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Coherent light generators June invention type 06/10

20100158054 - Laser system with picosecond pulse emission: The invention relates to a device (1) for generating short pulses, said device being characterised in that it comprises: a polarised pulse laser (10, 2, 3) having a polarisation direction; a bi-refringent optical fibre (6) having bi-refringence axes, wherein said polarisation direction is not co-linear with said bi-refringence axes; an... Agent: Arent Fox LLP

20100158055 - Method and apparatus for controlling and monitoring laser power in barcode readers: A method of monitoring the output power of a laser diode in a barcode reader. The method includes sampling a threshold monitoring-current that is related the driving-current passing through the laser diode during a first time period when this current is at the lasing threshold of the laser diode. The... Agent: Motorola, Inc.

20100158056 - Semiconductor laser device: Provided is a semiconductor laser device including: a gain area where multi-wavelength lights are generated and gain are provided; a first reflection area where among the multi-wavelength lights, a first-wavelength light is reflected to the gain area in response to a first selection signal; a second reflection area where among... Agent: Rabin & Berdo, PC

20100158057 - Feedback control for heated tosa: A closed loop system for controlling laser temperature without the need for additional sensors or other hardware. Embodiments utilize an existing automatic power feedback loop and existing sensors to determine the temperature of a TOSA based on changes in laser bias current, thus avoiding the need for the additional hardware.... Agent: Workman Nydegger 1000 Eagle Gate Tower

20100158058 - Laser module: A laser module (1) with at least two laser units (3) are adjusted such that the emitted beams of the laser units (3) converge. The laser units (3) exhibit cooling channels (5) that are provided with a cooling medium. At least one of the laser units has a curved adjustment... Agent: William H. Dippert Eckert Seamans Cherin & Mellott, LLC

20100158060 - Laser diode assemblies: Laser diodes (120) emit laser beams along a vertical YZ plane at different distances from the YZ plane. The beams are collimated in their fast and slow axes, and are redirected by turning mirrors (162) to form a beam stack (130C) traveling along the XZ plane. The beam stack is... Agent: Haynes And Boone, LLPIPSection

20100158059 - Semiconductor laser apparatus: A semiconductor laser apparatus of the present invention includes: a semiconductor laser chip 1 having an electrode 11 formed on a surface of the semiconductor laser chip 1; a heat sink 3 for the semiconductor laser chip 1; a submount 2 disposed between the semiconductor laser chip 1 and the... Agent: Hamre, Schumann, Mueller & Larson P.C.

20100158061 - Color-controlled illumination device: The invention relates to a color-controlled illumination device (1) with a number of light emitters, for example LEDs (L1, L2, L3, L4), of different primary colors. Photosensors (D1, D2, D3) consisting of a photodiode (20) covered with different dielectric filter layers (21) measure the light output of the light emitters... Agent: Philips Intellectual Property & Standards

20100158062 - Adapted semiconductor laser package: An adapted semiconductor laser package that may convert a first type of package pin-out arrangement to a desired pin-out arrangement. The laser package may include a laser package including a laser, an isolator, a lens, a fiber sleeve, and a pin-out arrangement. The isolator and the fiber sleeve may be... Agent: Emcore Corporation

20100158064 - Semiconductor light emitter: A semiconductor light emitter includes a quantum well active layer which includes nitrogen and at least one other Group-V element, and barrier layers which are provided alongside the quantum well active layer, wherein the quantum well active layer and the barrier layers together constitute an active layer, wherein the barrier... Agent: Dickstein Shapiro LLP

20100158063 - Tunable laser with a distributed bragg grating comprising a bragg section made of strained bulk material: The general field of the invention is that of tunable semiconductor devices with distributed Bragg grating, and more particularly that of tunable lasers with distributed Bragg grating termed DBRs. The device according to the invention comprises a passive Bragg section comprising a material whose optical index variations are controlled by... Agent: Lowe Hauptman Ham & Berner, LLP

