a long-wavelength edge of a reflection peak of the etalon.
H01S 5/0625 - Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes in multi-section lasers
A short-waveband active optical component based on a vertical emitting laser and a multi-mode optical fiber has an emitting end and a receiving end. In the emitting end, multiple VCSELs generate multiple optical signals of different wavelengths, and multiple photodiodes in the receiving end receive the optical signals emitted by the VCSELs. Both ends use a focusing lens array to collimate and focus the optical signals A Z-block-shaped prism performs a light combining function at the emitting end, while another Z-block-shaped prism performs a light splitting function at the receiving end. Both ends use a focusing lens for collimating and focusing the optical signals at ends of a multi-mode optical fiber, which is used for transmitting the optical signals generated by the VCSELs. The short-waveband active optical component has a small size and a high transmission rate.
G02B 6/42 - Coupling light guides with opto-electronic elements
G02B 6/293 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
G02B 6/43 - Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections
An optical switch includes an array of optical fibers to conduct optical signals. A biconvex lens has a front convex surface facing the fibers' tips and has a back convex surface facing a microelectromechanical (MEMS) mirror. The MEMS mirror can be selectively oriented to reflect the optical signals incident to the MEMS mirror so the optical signal input from one fiber can be selectively routed to another of the fibers.
G02B 6/35 - Optical coupling means having switching means
G02B 6/32 - Optical coupling means having lens focusing means
B81B 7/02 - Microstructural systems containing distinct electrical or optical devices of particular relevance for their function, e.g. microelectro-mechanical systems (MEMS)
39.
METHODS FOR ABERRATION CORRECTION IN HIGH NUMERICAL APERTURE OPTICAL SYSTEMS
Described herein is a wavelength dispersive optical system (10). The system (10) comprises at least one optical input (12, 14, 16) for projecting an input optical beam comprising a plurality of individual wavelength components and at least one optical output (18) for receiving one or more output optical beams. The system (10) also includes a diffractive optical element (DOE) (1) including a substrate (2) and an array of physical diffraction elements (3). The diffraction elements (3) have a predefined spacing and/or curvature across a length of the DOE (1) and are collectively adapted to: i) spatially separate the individual wavelength components within the input optical beam to be formed into the one or more output optical beams; ii) impose predefined phase changes to the wavelength components to at least partially correct for optical aberrations to the input optical beam; and iii) impose predefined phase changes to the wavelength components to apply a wavelength dependent optical focusing to at least some of the wavelength components. The system (10) further includes an optical focusing element (5) having optical focusing properties complementary to the DOE (1) to modify the wavelength-dependent optical focusing of the wavelength components by the DOE (1).
A VC SEL can include: a substrate that passes light therethrough; a phase matching layer over a top mirror stack; a first metal layer over the phase matching layer; and an end metal region over the first metal layer. The phase matching layer and first metal layer have a cooperative thickness to provide reflectivity of at least a predetermined reflectivity threshold for the emission wavelength. A method of making a VCSEL can include: providing a substrate; forming a first mirror stack above the substrate; forming an active region above the first mirror stack; and forming a reflective end above the active region, the reflective end having a phase matching layer and a first metal layer. The phase matching layer and first metal layer have a combined thickness for the reflective end to have a reflectivity of at least a predetermined reflectivity threshold for an emission wavelength of the VCSEL.
H01S 5/183 - Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
H01S 5/343 - Structure or shape of the active region; Materials used for the active region comprising quantum well or superlattice structures, e.g. single quantum well [SQW] lasers, multiple quantum well [MQW] lasers or graded index separate confinement heterostructure [GRINSCH] lasers in AIIIBV compounds, e.g. AlGaAs-laser
A laser may include a lower semiconductor structure and an upper semiconductor structure. The lower semiconductor structure may include a lower waveguide along a top side of the lower semiconductor structure. The upper semiconductor structure may include an upper waveguide along a bottom side of the upper semiconductor structure. The upper semiconductor structure may be positioned over the top side of the lower semiconductor structure such that a first portion of the upper waveguide vertically overlaps a second portion of the lower waveguide. A coupler between the upper waveguide and the lower waveguide may couple optical energy of the upper waveguide to the lower waveguide. The lower waveguide may comprise semiconductor material having a wider bandgap than semiconductor material of the upper waveguide.
