Coherent light generators inventions 12/07

20070297463 - Wavelength conversion apparatus and two-dimensional image display apparatus: A wavelength conversion apparatus capable of stably providing high output harmonic laser light is provided. The wavelength conversion apparatus comprises an end pump fiber laser 3 containing a laser activating substance, and including a reflecting surface at one end thereof and a fiber grating in the vicinity of the reflecting... Agent: Wenderoth, Lind & Ponack L.L.P.

20070297464 - Mode-locked laser device: A mode-locked laser device includes a Fabry-Perot resonator, a mode-locking element disposed within the resonator, a solid-state laser medium disposed within the resonator, and exciting means for applying excitation light to the solid-state laser medium. The opposite ends of the resonator, the mode-locking element and the solid-state laser medium are... Agent: Sughrue Mion, PLLC

20070297466 - Vacuum cell for optical components: A moisture sensitive optically nonlinear crystal is enclosed in a hermetically sealed elongated vacuum cell. The vacuum cell has an input window at one end and an output window at an opposite end providing optical access to the crystal by a laser beam. The windows are attached to the cell... Agent: Stallman & Pollock LLP

20070297467 - Bandwidth control device: A method and apparatus is disclosed for operating a laser output light beam pulse line narrowing mechanism that may comprise a nominal center wavelength and bandwidth selection optic; a static wavefront compensation mechanism shaping the curvature of the selection optic; an active wavefront compensation mechanism shaping the curvature of the... Agent: William C. Cray Cymer, Inc.

20070297471 - Laser scanning device and image forming device including the laser scanning device: A laser scanning device and an image forming device including the laser scanning device are provided. The laser scanning device includes: a laser diode (LD) driver arranged to control a driving signal supplied to a laser diode (LD); and a power source unit arranged to delay a current supplied from... Agent: Stein, Mcewen & Bui, LLP

20070297480 - Mastering tools and systems and methods for forming a cell on the mastering tools: Mastering tools and systems and methods for forming a cell on the mastering tools are provided. An exemplary method includes emitting a first laser light pulse from a laser for a first predetermined time interval such that at least a portion of the first laser light pulse forms the cell... Agent: Cantor Colburn, LLP

20070297481 - Laser device and optical amplifier: Laser light emission across a wide bandwidth emission spectrum is enabled in a laser device equipped with solid gain media. The laser device is equipped with: a resonator; a plurality of solid gain media, having fluorescent spectra that at least partially overlap with each other, provided within the resonator; and... Agent: Sughrue Mion, PLLC

20070297482 - Multi-wavelength pump method for improving performance of erbium-based lasers: A method for increasing the efficiency of generating lasers by pumping two separate wavelengths into an erbium-based medium to populate the 4I11/2 state and depopulate the 4I13/2 state. A first excitation wavelength region is located between approximately 955 nm to approximately 1100 nm. The second excitation wavelength region is located... Agent: Cislo & Thomas, LLP

20070297484 - Surface-emitting type semiconductor laser: where λ is a design wavelength of the surface-emitting type semiconductor laser, in is a positive integer, dD is a thickness of the unit multilayer film, nD is a mean refractive index of the unit multilayer film, dA is a thickness of the active layer, and nA is a mean... Agent: Oliff & Berridge, PLC

20070297462 - Cascaded cavity silicon raman laser with electrical modulation, switching, and active mode locking capability: A silicon Raman laser that can be electrically switched or modulated and which demonstrates active mode-locking capabilities. The laser can be used with a more traditional glass fiber cavity, or can be fabricated on a single chip with a cavity, or a cascaded cavity, in which the chip fabrication is... Agent: John P. O'banion O'banion & Ritchey LLP

20070297465 - Laser light source: A laser light source is disclosed consisting of first and second lasers that respectively generate laser beams of wavelengths λ1 and λ2. Wavelength λ1 is in the range of 0.9-1.0 μm. A nonlinear optical crystal uses the laser beams of wavelengths λ1 and λ2 as inputs, and outputs a coherent... Agent: Workman Nydegger