20100158065 - Surface-emission laser devices, surface-emission laser array having the same, electrophotographic system and optical communication system: A surface-emission laser device comprises an active layer, cavity spacer layers provided at both sides of the active layer, reflection layers provided at respective sides of the cavity spacer layers, the reflection layers reflecting an oscillation light oscillated in the active layer and a selective oxidation layer. The selective oxidation... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20100158066 - Nitride semiconductor laser element: A nitride semiconductor laser element includes a nitride semiconductor layer of a first conduction type, an active layer, and a nitride semiconductor layer of a second conduction type that is different from the first conduction type are laminated in that order, a cavity end face formed by the nitride semiconductor... Agent: GlobalIPCounselors, LLP

20100158067 - Optical module: An optical module comprising a laser device adapted to emit a laser beam from a convex surface and including a horizontal resonator surface-emitting structure provided with a first lens through which an optical axis of the laser beam passes, and a second lens through which the laser beam having passed... Agent: Mattingly & Malur, P.C.

20100150183 - Frequency-tripled fiber mopa: Fundamental-wavelength pulses from a fiber a laser are divided into two portions and the two portions are separately amplified. One of the amplified fundamental-wavelength pulse-portions is frequency-doubled. The frequency doubled portion is sum-frequency mixed with the other amplified fundamental wavelength pulse-portions to provide third-harmonic radiation pulses.... Agent: Coherent, Inc. C/o Morrison & Forester

20100150184 - Alignment and wavelength selection in external cavity lasers: A method of operating a laser projection system is provided. The projection system comprises an external cavity laser, an optical intensity monitor, laser projection optics, and a controller. The external cavity laser comprises a laser diode, an intra-cavity wavelength conversion device, and a wavelength selective element. According to the method,... Agent: Corning Incorporated

20100150185 - Multi-variable control methods for optical packages: According to one embodiment of the present invention, an optical package comprises one or more semiconductor lasers coupled to a wavelength conversion device with adaptive optics. The optical package also comprises a package controller programmed to operate the semiconductor laser and the adaptive optics based on modulated feedback control signals... Agent: Corning Incorporated

20100150186 - Laser light source and display device: According to the present invention, a laser light source comprises plural semiconductor lasers (2), a solid laser (4), a non-linear material (3) as a wavelength conversion element, a reflection coat (5) formed on one facet of the solid laser, and a reflection coat (6) formed on one facet of the... Agent: Wenderoth, Lind & Ponack L.L.P.

20100150187 - Laser: A laser apparatus in which the elimination of separate optical components to provide intra-cavity polarization and compensation for thermally induced birefringence, and their associated losses, results in an improvement in efficiency and reduction in complexity over prior art designs.... Agent: Alston & Bird LLP

20100150188 - Seed light module for passive optical network: A spectrum-sliced seed light module for a wavelength division multiplexing passive optical network (WDM PON) is provided. The seed light module includes an optical amplifier to amplify seed light, an optical wavelength filter to transmit broadband light, which is output in opposite direction to an output direction of the seed... Agent: Blakely Sokoloff Taylor & Zafman LLP

20100150189 - Laser control method and laser control circuit: A laser control method includes the steps of: using a laser control circuit which includes a constant current circuit that maintains a constant current flowing through a semiconductor laser element, and which includes an adder and a multiplier connected to a stage preceding the constant current circuit, and using detection... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20100150190 - Laser wavelength control: The wavelength of light output from a semiconductor laser varies over time as various parameters vary. Current in a phase section of the semiconductor laser is modified to counteract the wavelength variations. The current in the phase section may be modified in response to video data on a pixel-by-pixel basis... Agent: Microvision, Inc.