A method of forming a semiconductor device may include providing semiconductor substrate having a substrate top side and a dielectric layer along the substrate top side and forming a first mask layer over the dielectric layer. The method may include forming a lower cladding wall and an upper cladding wall via a first opening in the first mask layer. The method may also include forming a second mask layer over the dielectric layer and forming side cladding walls via second openings in the second mask layer. Various semiconductor devices having a buried waveguide in formed via the method are also disclosed.
A wafer has a layer containing silicon, a layer of polycrystalline diamond deposited on the silicon-containing layer, and a bow-compensation layer on the other side of the silicon-containing layer for reducing wafer-bow. A method of making a bonded structure includes an activation process for creating dangling bonds on the surface of one substrate, followed by contact-bonding the surface to a second substrate at low temperature. A bonded structure may include two substrates contact bonded to each other, one substrate including a layer containing silicon, a layer of polycrystalline diamond, a bow-compensation layer for reducing wafer-bow of the first substrate, and the other substrate including gallium nitride, silicon carbide, lithium niobate, lithium tantalate, gallium arsenide, indium phosphide, or another suitable material other than diamond.
B32B 9/00 - Layered products essentially comprising a particular substance not covered by groups
B32B 38/00 - Ancillary operations in connection with laminating processes
B32B 37/18 - Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only
45.
HAIRPIN WELDING AND INSPECTION FOR QUALITY ASSURANCE
A method of welding and evaluating welds on stator hairpins includes obtaining first data representative of the ends of a first pair of stator hairpins by capturing image data representative of the ends, and processing the image data to obtain a data set representative of a rectangle which fully encloses the end surfaces of the stator hairpins. After the data set is saved, a laser may be used to form a weld on the end surfaces of the stator hairpins. Then, second data is obtained representative of the weld, and the weld is evaluated by comparing the second data to the data set. A system for welding and evaluating welds on the ends of stator hairpins is also disclosed. A digital camera may be used to capture data, and the laser may be used to form the welds on the stator hairpins.
B23K 31/12 - Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups relating to investigating the properties, e.g. the weldability, of materials
09 - Scientific and electric apparatus and instruments
Goods & Services
Lasers not for medical use, namely, lasers for structured light pattern generation for use in industrial applications including machine vision, 3d mapping, alignment, and industrial inspection, not including laser pointing devices for use with firearms
VCSEL-based flood illuminators are fabricated to be compact and surface-mounted devices. A substrate is constructed as a panel array having top and bottom electrodes. Individual ones of the VCSEL dies are mounted in electrical communication with pairs of the top electrodes. The VCSEL dies are encased in an encasement disposed on the top surface of the substrate, and a diffuser structure is nano-imprinted adjacent each of the VCSEL dies. The encasement can use a potting resin and a polymer layer. The potting resin encases the VCSEL dies. The polymer layer is softer and is disposed on the potting resin. Nanoimprint lithography forms the diffuser structures in the polymer layer. The panel array is then singulated to form the individual VCSEL-based flood illuminators.
H01S 5/183 - Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
A mesa structure for a VCSEL device is particularly configured to compensate for variations in the shape of the created oxide aperture that result from anisotropic oxidation. In particular, a suitable mesa shape is derived by determining the shape of an as-created aperture formed by oxidizing a circular mesa structure, and then ascertaining the compensation required to convert the as-created shape into a desired (“target”) shaped aperture opening. The compensation value is then used to modify the shape of the mesa itself such that a following anisotropic oxidation yields a target-shaped oxide aperture.
H01S 5/183 - Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
H01S 5/30 - Structure or shape of the active region; Materials used for the active region
H01S 5/20 - Structure or shape of the semiconductor body to guide the optical wave
50.
ADDITIVE MANUFACTURE IN METALS WITH A FIBER ARRAY LASER SOURCE AND ADAPTIVE MULTI-BEAM SHAPING
A system that uses a scalable array of individually controllable laser beams that are generated by a fiber array system to process materials into an object. The adaptive control of individual beams may include beam power, focal spot width, centroid position, scanning orientation, amplitude and frequency, piston phase and polarization states of individual beams. Laser beam arrays may be arranged in a two dimensional cluster and configured to provide a pre-defined spatiotemporal laser power density distribution, or may be arranged linearly and configured to provide oscillating focal spots along a wide processing line. These systems may also have a set of material sensors that gather information on a material and environment immediately before, during, and immediately after processing, or a set of thermal management modules that pre-heat and post-heat material to control thermal gradient, or both.
An optical driver circuit is described herein having a plurality of drive cells and delay segments between their control signals resulting in the control of the rising and falling edge rates for an optical device driven by the optical driver circuit.