20070297468 - Control circuit for optoelectronic module with integrated temperature control: A microprocessor is used to control the temperature of a laser emitter and thereby regulate the wavelength of optical signals from the laser. A serial interface in the microprocessor provides input and output lines to a host device, and temperature lookup tables are stored in nonvolatile memory. Control logic processes... Agent: Workman Nydegger

20070297469 - Cryogenically cooled solid state lasers: Methods and constructions for cryogenically cooled solid state lasers are provided that allow the cooling channels to be embedded within the buffer heat sinks used to conductively cool the laser medium. Several gain medium geometries are disclosed that are compatible with efficient and straight forward cryogenic cooling techniques using practical... Agent: Brown & Michaels, PC 400 M & T Bank Building

20070297470 - Solid-state laser apparatus: In the solid-state laser apparatus 1, a main pipe 11 for circulating a coolant through a solid-state laser medium 3 is provided with a heat exchanger 14, whereby the laser medium 3 is prevented from raising its temperature. When the coolant becomes acidic or alkaline, a controller 24 controls a... Agent: Drinker Biddle & Reath (dc)

20070297472 - Laser driver circuit able to compensate a temperature dependence of the laser diode: The present invention provides a laser diode driving circuit able to reduce the degradation of the optical output from the laser diode even when the characteristic of the laser diode widely scatters. The circuit provides a filter circuit connected in parallel to the laser diode that compensates the frequency dependence... Agent: Smith, Gambrell & Russell

20070297473 - Semiconductor laser device: The present invention relates to a semiconductor laser apparatus having a metal body which efficiently cools a semiconductor laser element, in which joining of copper-made members coated with DLC layers and prevention of corrosion in the vicinity of joined portions are possible. The semiconductor laser apparatus has a metal body... Agent: Drinker Biddle & Reath (dc)

20070297474 - Semiconductor light-emitting device: A semiconductor light-emitting device including an active layer is provided. The light-emitting device includes an active layer between an n-type semiconductor layer and a p-type semiconductor layer. The active layer includes a quantum well layer formed of Inx1Ga(1−x1)N, where 0<x1≦1, barrier layers formed of Inx2Ga(1−x2)N, where 0≦x2<1, on opposite surfaces... Agent: Harness, Dickey & Pierce, P.L.C

20070297475 - Semiconductor optical device and optical transmission module: A semiconductor optical device has a semiconductor laser portion and a modulator portion which have different mesa structures. The mesa structure of the semiconductor laser portion is a ridge waveguide structure which has air around the mesa. The mesa structure of the modulator portion is a planarized ridge waveguide structure... Agent: Mattingly, Stanger, Malur & Brundidge, P.C.

20070297476 - Nitride semiconductor laser element: A nitride semiconductor laser element includes a lower clad layer, a lower adjacent layer, a quantum well active layer, an upper adjacent layer and an upper clad layer in this order. The quantum well active layer includes a plurality of well layers formed of undoped InGaN, and an undoped barrier... Agent: Harness, Dickey & Pierce, P.L.C

20070297477 - Spectral-narrowing diode laser array system: A system to increase the brightness of, and control gaps in, the light from an external cavity, spectrally narrowed, stack of diode laser bars employing a stepped mirror and transparent plates in the external cavity.... Agent: Devine, Millimet & Branch, P.A.

20070297478 - Gas laser oscillator and gas laser beam machine: A pressure of a laser gas in an enclosure (7) is detected by a gas pressure sensor (12), and a pressure comparison circuit (13) determines whether the thus-detected pressure is normal or anomalous. An electric current output from an inverter (10) that drives a blower (5) to cause a laser... Agent: Sughrue-265550

20070297479 - Triggered spark gap: A spark gap discharger includes a barrier structure having elements that reduce or prevent the buildup of a conductive surface path between electrodes due to the deposition of ablated electrode material on the inner walls of the spark gap chamber. The insulator body structure of the spark gap discharger includes... Agent: Townsend And Townsend And Crew, LLP