20100150191 - Solid-state suspension laser: A solid-state suspension laser. The novel laser includes a gain medium comprised of a plurality of solid-state gain particles suspended in a fluid. The laser also includes a pump source for pumping the gain particles and a resonator for amplifying and outputting laser light generated by the gain medium. In... Agent: Pillsbury Winthrop Shaw Pittman LLP (raytheon Sas)

20100150192 - Laser pump cavity: A laser pump cavity includes a heat sink holder with a central through hole, a plurality of slot portions, and a plurality of single emitters. The single emitter includes a heat sink and a single core disposed on the heat sink. The slot portions are uniformly spaced and surround the... Agent: Jackson Intellectual Property Group PLLC

20100150193 - Mqw laser structure comprising plural mqw regions: Multi-quantum well laser structures are provided comprising active and/or passive MQW regions. Each of the MQW regions comprises a plurality of quantum wells and intervening barrier layers. Adjacent MQW regions are separated by a spacer layer that is thicker than the intervening barrier layers. The bandgap of the quantum wells... Agent: Corning Incorporated

20100150194 - Nitride semiconductor optical element and manufacturing method thereof: In an InGaN-based nitride semiconductor optical device having a long wavelength (440 nm or more) equal to or more than that of blue, the increase of a wavelength is realized while suppressing In (Indium) segregation and deterioration of crystallinity. In the manufacture of an InGaN-based nitride semiconductor optical device having... Agent: Mattingly & Malur, P.C.

20100150195 - Surface-emitting laser device and surface-emitting laser array including same: A surface-emitting laser device is disclosed that includes a substrate connected to a heat sink; a first reflective layer formed of a semiconductor distributed Bragg reflector on the substrate; a first cavity spacer layer formed in contact with the first reflective layer; an active layer formed in contact with the... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20100150196 - Laser diode: The present invention provides a laser diode having both a small vertical far-field beam divergence and a large vertical optical confinement factor, as well as a method of fabricating the laser diode. The laser diode comprises a layer stack of semiconductor material, which includes a mode-splitting layer having a low... Agent: Pequignot + Myers LLC

20100150197 - Laser diode epitaxial wafer and method for producing same: A laser diode epitaxial wafer includes an n-type GaAs substrate, an n-type cladding layer formed on the n-type GaAs substrate, an active layer formed on the n-type cladding layer, and a p-type cladding layer formed on the active layer. The n-type cladding layer, the active layer, and the p-type cladding... Agent: Mcginn Intellectual Property Law Group, PLLC

20100150198 - Saturable absorber mirror: d) a front-side cover layer, it is the object of the invention to provide a saturable absorber mirror having improved properties. To this effect the invention proposes that the interference filter is neither resonant nor anti-resonant at operating wavelength, with the intensity (I) of the electromagnetic stationary wave field of... Agent: Berliner & Associates

20100150199 - Nitride semiconductor light-emitting device: A nitride semiconductor light-emitting device wherein a substrate or nitride semiconductor layer has a defect concentration region and a low defect density region other than the defect concentration region. A portion including the defect concentration region of the nitride semiconductor layer or substrate has a trench region deeper than the... Agent: Harness, Dickey & Pierce, P.L.C

20100150200 - Novel method to optimize micro-optic lens in led flashlight application: A micro-optic lens is disclosed. The micro-optic lens includes a substrate; and a lens element on the substrate, wherein the lens element includes a flat surface and an annularly grooved surface including first facets and second facets, and wherein the first facets collimate a light effectively and the second facets... Agent: Muncy, Geissler, Olds & Lowe, PLLC

20100150201 - Laser system: A laser system including an optical cable jumper with input and output terminals, and a laser gun, wherein the optical jumper transmits a laser beam from a bundle-type optical cable connected to an input terminal thereof to a single-type optical cable connected to an output terminal thereof. The laser gun... Agent: Stein Mcewen, LLP

20100142564 - All-fiber color laser and light-illuminating method thereof: An all-fiber color laser and a light-illuminating method thereof are disclosed. The steps of the light-illuminating method include: providing a fiber color laser having a pump light source and an optical fiber with a multi-level wavelength gain medium, a first grating assembly and a second grating assembly; radiating a laser... Agent: Quintero Law Office, PC