H03K 5/133 - Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals using a chain of active-delay devices
This disclosure is directed an electrode and methods of making an electrode. The electrode includes a substrate and a body laminated to the substrate. The body includes an active material and an inactive material. A plurality of pores are defined by the body. A plurality of cracks are defined in a first surface of the body and a plurality of islands are defined in the first surface of the body. The plurality of cracks are wholly or partially surrounded by respective cracks of the plurality of cracks.
In a wavelength selective switch, an input port transmits an input beam, and diffraction grating disperses the input beam into optical channels. A liquid-crystal-on-silicon (LCoS) switch assembly has a phase grating profile and has addressable pixels, which are liquid crystal based. The LCoS switch assembly can selectively direct first-order diffracted beams of the optical channels for output to selected output ports. A tunable optical wedge adjacent the LCoS switch assembly can direct higher-order diffraction beams in the space between the output ports to reduce crosstalk. The wedge is a liquid crystal cell having spaced-apart resistive layers and having liquid crystal material disposed between the layers. In the wedge, the liquid crystal material can produce a phase profile in response to bias voltages applied to the resistive layers, and a beam steering angle of the phase profile can direct at least the second-order diffracted beams towards the port spacing between the ports.
G02F 1/29 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
G02F 1/313 - Digital deflection devices in an optical waveguide structure
H04J 14/02 - Wavelength-division multiplex systems
H04Q 11/00 - Selecting arrangements for multiplex systems
09 - Scientific and electric apparatus and instruments
Goods & Services
Fiber optic testing tools for the management, analysis,
troubleshooting, measuring and monitoring of computer
networks and communication networks; programmable optical
processors; optical filters and switches; electronic and
optical communications instruments and components, namely,
optical transmitters, optical receivers, optical
transceivers, cable television transmitters, digital
transmitters, and communication link testers for testing
communication links.
57.
OPTOELECTRONIC DEVICE HAVING ATTENUATING LENS BLOCK AND SOURCE MONITORING
An optoelectronic device is used with an optical fiber for data transmission and has a transmitter mounted on a printed circuit board (PCB) to emit light. A collimation lens on a lens block receives the light incident thereto. A microstructure on a reflective surface of the lens block has sections that reflect the light into attenuated portions. A focusing lens on the lens block focuses a first attenuated portion from first sections of the reflective surface to the optical fiber. Meanwhile, second sections of the reflective surface reflect a second attenuated portion to another reflective surface on the lens block. The second attenuated portion passes out of a refractive surface on the lens block to an receiver, which is mounted on the PCB adjacent the transmitter. The second attenuated portion of the light can be used to monitor the optical output of the transmitter.
Valuable metal compounds and a useful by-product are recovered, with high yield, from lithium-ion battery waste, without otherwise generating effluent. One or more metal sulfate solution may be used to scrub the metals from organic extractants. The sulfates may be produced in one or more evaporation/crystallization units downstream from precipitation and dissolution units. An organic extractant may be used to extract a metal of interest and other metals from feed material, scrub the other metals from the organic extractant, strip the metal of interest from the organic extractant, and recycle the extractant. An evaporation/crystallization unit may be used to output the metal of interest, while a return line transports a metal sulfate mother liquor from the evaporation/crystallization unit (after hydroxide precipitation and dissolution for purification) for use in scrubbing the other metals from the organic extractant after pH and metal concentration adjustment.
Laser circuits are disclosed herein that include, in one example, a proxy laser drive cell and a proxy comparator circuit for deriving a laser driver bias control using one or more constant current supplies. Comparator circuits are disclosed that are adapted to generate an output based on a proxy voltage having first and second voltage components wherein one of the voltage components is developed based on one or more constant current supplies indicative of laser control current.
H01S 5/026 - Monolithically integrated components, e.g. waveguides, monitoring photo-detectors or drivers
H01S 5/183 - Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only vertical cavities, e.g. vertical cavity surface-emitting lasers [VCSEL]
62.
Laser Beam Brilliance Enhancing Beam Splitting for Laser Welding/Brazing
A laser processing head can be used for joining (e.g., welding, brazing, soldering, etc.) workpieces. A collimator collimates laser light, which passes to a beam splitter. The beam splitter has anti-reflective and high-reflective coatings on peripheral and inner areas of the beam splitter. The beam splitter splits the collimated light into central or inner light from the inner area and peripheral light from the peripheral area. A main output in communication with the beam splitter directs at least the peripheral light into a main beam toward the workpieces. For example, a cable can feed a brazing wire adjacent the main beam for brazing the workpieces together. Meanwhile, a secondary output in communication with the beam splitter directs at least the central light into a secondary beam, which can be used to pre-heat the workpiece, post-heat the workpiece, or remove any surface coating from the workpiece.