20070297483 - Two-stage laser system for aligners: The invention relates to a two-stage laser system well fit for semiconductor aligners, which is reduced in terms of spatial coherence while taking advantage of the high stability, high output efficiency and fine line width of the MOPO mode. The two-stage laser system for aligners comprises an oscillation-stage laser (50)... Agent: Patenttm.us

20070291799 - High power laser device: The invention is a single-crystal passively mode-locked semiconductor vertical-external-cavity surface-emitting laser (VECSEL). The device can be a single emitter or an array of emitters. The VECSEL structure is grown on a GaAs, InP or GaSb substrate. The device consists of an active region with a number of quantum wells (QW)... Agent: Perman & Green

20070291801 - Optically pumped semiconductor laser pumped optical parametric oscillator: An optically pumped semiconductor pumped optical parametric oscillator (OPS-pumped OPO) includes an OPS laser resonator and an OPO resonator A portion the OPS laser resonator axis and the OPO resonator axis are collinear. An optically nonlinear crystal is located in the coaxial portion of the resonators and arranged to frequency... Agent: Stallman & Pollock LLP

20070291802 - Optical disk apparatus and information recording method: In an optical disk apparatus, by obtaining the temperature in the vicinity of a laser in the apparatus, the power source voltage of the laser driver is controlled such that power consumed by the headroom of the laser driver is reduced to the maximum extent without deteriorating the current drive... Agent: Townsend And Townsend And Crew, LLP

20070291805 - Optoelectronic device and method of making same:

20070291806 - Variable resistance circuit and light source control device using the same: A variable resistance circuit comprises an input terminal, an output terminal, and a variable resistance module. The variable resistance is connected between the input terminal and the output terminal. The variable resistance module comprises a resistance network including at least one resistor and an interface including a plurality of contacts.... Agent: PCe Industry, Inc. Att. Cheng-ju Chiang Jeffrey T. Knapp

20070291808 - Electrooptically bragg-reflector stopband-tunable optoelectronic device for high-speed data transfer: A device contains at least one wavelength-tunable multilayer interference reflector controlled by an applied voltage and at least one cavity. The stopband edge wavelength of the wavelength-tunable multilayer interference reflector is preferably electrooptically tuned using the quantum confined Stark effect in the vicinity of the cavity mode (or a composite... Agent: Vitaly Shchukin

20070291809 - Semiconductor optical device and manufacturing method thereof: The object of the invention is to reduce the deterioration of crystallinity in the vicinity of an active layer when C, which is a p-type dopant, is doped and to suppress the diffusion of Zn, which is a p-type dopant, into an undoped active layer, thus to realize a sharp... Agent: Antonelli, Terry, Stout & Kraus, LLP

20070291810 - Low speckle noise monolithic microchip rgb lasers: A method for reducing speckle noise of a monolithic microchip laser with intracavity beam combining and sum frequency mixing is based on time averaging of uncorrelated speckle patterns generated from a large number of independent longitudinal modes and comprises schemes including selection of gain media and nonlinear optical materials to... Agent: Pavilion Integration Corporation

20070291811 - Entangled photon source: A system for and method of efficiently generating high-intensity entangled photons are disclosed. The system and method may advantageously use an optical ring cavity that is resonant in the frequency of a pump light beam.... Agent: Hunton & Williams LLP Intellectual Property Department

20070291798 - Laser assembly for use with a microscope: A laser assembly is provided which includes an objective assembly having an objective and a dichroic mirror, a collimating assembly having a collimating lens and a selectively displaceable mount, and a laser supply assembly having a laser source. The laser assembly can provide laser light through the collimating lens, which... Agent: Stroock & Stroock & Lavan LLP

20070291800 - Liquid crystal polymer optical filter carrier: An external cavity laser apparatus includes a wavelength tuning element mounted to a carrier on the apparatus's platform. Thermal control of the platform sets an initial position of the carrier and tuning element, from which independent tuning of the element can be achieved for wavelength tuning. The carrier is formed... Agent: Marshall, Gerstein & Borun LLP (intel)