20100142563 - Fiber laser device: A fiber laser device includes a laser pump for irradiating a laser beam, an optical component, an optical fiber and an optical sensor. The optical component has a first and a second output end, wherein a portion of the laser beam is output from the first output end and another... Agent: Jianq Chyun Intellectual Property Office

20100142565 - Laser light source: The present invention relates to a laser light source having a structure that has high durability to support high power output. The laser light source is an optical device that pulse-oscillates laser light and has a resonator, a rare earth element doped fiber, pumping means, Q switch means, and a... Agent: Venable LLP

20100142566 - Multi-band multiwavelength quantum dot mode-locked lasers: A multi-band (multi-colour) multiwavelength mode locked laser diode is provided by dynamic phase compensation of a quantum dot active medium. The laser diode is provided with a PIN diode structure where the active medium consists of a plurality of layers of quantum dots such as those produced by self-assembly from... Agent: National Research Council Of Canada

20100142567 - Branched waveguide multisection dbr semiconductor laser: The present invention concerns tunable distributed Bragg reflector (DBR) semiconductor lasers, in particular a DBR laser with a branched optical waveguide 5 within which a plurality of differently shaped lasing cavities may be formed, and a method of operation of such a laser. The laser may comprise a phase control... Agent: Mark D. Saralino (general) Renner, Otto, Boisselle & Sklar, LLP

20100142568 - Wavelength tunable filter and wavelength tunable laser module: Disclosed are a wavelength tunable filter and a wavelength tunable laser module that are of a codirectional coupler type whose characteristics do not significantly vary with a process error. They are structured so as to include a semiconductor substrate which has a first optical waveguide and a second optical waveguide.... Agent: Mattingly & Malur, P.C.

20100142569 - System and method for optical frequency conversion: A system and method for optical frequency conversion having asymmetric output include a coherent light apparatus. The coherent light apparatus includes a coherent light source that produces a first coherent light, a frequency converter optically coupled to the coherent light source, and a coupling optic optically coupled between the coherent... Agent: Texas Instruments Incorporated

20100142570 - Pulsed laser light source based on frequency conversion: A light emitting device including a waveguide having an electrically pumped gain region, a saturable absorber, a nonlinear crystal, an inclined mirror, and a light-concentrating structure. Light pulses emitted from the gain region are reflected by the inclined minor and focused by the light-concentrating structure into the nonlinear crystal in... Agent: Venable LLP

20100142571 - Multiple distributed feedback laser devices: Provided is a multiple distributed feedback laser device. The laser device includes an active layer, a first diffraction grating, and a second diffraction grating. The substrate includes a first distributed feedback region, a modulation region, and a second distributed feedback region. The first diffraction grating is coupled to the active... Agent: Rabin & Berdo, PC

20100142573 - Optical pulse generator for high power fiber amplifiers: Systems and methods for pre-correcting accumulated optical nonlinear phase error in a shaped optical pulse derived from a continuous wave laser signal are provided. A continuous wave laser signal is received. A pulse signal is received. A shaped optical pulse is generated from the continuous wave laser signal upon being... Agent: Boeing (tlg) C/o Toler Law Group

20100142572 - Method and system for controlling wavelengths of multi-path laser: A method for controlling wavelengths of a multi-path laser is provided. The method includes: obtaining a difference between an actual output wavelength and a target output wavelength of each laser (S601); obtaining a corrected control amount of a temperature controller of each laser by decoupling calculation according to the difference... Agent: Futurewei Technologies, Inc. Ipr & Standards Department

20100142574 - Laser source with coherent beam recombination: A laser source is disclosed with coherent recombination of N spatial monomode laser beams having N phase shifters controlled by a phase-lock device (3). The phase-lock device has an optical device (30) capable of taking at least a portion of each of the N beams. The optical device has an... Agent: Lowe Hauptman Ham & Berner, LLP

20100142576 - (al,ga,in)n diode laser fabricated at reduced temperature: A method of fabricating an (Al,Ga,In)N laser diode, comprising depositing one or more III-N layers upon a growth substrate at a first temperature, depositing an indium containing laser core at a second temperature upon layers deposited at a first temperature, and performing all subsequent fabrication steps under conditions that inhibit... Agent: Gates & Cooper LLP Howard Hughes Center