A process for recovering and purifying nickel (Ni), manganese (Mn), cobalt (Co), and lithium (Li) from black mass obtained from recycling of lithium-ion batteries to produce high purity products. The process may include reductive acid leaching, impurity removal, precipitation of valuable metals such as Ni, Co, Mn, and Li. The process may also include recycling of Li compounds as hydroxide or carbonate as a source of alkaline reagent for impurity removal and/or precipitation of the valuable metals.
A wavelength reference device can be used to self-calibrate an optical channel monitor. The device includes a broadband source, a thermal source, and an optical filter, which can include one or more filters. A housing can house each of these components or can house at least the broadband source and thermal source. The broadband source emits an optical signal along an optical path. The thermal source in thermal communication with the broadband source can adjust the operating temperature of the broadband source within a temperature range. The temperature range is configured to shift optical power of the broadband source with respect to a multi-band wavelength division multiplexing (WDM) range such that the optical power meets a minimum power level towards lower and higher frequencies of the range. The optical filter(s) positioned in the optical path can filter the optical signal to create a spectral shape for use in wavelength referencing.
H04J 14/02 - Wavelength-division multiplex systems
H04B 10/079 - Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
65.
Wavelength Reference Having Repeating Spectral Features and Unique Spectral Features
A wavelength reference device includes a broadband optical source, a repeating filter, and a wavelength-specific filter. The source, which can be a super-luminescent light-emitting diode (SLED), emits optical power. The repeating filter, which can be a Fabray-Perot etalon, filters the optical power into a repeating spectral response, and the wavelength-specific filter attenuates the optical power of at least one predefined wavelength response within the wavelength band. The repeating filter and the wavelength-specific filter output a wavelength reference signal having the repeating spectral response attenuated at the at least one predefined wavelength response. The predefined wavelength response reduces the ambiguity that can occur in the repeating frequency locations found in the repeating spectral response. In this way, an absolute wavelength reference is intrinsically provided in the wavelength reference that removes the location ambiguity caused by the repeating spectral response.
A process for recovering and purifying nickel (Ni), manganese (Mn), cobalt (Co), and lithium (Li) from black mass obtained from recycling of lithium-ion batteries to produce high purity products. The process may include reductive acid leaching, impurity removal, precipitation of valuable metals such as Ni, Co, Mn, and Li. The process may also include recycling of Li compounds as hydroxide or carbonate as a source of alkaline reagent for impurity removal and/or precipitation of the valuable metals.
A mirror device includes a multi-phase substrate and a single-phase layer. The multi-phase layer is formed of reaction-bonded silicon-carbide (RB-SiC, or Si/SiC) material. The single-phase layer is formed of elemental silicon. The single-phase layer is formed in-situ, that is, contemporaneously with, the formation of RB-SiC material. The single-phase layer is integrally bonded, as one piece, to silicon of the multi-phase substrate. Methods of making a multi-layer device, such as a mirror device, are also described. One such method includes providing a porous mass of silicon carbide and carbon, causing molten elemental silicon to infiltrate the porous mass to form RB-SiC material, simultaneously causing the silicon to flow into a cavity to form a single-phase layer of polishable silicon, integrally bonding silicon in the cavity to the RB-SiC material, and, if desired, polishing a surface of the single-phase layer.
G02B 1/02 - Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of crystals, e.g. rock-salt, semiconductors
B24B 13/00 - Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
C04B 35/573 - Fine ceramics obtained by reaction sintering
C04B 41/00 - After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
C04B 41/91 - After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics involving the removal of part of the materials of the treated articles, e.g. etching
A frozen substance maker may include a heat pump, a cold plate, a mold base, a mold top, and an agitator. The cold plate may be in thermal communication with the heat pump. The mold base may be positioned o the cold plate. The mold base and the cold plate may define a seed crystal chamber. The mold top may be positioned on the mold base. The mold base and the mold top may define a mold cavity in fluid communication with the seed crystal chamber. The mold top may define an overflow reservoir in fluid communication with the mold chamber. The agitator may be located at least partially within the overflow reservoir.