20070291803 - Active gas cooling for emitter bars: Methods and devices for cooling an emitter bar or stacked array of emitter bars utilizing the flow of gas through cooling channels of a heat sink housing. Some embodiments may include baffle members in the cooling channels to increase the efficiency of heat transfer from the heat sink housing to... Agent: Grant Anderson LLP C/o Portfolioip

20070291804 - Compact mid-ir laser: A compact mid-IR laser device utilizes a quantum cascade laser to provide mid-IR frequencies suitable for use in molecular detection by signature absorption spectra. The compact nature of the device is obtained owing to an efficient heat transfer structure, the use of a small diameter aspheric lens and a monolithic... Agent: Foley & Lardner

20070291807 - Optical transmitter with a shunt driving configuration and a load transistor operated in common gate mode: The invention provides an optical transmitter that prevents the high frequency components in the driving signal from leaking to the external power supply in a wider frequency range. The transmitter provides a shun driving configuration with a switching transistor connected in parallel to the laser diode and a load transistor... Agent: Smith, Gambrell & Russell

20070291812 - Segmented diode laser system: Disclosed is a laser system that comprises a laser source adapted to emit a laser beam, wherein the laser source comprises a plurality of emitters for emitting respective beam contributions to the emitted laser beam; and first and second feedback means adapted to provide optical feedback to respective first and... Agent: Finnegan, Henderson, Farabow, Garrett & Dunner LLP

20070291813 - Coupling devices and methods for stacked laser emitter arrays: Methods and devices for coupling the output light energy of one or more stacked laser emitter bar arrays using a beam interleaver and beam combiner to achieve high brightness and coupling efficiency. Some embodiments may include wavelength control devices and methods such as VIGs and the like.... Agent: Grant Anderson LLP C/o Portfolioip

20070286247 - Frequency-doubled laser resonator including two optically nonlinear crystals: An intracavity frequency-doubled includes a laser resonator including at least one gain element and two optically nonlinear crystals. The two optically nonlinear crystals independently double the frequency of fundamental radiation in the resonator. In one example the crystals are arranged to generate two frequency-doubled beams that are orthogonally plane-polarized with... Agent: Stallman & Pollock LLP

20070286248 - Nonlinear optical modulator: A nonlinear optical modulator includes a resonator having an input mirror and an output mirror; a gain medium provided between the input mirror and the output mirror which generates a fundamental wave using light; a nonlinear material provided between the gain medium and the output mirror which generates a predetermined... Agent: Sughrue Mion, PLLC

20070286249 - Optical device: An optical device includes: a surface-emitting type semiconductor laser section; at least one isolation section formed above the surface-emitting type semiconductor laser section; and a photodetector section formed above the isolation section, wherein the surface-emitting type semiconductor laser section includes a first mirror, an active layer formed above the first... Agent: Oliff & Berridge, PLC

20070286250 - Active layer of laser diode: An active layer of a laser diode comprises: a plurality of quantum well layers; a plurality of quantum barrier layers formed between the quantum well layers; and a plurality of tensile-stressed GaInP layers formed between the quantum barrier layers, whereby the lateral flow of electron-hole pairs in the active layer... Agent: Troxell Law Office PLLC Suite 1404

20070286251 - Optical switch structure: A structure of an optical switch makes the optical switch capable of receiving broadband signals. And the manufacturing procedure is simplified.... Agent: Troxell Law Office PLLC

20070286252 - Submount of a multi-beam laser diode module: Example embodiments may provide a submount in to which a multi-beam laser diode may be flip-chip bonded and a multi-beam laser diode module including the submount. The submount may include a first submount and a second submount. The first submount may include a first substrate, a plurality of first solder... Agent: Harness, Dickey & Pierce, P.L.C

20070280304 - Hollow core fiber laser: A laser includes a optical fiber having a cladding that defines a core, a laser active medium within the core of the optical fiber, a first reflector and a second reflector defining a cavity within at least a portion of the optical fiber; and an excitation system coupled to the... Agent: Fish & Richardson PC