20100142575 - Edge-emitting semiconductor laser with photonic-bandgap structure formed by intermixing: A separate-confinement heterostructure, edge-emitting semiconductor laser having a wide emitter width has elongated spaced apart intermixed and disordered zones extending through and alongside the emitter parallel to the emission direction of the emitter. The intermixed zones inhibit lasing of high order modes. This limits the slow axis divergence of a... Agent: Coherent, Inc. C/o Morrison & Forester

20100142577 - Nitride semiconductor laser device: A nitride semiconductor laser device includes an n-type AlGaN clad layer, a GaN layer, a first InGaN light guide layer, a light-emitting layer, a second InGaN light guide layer, a nitride semiconductor intermediate layer, a p-type AlGaN layer, and a p-type AlGaN clad layer stacked in this order on a... Agent: Harness, Dickey & Pierce, P.L.C

20100142578 - Surface-emitting laser including two-dimensional photonic crystal: A surface-emitting laser includes an active layer and a two-dimensional photonic crystal and has a resonance mode in an in-plane direction of the two-dimensional photonic crystal. The two-dimensional photonic crystal is composed of a semiconductor and dielectric material that has a refractive index different from that of the semiconductor and... Agent: Canon U.s.a. Inc. Intellectual Property Division

20100142580 - Laser device with coupled laser source and waveguide: a guide structure (40) to deliver light generated by the emitting structure, this guide structure (40) comprising at least a first portion (40.1) and a second portion (40.2), the first portion housing a diffraction grating (3) that forms a reflector of the laser source and cooperates with the emitting structure... Agent: Nixon Peabody LLP

20100142579 - Resonator of hybrid laser diode: Provided is a resonator of a hybrid laser diode. The resonator includes: a substrate including a semiconductor layer where a hybrid waveguide, a multi-mode waveguide, and a single mode waveguide are connected in series; a compound semiconductor waveguide, provided on the hybrid waveguide of the semiconductor layer, having a tapered... Agent: Ampacc Law Group

20100142581 - Contact pads on arrays of optical devices: A monolithic laser array (30) has a plurality of parallel laser elements (31-1, 31-2 . . . 31-16) configured such that there is significantly reduced bond pad metallization area and drive contact metallization area between adjacent pairs of laser elements. Each laser element has a waveguide (33) extending along its... Agent: Momkus Mccluskey, LLC

20100142582 - Gas discharge laser chamber: One aspect of the disclosed subject matter describes a gas discharge laser chamber. The gas discharge laser chamber includes a discharge region formed between a first electrode and a second electrode, a tangential fan for circulating gas through the discharge region, wherein the fan is proximate to an input side... Agent: Cymer Inc./mpg, LLP

20100135337 - Methods and apparatus for generating terahertz radiation: Apparatus and methods for generating radiation via difference frequency generation (DFG). In one exemplary implementation, a quantum cascade laser (QCL) has a significant second-order nonlinear susceptibility (χ(2)) integrated in an active region of the QCL. The QCL is configured to generate first radiation at a first frequency ω1, second radiation... Agent: Wolf Greenfield & Sacks, P.C.

20100135338 - Device for generation of tunable light pulses: A device for generating light pulses includes a seed laser source for generating input light pulses. An optical pre-amplifier having variable gain receives the input light pulses from the seed laser source. An optical power amplifier receives the light pulses from the optical pre-amplifier and amplifies and compresses the received... Agent: Collard & Roe, P.C.