An optical fiber filter has an ultra-wide tuning range and includes a two-dimensional mechanical rotating mirror, a collimating and beam expanding system, and two grating. An input fiber emits a multi-wavelength optical signal into the rotating mirror, which reflects the signal to the system to form collimated beams. In turn, the collimated beams are incident on the gratings that disperse the light of different wavelengths to different angles. Lights of different diffraction angles are input into an output fiber by adjusting the rotating mirror. The rotating mirror can be used to switch between gratings of different wavebands to tune optical wavelengths in an ultra-wide range.
G02B 6/293 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
A composite extractant-enhanced polymer resist comprising an extractant and a polymer resin for direct extraction of valuable metals such as rare earth metals, and more specifically, scandium, Born an acid-leaching slurry and/or acid-leaching solution in which ferric ions are not required to be reduced into ferrous ions. The extractant may be cationic, non-ionic, or anionic. More specifically, the extractant di(2-ethylhexyl)phosphoric acid may be used. The polymer resin may be non-functional or have functional groups of sulfonic acid, carboxylic acid, iminodiacetic acid, phosphoric acid, or amines. The composite extractant-enhanced polymer resin may be used for extraction of rare earth metals from acid-leaching slurries or solutions.
B01J 49/06 - Regeneration or reactivation of ion-exchangers; Apparatus therefor of fixed beds containing cationic exchangers
C22B 3/38 - Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds containing phosphorus
B01J 20/22 - Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
C01F 17/10 - Preparation or treatment, e.g. separation or purification
B01J 47/016 - Modification or after-treatment of ion-exchangers
B01J 47/011 - Ion-exchange processes in general; Apparatus therefor using batch processes
A laser device includes front and back DBRs and an interferometer. The front DBR is coupled to a front DBR electrode. The front DBR forms a first tunable multi-peak lasing filter. The back DBR is coupled to a back DBR electrode. The back DBR forms a second tunable multi-peak lasing filter. The interferometer part is coupled between the front DBR and the back DBR. The interferometer part includes first and second waveguide combiners and first and second interferometer waveguides coupled therebetween. The first waveguide combiner couples the interferometer part to the back DBR. The second waveguide combiner couples the interferometer part to the front DBR. The first interferometer waveguide is coupled to an interferometer electrode. The interferometer forms a third tunable multi-peak lasing filter.
An EDFA may include an input photodiode configured to generate a control signal based on an input signal. The EDFA may include a blind stage configured to generate an amplified signal based on the control signal and the input signal. The EDFA may include a non-blind stage configured to generate an output signal based on the amplified signal within the blind stage, the control signal, and a feedback signal. The EDFA may include a filter configured to generate a filtered signal based on the output signal. The EDFA may include an output photodiode configured to generate the feedback signal based on the filtered signal. The EDFA may include an alarm device. A signal within the non-blind stage may be generated based on the feedback signal and the control signal. The alarm device may be configured to generate an alarm signal when the signal exceeds a threshold value.
H01S 3/10 - Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
H01S 3/094 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
In an example embodiment, a system includes a first grating-coupled laser (GCL) that includes a first laser cavity optically coupled to a first transmit grating coupler configured to redirect horizontally-propagating first light, received from the first laser cavity, vertically downward and out of the first GCL. The system also includes a second GCL that includes a second laser cavity optically coupled to a second transmit grating coupler configured to transmit second light vertically downward and out of the second GCL. The system also includes a photonic integrated circuit (PIC) that includes a first receive grating coupler optically coupled to a first waveguide and configured to receive the first light and couple the first light into the first waveguide. The PIC also includes a second receive grating coupler optically coupled to a second waveguide and configured to receive the second light and couple the second light into the second waveguide.
H01S 5/187 - Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only horizontal cavities, e.g. horizontal cavity surface-emitting lasers [HCSEL] using Bragg reflection
G02B 6/124 - Geodesic lenses or integrated gratings
G02B 6/12 - Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
G02B 6/293 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
H01S 5/10 - Construction or shape of the optical resonator
H01S 5/026 - Monolithically integrated components, e.g. waveguides, monitoring photo-detectors or drivers
An amplifier operable with an electric drive signal can amplify signal light having a signal wavelength. A laser diode has an active section with input and output facets. The facets are in optical communication with the signal light and are configured to pass the signal light through the laser diode. The active section is configured to generate pump light in response to injection of the electrical drive signal into the active section. The pump light has a pump wavelength different from the signal wavelength. A doped fiber doped with an active dopant is in optical communication with the signal light and is in optical communication with at least a portion of the pump light from the laser diode. The pump wavelength of the pump light is configured to interact with the active dopant of the fiber and thereby amplify the signal light.