20070280305 - Q-switched cavity dumped laser array: A microchip, Q-switched, cavity-dumped laser is end-pumped by VCSEL or a laser diode and comprises an electro-optic Q-switch mechanism actively controlled by photoconductive switches. The fast response time of the system and its small dimension produce short pulses (ten pico-second range), with high energy (uJ range). The microchip structure may... Agent: Bingham Mccutchen LLP

20070280307 - Semiconductor laser device: A semiconductor laser device for emitting light at two wavelengths λ1 and λ2 comprises: a laser chip having a front end face and a rear end face; and a high reflectance film on the rear end face of the laser chip and including seven or more layers laminated one on... Agent: Leydig Voit & Mayer, Ltd

20070280309 - Optical waveguide with single sided coplanar contact optical phase modulator: An apparatus and method for high speed phase modulation of optical beam. For one embodiment, an apparatus includes an optical waveguide having adjoining first and second regions disposed in semiconductor material. The first and second regions have opposite first and second doping types, respectively. First, second and third higher doped... Agent: Blakely Sokoloff Taylor & Zafman

20070280310 - Laser intra-cavity electronic wavelength tuner: An apparatus for adjusting the wavelength of a laser capable of lasing at multiple wavelengths by using a single acousto-optical modulator and a pair of optical reflectors inside a laser cavity. By adjusting the frequency and amplitude of the radio-frequency source to the acousto-optical modulator, undesired wavelengths are suppressed in... Agent: Wildman Harrold Allen & Dixon LLP And The Boeing Company

20070280311 - Device and method to create a low divergence, high power laser beam for material processing applications: A thin beam laser crystallization apparatus for selectively melting a film deposited on a substrate is disclosed having a laser source producing a pulsed laser output beam, the source having an oscillator comprising a convex reflector and a piano output coupler; and an optical arrangement focusing the beam in a... Agent: Matthew K. Hillman Cymer, Inc., Legal Dept.

20070280314 - Integrated circuit for driving a light source: An integrated circuit is provided for driving a light source. The light source outputs light. A light receiver receives part of the light output from the light source. In response to a detection current from the light receiver, an automatic power controller adjusts an operating current of the light source.... Agent: Cha & Reiter, LLC

20070280315 - Laser driving circuit, optical pickup and recording/reading equipment: Disclosed is a laser driving technique capable of reducing power consumption in a laser driving circuit to achieve reduced heat generation in an optical pickup of a recording/reading equipment for an optical disc. A base-voltage control circuit is connected to a base of a grounded-base cascode transistor connected between a... Agent: Ratnerprestia

20070280313 - Method and apparatus for driving a light emitting device: A method for driving a light emitting device includes providing a first current source coupled to an input terminal of the light emitting device, and providing a second current source coupled to an output terminal of the light emitting device.... Agent: North America Intellectual Property Corporation

20070280319 - Laser device: A laser device including a gain medium that has a gain, a waveguide for propagating an electromagnetic wave, and a resonant structure comprised of the waveguide. The gain medium extends in the propagation direction, and is sandwiched, at the top and bottom surfaces in the thickness direction thereof, between a... Agent: Fitzpatrick Cella Harper & Scinto

20070280321 - Distributed feedback laser diode: A distributed feedback laser diode comprises a phase-shifting portion in diffraction gratings. The magnitude of a phase shift in the phase-shifting portion is 8 Λ/40 to 9 Λ/40, Λ representing twice the distance between the diffraction gratings. A main mode stands on a lower wavelength side than the center of... Agent: Sughrue Mion, PLLC

20070280323 - Chamber for a high energy excimer laser source: A chamber for a gas discharge laser is disclosed and may include a chamber housing having a wall, the wall having an inside surface surrounding a chamber volume and an outside surface, the wall also being formed with an orifice. For the chamber, at least one electrical conductor may extend... Agent: Matthew K. Hillman Cymer, Inc., Legal Dept.