20100135340 - Fiber laser having superior resistance to reflection light: An MO-PA fiber laser having a master oscillator; and a first power amplifier which uses as a gain medium, a rare earth-doped optical fiber which is connected to a later stage of the master oscillator, wherein the MO-PA fiber laser has a wavelength conversion portion between the master oscillator and... Agent: Sughrue Mion, PLLC

20100135339 - High power fiber laser system with cladding light stripper: A powerful fiber laser system is configured with at least one gain block. The gain block includes an input fiber guiding a pump light, a multiclad active fiber receiving the pump light so that a major portion is absorbed in the core of the active fiber while a minor portion... Agent: Ipg Photonics Corporation

20100135341 - Multiple output repetitively pulsed laser: A continuously pumped, mode-locked laser is disclosed, which includes a cavity dumper that can remove a constant fraction of the light from the cavity at every 1/f period of time, independent of the time at which the first pulse in a train is initiated. The cavity dumper includes a modulator... Agent: Altera Law Group, LLC

20100135343 - Laser oscillator: A first optical base having a high-reflection mirror and a second optical base having a partial-reflection mirror are arranged in parallel to each other on both sides of an oscillator housing. A guide light source emits a guide light for aligning optical components in an optical path of a laser... Agent: Buchanan, Ingersoll & Rooney PC

20100135342 - System and method for tuning adjusting the central frequency of a laser while maintaining frequency stabilization to an external reference: A method and system for stabilizing a laser to a frequency reference with an adjustable offset. The method locks a sideband signal generated by passing an incoming laser beam through the phase modulator to a frequency reference, and adjusts a carrier frequency relative to the locked sideband signal by changing... Agent: Nasa Goddard Space Flight Center

20100135344 - Controlling second harmonic efficiency of laser beam interactions: A method is provided for controlling second harmonic efficiency of laser beam interactions. A laser system generates two laser beams (e.g., a laser beam with two polarizations) for incidence on a nonlinear crystal having a preferred direction of propagation. Prior to incidence on the crystal, the beams are optically processed... Agent: National Aeronautics And Space Administration Langley Research Center

20100135345 - Wavelength conversion laser device and nonlinear optical crystal used in the same: A wavelength conversion laser device and a nonlinear optical crystal used in the same. The wavelength conversion laser device includes a laser light source for emitting a predetermined wavelength beam, and a laser medium for exciting the predetermined wavelength beam from the laser light source into a fundamental beam. The... Agent: Mcdermott Will & Emery LLP

20100135346 - Integrated optical comb source system and method: The present invention provides a system and method for creating a coherent optical comb comprising a plurality of lasers, each laser providing an optical output channel; means for combining each optical channel output; a modulator for modulating the combined optical channel outputs, to provide a modulated signal; means for feeding... Agent: Knobbe Martens Olson & Bear LLP

20100135347 - Device and method for generating bursts of picosecond optical sub-pulses: A method and device are provided for generating bursts of sub-pulses, preferably in the picosecond range. Seed pulses are first generated, and then phase modulated to spread their spectral profile to several time-dependent spectral components. The phase modulated seed pulses are then spectrally filtered to remove spectral components and retain... Agent: Merchant & Gould PC

20100135348 - Method for improvement of beam quality and wavelength stabilized operation of a semiconductor diode laser with an extended waveguide: A method is disclosed for improving the functionality of a semiconductor diode laser with an extended vertical waveguide, wherein the active medium is located close to the top cladding layer of the waveguide, and the laser aims to emit light in a narrow beam with high brightness and/or to operate... Agent: Ked & Associates, LLP

20100135349 - Nitride semiconductor heterostructures and related methods: Semiconductor structures and devices based thereon include an aluminum nitride single-crystal substrate and at least one layer epitaxially grown thereover. The epitaxial layer may comprise at least one of AlN, GaN, InN, or any binary or tertiary alloy combination thereof, and have an average dislocation density within the semiconductor heterostructure... Agent: Goodwin Procter LLP Patent Administrator

20100135350 - Wavelength stabilized light emitter and system for protecting emitter from backreflected light: A gain module, operative to output a laser light coupled into a laser system, is structured with at least one gain element radiating the laser light and a spectrally-selective element. The spectrally-selective element includes a slab of photosensitive material and two parallel feedback and isolating Bragg mirrors recorded in the... Agent: Ipg Photonics Corporation