H01S 3/0941 - Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a semiconductor laser, e.g. of a laser diode
A method for determining timing information in an optical communication link includes transmitting a falling edge from a transceiver positioned at a near end of the optical communication link and simultaneously starting a first timer at the transceiver positioned at the near end of the link. The transmitted falling edge is received at a transceiver positioned at a far end of the link. A falling edge is transmitted from the transceiver positioned at the far end of the link after a response delay. The transmitted falling edge is received at the transceiver positioned at the near end of the link while the first timer is simultaneously terminated at the transceiver positioned at the near end of the link and the elapsed time is recorded. The total link delay is determined based on the elapsed time.
H04B 10/077 - Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
H04B 10/079 - Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
79.
IMMOBILIZED CHALCOGEN AND USE THEREOF IN A RECHARGEABLE BATTERY
An immobilized chalcogen system or body includes a mixture or combination of chalcogen and carbon. The carbon can be in the form of a carbon skeleton. The chalcogen can include oxygen, sulfur, selenium, or tellurium, or a combination of any two or more of oxygen, sulfur, selenium, and tellurium. The activation energy for chalcogen to escape the immobilized chalcogen system or body is ≥96 kJ/mole.
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/38 - Selection of substances as active materials, active masses, active liquids of elements or alloys
H01M 50/109 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure of button or coin shape
A free-space optical communication system has a conversion assembly, a fiber array, and a wavelength selective switch (WSS) assembly. The conversion assembly converts circular polarization states of incoming optical signals to linear polarization states and converts linear polarization states to circular polarization states for outgoing optical signals. The fiber array has polarization-maintaining (PM) optical fibers arranged in optical communication between the conversion assembly and the WSS assembly to preserve the linear polarization states of the optical signals. The WSS assembly has free-space optics, such as dispersion element and beam-steering element, with optical axes arranged relative to the PM optical fibers. The WSS assembly selectively switches WDM channels of the optical signals relative to the PM optical fibers. Fast and slow axes of the PM optical fibers are aligned to the optical axes of the free-space optics.
The present disclosure provides a MEMS -based variable optical attenuator (VOA) array, sequentially including an optical fiber array, a micro-lens array, and a MEMS-based micro-reflector array to form a VOA array having several optical attenuation units. The MEMS-based micro-reflectors can change the propagation direction of a beam, causing a misalignment coupling loss to the beam and thereby achieving optical attenuation, with a broad range of dynamic attenuation, low polarization dependent loss and wavelength dependent loss, good repeatability, short response time (at the millisecond level), etc. Arrayed device elements are used as assembly units of the present disclosure, and the assembly of arrayed elements facilitates tuning in batches. Accordingly, automation levels are improved, and the production costs are reduced.
A system that uses a scalable array of individually controllable laser beams that are generated by a fiber array system to process materials into an object. The adaptive control of individual beams may include beam power, focal spot width, centroid position, scanning orientation, amplitude and frequency, of individual beams. Laser beam micro scanner modules (MSMs) are arranged into 2D arrays or matrices. During operation of the MSMs, a fiber tip that projects the laser beam is displaced along the x and y-axis in order to scan the focal spot. Each MSM within a matrix can process a corresponding cell (e.g., one square centimeter) during focal spot scanning, and the plurality of MSMs may be operated in parallel to process a plurality of corresponding cells (e.g., with a 10×10 matrix of MSM, 100 cm2) without rastering or otherwise repositioning the assembly over the build surface.
B23K 26/082 - Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
B29C 64/153 - Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
B29C 64/236 - Driving means for motion in a direction within the plane of a layer
B29C 64/268 - Arrangements for irradiation using electron beams [EB]
B23K 26/08 - Devices involving relative movement between laser beam and workpiece
B23K 26/06 - Shaping the laser beam, e.g. by masks or multi-focusing
An apparatus for growing a crystal includes a growth chamber and a melt chamber thermally isolated from the growth chamber. The growth chamber includes: a growth crucible configured to contain a liquid melt; and a die located in the growth crucible, the die having a die opening and one or more capillaries extending from within the growth crucible toward the die opening. The melt chamber includes: a melt crucible configured to receive feedstock material; and at least one heating element positioned within the melt chamber relative to the melt crucible to melt the feedstock material within the melt crucible to form the liquid melt. The apparatus also includes at least one capillary conveyor in fluid communication with the melt crucible and the growth crucible to transport the liquid melt from the melt crucible to the growth crucible.