20070280324 - Laser apparatus for generating high energy pulses of short duration, and process for generating said laser pulse: The laser apparatus for generating high energy pulses of short duration comprises a pumping laser source and a miniaturized cavity defined by a pair of mirrors in which an active crystal and an absorber are housed. The active crystal presents a gain greater than 10 dB in double pass, said... Agent: Ladas & Parry

20070280325 - Multimode mopa with thermal lens compensation: A master oscillator power amplifier (MOPA) laser system includes a symmetrical master oscillator and an amplifier each having an optically pumped solid-state gain rod. An optical relay is located between the laser resonator and the amplifier gain rod. When the oscillator and amplifier gain media are equally optically pumped, the... Agent: Stallman & Pollock LLP

20070280303 - Invention concerning emitter of electromagnetic radiation, as well as methods for the generation of population inversions in said emitter elements: A new method for the generation of populations in exciton-p-states is proposed, and, thus, a method for the generation of population inversions of excitons, i.e. between their energetically spaced states in materials, in which excitons (bound electron-hole pairs) can be generated. Furthermore, emitter elements in the form of lasers or... Agent: Clark & Brody

20070280306 - Laser device, control device of laser device, method of controlling laser device, method of tuning wavelength of laser device and control data of laser device: A laser device includes a cavity and a control portion. The cavity has an optical amplifier, a wavelength selectable portion having a changeable transmission wavelength range, and a mirror. The control portion controls the wavelength selectable portion so that the transmission wavelength range of the wavelength selectable portion is changed... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20070280308 - High power excimer laser with a pulse stretcher: An apparatus and method is disclosed which may comprise a high power excimer or molecular fluorine gas discharge laser DUV light source system which may comprise: a pulse stretcher which may comprise: an optical delay path mirror, an optical delay path mirror gas purging assembly which may comprise: a purging... Agent: William C. Cray Cymer, Inc., Legal Dept.

20070280312 - Oscillatory system and method for controlling an scillatory system of this type: The invention relates to a method for controlling an oscillatory system with the aid of at least one measured variable by the detection of at least one oscillation component (Sx(t)) over time (t) in the form of at least one measured variable. According to said method a control variable (δu)... Agent: Whitham, Curtis & Christofferson & Cook, P.C.

20070280316 - Laser diode driving apparatus: A laser diode driving apparatus comprising an oscillator (11) for generating a high-frequency signal; an amplifier (12) for amplifying the high-frequency signal and outputting the amplified high-frequency signal; current mirror circuits (7, 8 and 9) for receiving the output current of the amplifier (12) and driving multiple laser diodes (1,... Agent: Ratnerprestia

20070280317 - Composite laser rod,fabricating method thereof, and laser device therewith: As a composite laser rod capable of satisfying the positional stability and output stability of a laser beam, a laser rod in which a laser active element is doped is intimately inserted into a hollow portion of a non-doped ceramic pipe that has a crystal structure the same as the... Agent: Sughrue Mion, PLLC

20070280318 - Semiconductor laser device and manufacturing method thereof: A semiconductor laser device (1) includes: a substrate (3) having a principal plane (3a); a photonic crystal layer (7) having an epitaxial layer (2a) of gallium nitride formed on substrate (3) in a direction in which principal plane (3a) extends and a low refractive index material (2b) having a refractive... Agent: Fish & Richardson P.C.

20070280320 - Electrically-pumped (ga,in,al)n vertical-cavity surface-emitting laser: A vertical-cavity surface-emitting laser (VCSEL) comprising a low-loss thin metal contact and current spreading layer within the optical cavity that provides for improved ohmic contact and lateral current distribution, a substrate including a plano-concave optical cavity, a (Ga,In,Al)N multiple quantum well (MQW) active region contained within the optical cavity that... Agent: Gates & Cooper LLP Howard Hughes Center

20070280322 - 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, P.C.

20070280326 - External cavity laser in thin soi with monolithic electronics: An ECL laser structure utilizes an SOI-based grating structure coupled to the external gain medium to provide lasing activity. In contrast to conventional Bragg grating structures, the grating utilized in the ECL of the present invention is laterally displaced (i.e., offset) from the waveguide (in most cases, a rib or... Agent: Wendy W. Koba, Esq.