C30B 35/00 - Apparatus not otherwise provided for, specially adapted for the growth, production or after-treatment of single crystals or of a homogeneous polycrystalline material with defined structure
C30B 15/10 - Crucibles or containers for supporting the melt
C30B 15/14 - Heating of the melt or the crystallised materials
An optical element includes a transmissive layer arranged on a substrate and made up of discrete volumes of first and second optical media. The layer is between the substrate and another optical medium. The volumes are arranged so that, averaged over a wavelength’s distance of an incident optical signal, the effective reflectivities of the two surfaces of the transmissive layer and the effective double-pass phase delay through the transmissive layer are substantially constant across the transmissive layer. The reflectivities and phase delay result in net power reflectivity that differs from that of the substrate in direct contact with the other optical medium. The transmissive layer can be arranged as an anti-reflection layer.
09 - Scientific and electric apparatus and instruments
Goods & Services
Spectroscopy instruments and specially adapted accessories, namely, a spectroscopy system comprising specialized optical filters, lasers, detectors, sensors, microscopes and recorded computer software and hardware, used for measuring the chemical composition and molecular structure of materials, and specially adapted accessories for use therewith
86.
LASER-ROUGHENED REACTION-BONDED SILICON CARBIDE FOR WAFER CONTACT SURFACE
A method of making a ceramic device with a controlled roughness includes using a defocused laser beam to roughen a surface of a ceramic substrate, and removing one or more portions of the roughened surface without removing all of the roughened surface. If desired, the ceramic device may include reaction-bonded silicon carbide, and an opening may be formed in the device so that the device can be used to apply a clamping suction to a wafer surface. A ceramic surface with a controlled roughness is also disclosed. The defocused laser beam may be used to make the surface rough enough to prevent it from sticking to a mating element, and to have adequate wear resistance, but not so rough as to prevent the formation of sufficient suction to clamp the surface to a mating element.
A dome protects an articulating gimbal that orients a line-of-sight of a laser beam. The dome is mounted on a host and encloses the articulating gimbal. The dome has first and second shells. The first shell is rotatable about a first axis relative to the host, and the second shell is disposed on the first shell and is rotatable about a second axis relative to the first shell. A first actuator is coupled to the first shell and is configured to rotate the first shell about the first axis relative to the host. A second actuator is coupled to the second shell and is configured to rotate the second shell about the second axis relative to the first shell. A controller is coupled to the first and second actuators and is configured to match the rotation of the first and second shells to the line-of-sight of the laser beam.
A spatial light modulator (100) comprises a liquid crystal material (104), first and second electrodes (106, 108) disposed on opposing sides of the liquid crystal material (104), and a diffractive optical element (120) disposed between the electrodes (106, 108) and extending laterally across the modulator (100). The diffractive optical element (120) comprises an array of diffracting formations (122) formed from sub-wavelength structures. The array of diffracting formations (122) defines a phase profile adapted to modify the incident wavefront of light reflected off the second electrode and to apply a position-dependent wavefront correction to the incident wavefront of light.
89.
SILVER-DOPED SULFUR CATHODE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY
An active cathode material is doped with silver to effectively improve the cathode's electrical conductivity. The active material may be sulfur, and the silver may be in the form of silver, silver sulfide, or both. If desired, the cathode material includes a matrix of conductive nano-particles which include elemental sulfur, silver and or silver sulfide. The present disclosure may be applicable to other battery materials as well, such as, for example, lithium iron phosphate.
H01M 4/58 - Selection of substances as active materials, active masses, active liquids of polyanionic structures, e.g. phosphates, silicates or borates
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
A spatial light modulator (100) comprises a liquid crystal material (104), first and second electrodes (106, 108) disposed on opposing sides of the liquid crystal material (104), and a diffractive optical element (120) disposed between the electrodes (106, 108) and extending laterally across the modulator (100). The diffractive optical element (120) comprises an array of diffracting formations (122) formed from sub-wavelength structures. The array of diffracting formations (122) defines a phase profile adapted to modify the incident wavefront of light reflected off the second electrode and to apply a position-dependent wavefront correction to the incident wavefront of light.
An electrochemical device includes a first electrode having 50 wt.% to 99 wt.% immobilized sulfur, 1 wt. % to 12 wt.% binder, and 0.2 wt.% to 12 wt.% porous composition. The porous composition includes 0.0001 wt.% to 40 wt.% of a first porous material having an average pore size less of than 2 nm and 0.05 wt.% to 40 wt.% of a second porous material having an average pore size of 2 nm to 100 nm. The electrochemical device further includes a second electrode opposed from the first electrode and an electrolyte positioned between the first electrode and the second electrode.
An apparatus is used for spectral beam combining laser wavelengths into a combined beam. The apparatus has an integrated, sealed optical assembly that can be installed and replaced in the field. The optical assembly has a housing composed of a material, such as fused silica, transparent to the laser wavelengths. Transmissive gratings are disposed on ends of the housing and have their datums facing the sealed interior. V-grooves on a shelf at one end of the housing are disposed at an angle relative to the first grating. Fiber ends of a fiber array have end caps affixed in the V-grooves and aligned to the datums of the first grating. The fiber ends transmit the laser wavelengths in an array of beams toward the first grating, which diffracts the laser wavelengths to the second grating. In turn, the second grating transmits the laser wavelengths as a combined beam from the second end of the housing.
G02B 6/293 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
An electrochemical device includes a first electrode having 50 wt.% to 99 wt.% immobilized sulfur, 1 wt. % to 12 wt.% binder, and 0.2 wt.% to 12 wt.% porous composition. The porous composition includes 0.0001 wt.% to 40 wt.% of a first porous material having an average pore size less of than 2 nm and 0.05 wt.% to 40 wt.% of a second porous material having an average pore size of 2 nm to 100 nm. The electrochemical device further includes a second electrode opposed from the first electrode and an electrolyte positioned between the first electrode and the second electrode.
H01M 4/136 - Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
H01M 4/1397 - Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
H01M 4/02 - Electrodes composed of, or comprising, active material
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
Described herein is a wavelength reference device comprising a housing defining an internal environment having a known temperature. A broadband optical source is disposed within the housing and configured to emit an optical signal along an optical path. The optical signal has optical power within a wavelength band of interest. An optical etalon is also disposed within the housing and positioned in the optical path to filter the optical signal to define a filtered optical signal that includes one or more reference spectral features having a known wavelength at the known temperature. The device also includes an optical output for outputting the filtered optical signal.
An optoelectronic circuit used with signal light comprises photonic devices disposed on a platform. The photonic devices are configured to condition the signal light and are fabricated with an optical characteristic being electronically tunable. A fabricated performance of the optical characteristic can be varied from a target performance due to a difference (e.g., alteration, change, error, or discrepancy) in the process used to fabricate the device. A ground bus, a power bus, and banks of electronic components are disposed on the platform in electrical communication with the photonic devices. The electronic components in a given bank are selectively configurable to tune the optical characteristic of the associated device so a variance can be diminished between the fabrication and target performances of the device's optical characteristic due to the difference in the fabrication process.
G02B 6/12 - Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
G02B 6/13 - Integrated optical circuits characterised by the manufacturing method
97.
OPTICAL TRANSCEIVER WITH INTEGRATED DISPERSION COMPENSATION FOR HIGH BIT RATE APPLICATIONS
An optical configuration for providing chromatic dispersion compensation in a high data rate communication system is based upon using optical dispersion compensation in the receive signal path prior to performing an O/E conversion. The performance of chromatic dispersion compensation in the optical domain thus presents a "corrected" optical signal as an input to the photodetecting device. The inclusion of optical-based chromatic dispersion compensation allows for a higher data rate to be used without introducing an unacceptable bit error rate; alternatively, the use of optical-based dispersion correction allows for the reach of a data communications network to be increased.
H04B 10/2513 - Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
G02B 6/293 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
A system may include a wafer that includes ICs and defines cavities. Each cavity may be formed in a BEOL layer of the wafer and proximate a different IC. The system may also include an interposer that includes a transparent layer configured to permit optical signals to pass through. The interposer may also include at least one waveguide located proximate the transparent layer. The at least one waveguide may be configured to adiabatically couple at least one optical signal out of the multiple ICs. Further, the interposer may include a redirecting element optically coupled to the at least one the waveguide. The redirecting element may be located proximate the transparent layer and may be configured to receive the at least one optical signal from the at least one waveguide. The redirecting element may also be configured to vertically redirect the at least one optical signal towards the transparent layer.
A bulk acoustic resonator operable in a bulk acoustic mode includes a resonator body mounted to a separate carrier that is not part of the resonator body. The resonator body includes a piezoelectric layer, a device layer, and a top conductive layer on the piezoelectric layer opposite the device layer. A surface of the device layer opposite the piezoelectric layer is for mounting the resonator body to the carrier.
