Coherent light generators inventions 02/09

20090052475 - Fiber laser device for neutralizing unexploded ordinance: A device for directing a beam of radiation at a target. The device includes a fiber laser for producing the beam of radiation, an aiming mechanism, for aiming the beam of radiation at the target, that moves independently of the fiber laser, and an optical fiber for conveying the beam... Agent: Dr. Mark M. Friedman C/o Bill Polkinghorn - Discovery Dispatch

20090052477 - Nonlinear polarization pulse shaping mode locked fiber laser: A fiber laser cavity that includes a laser gain medium for receiving an optical input projection from a laser pump. The fiber laser cavity further includes a positive dispersion fiber segment and a negative dispersion fiber segment for generating a net negative dispersion for balancing a self-phase modulation (SPM) and... Agent: Xin Wen

20090052476 - Optical fiber for an optical fiber laser, method for fabricating the same, and optical fiber laser: The optical fiber 1 for an optical fiber laser is provided with a rare earth element doped core 2 doped with a rare earth element, a cladding 3 formed at an outer periphery of the rare earth element doped core 2, a core vicinity part 3′ of the cladding 3... Agent: Mcginn Intellectual Property Law Group, PLLC

20090052478 - Beam director flow control: Systems and methods are described for controlling flow disturbances emanating from a protrusion, such as a beam propagating device. In one embodiment, a method includes positioning a flow control element at least partially around a base portion of a protrusion, wherein the flow control element includes at least one flow... Agent: Lee & Hayes, PLLC

20090052479 - Saturable absorber structure: The invention relates to a saturable absorber structure (10) with multiple-layer epitaxial heterostructure absorbers. Typically the structure comprises first absorber layers of a quantum well semiconductor QW-material, which has a nonlinearly on radiation intensity dependent optical absorption; first contacting layers of a first optically transparent semiconductor material against a surface... Agent: Nixon & Vanderhye, PC

20090052480 - Laser pulse conditioning: A light pulse conditioning apparatus has at least first and second curved reflective surfaces that share a common focus and a light-redirecting element disposed between the first and second curved reflective surfaces to redirect at least a portion of an incident light beam toward the second curved reflective surface as... Agent: Corning Incorporated

20090052481 - Laser light source device and image generating device using same: Disclosed herein is a laser light source device including a pumping light source; a pair of resonator mirrors; a laser medium and a wavelength converting element within a resonator formed by the resonator mirrors; the laser medium being pumped by light in a transverse multi-mode pattern, the wavelength converting element... Agent: Robert J. Depke Lewis T. Steadman

20090052482 - Cooling an active medium using raman scattering: A method is described for setting up a system comprising an active medium. The method comprises thermally controlling the system comprising an active medium by radiative cooling. The radiative cooling thereby is based on stimulated and/or coherent Raman scattering processes. In particular embodiments, the thermally controlling may be obtained by... Agent: Bacon & Thomas, PLLC

20090052483 - Optoelectronic semiconductor package and method for attaching heat dissipation element thereto: An optoelectronic semiconductor package for packaging a heat source capable of emitting light includes a base, a seal member, and a plurality of heat-dissipation elements. The base carries and touches the heat source and has a plurality of openings formed thereon, and the seal member is used to seal the... Agent: Muncy, Geissler, Olds & Lowe, PLLC

20090052484 - Magneto-optoelectronic switch and sensor: A Magneto-Optoelectronic Device MOD (10) includes a magnetic sensing device (12), such as a magnetoresistive device or a magnetic tunnel junction device, that is combined with a semiconductor light emitter (14), such as a LED or a laser diode, to create a compact integrated device where changes in an ambient... Agent: Harrington & Smith, PC

20090052485 - Laser driving circuit: A purpose of this invention is to suppress radiation noise while satisfying demands for higher speeds and higher image qualities of a semiconductor laser driving device in a laser beam printer or the like. A laser driving circuit includes a first wiring pattern and a second wiring pattern which are... Agent: Fitzpatrick Cella Harper & Scinto

20090052486 - Laser apparatus and production method of laser apparatus: Provided are a laser apparatus into which a large current can be injected and a production method which enables easy production of the apparatus. A laser apparatus includes a light-emitting region on a substrate, and a periodic refractive index structure containing an i-type material provided at a periphery of the... Agent: Fitzpatrick Cella Harper & Scinto

20090052487 - Optical semiconductor device: An optical semiconductor device includes an active layer, a first semiconductor layer formed above the active layer and made from a semiconductor material containing Al, a second semiconductor layer formed above the first semiconductor layer and made from a semiconductor material which does not contain any one of Al and... Agent: Westerman, Hattori, Daniels & Adrian, LLP

20090052488 - Quantum cascade laser element: A DFB quantum cascade laser element that can reliably CW-oscillate a single-mode light even at room temperature or a temperature in proximity thereof is provided. In a quantum cascade laser element 1, a top-grating approach for which a diffraction grating 7 is formed on a laminate 3 is adopted, and... Agent: Drinker Biddle & Reath (dc)

20090052489 - Nitride-based semiconductor laser device and method of manufacturing the same: A nitride-based semiconductor laser device includes a front facet located on a forward end of an optical waveguide and formed by a substantially (000-1) plane of a nitride-based semiconductor layer and a rear facet located on a rear end of the optical waveguide and formed by a substantially (0001) plane... Agent: Ditthavong Mori & Steiner, P.C.

20090052490 - Laser diode array, method of manufacturing same, printer, and optical communication device: A method of manufacturing a laser diode array capable of inhibiting electric cross talk is provided. The method of manufacturing a laser diode array includes a processing step of forming a peel layer containing an oxidizable material and a vertical resonator structure over a first substrate sequentially from the first... Agent: Rader Fishman & Grauer PLLC

20090052491 - Organic laser apparatus: The invention is an organic laser apparatus including an organic compound that radiates laser light when current is injected. In an organic compound layer employed for the laser apparatus of the invention, a laminated structure and film thickness of each layer are determined in consideration of wavelength so as to... Agent: Eric Robinson

20090052492 - Optical pickup and optical disc device: An optical pickup according to the present invention includes an integrated circuit element (LDD) 5 for driving first, second, and third semiconductor lasers 3, 4, and 5. The LDD 50 is shaped so as to have a rectangular principal face surrounded by one side, with a plurality of input/output pins... Agent: Mark D. Saralino (pan) Renner, Otto, Boisselle & Sklar, LLP

20090052493 - Active element for laser source and laser source including such an active element: According to the invention, the lateral surface (5) of the doped bar (2) comprises at least one dull-ground diffusing zone (19) able to interrupt the paths of the spurious laser modes.... Agent: Dickinson Wright PLLC James E. Ledbetter, Esq.

20090046746 - Pulsed fiber laser: A fiber laser system includes a master oscillator configured to generate linear polarized infrared laser radiation with wavelengths of 1015-1085 nm, pulses with durations of 100 ps to 10 ns, pulse train repetition rates of 1 kHz to 10 MHz, spectral bandwidth less than 0.5 nm, and a predominately single... Agent: Townsend And Townsend And Crew, LLP

20090046747 - External cavity for generating a stimulus signal and filtering a response signal received from a dut: Deriving an optical property of a device under test includes generating a cavity light beam along a first optical path in external cavity, selecting a wavelength of the cavity light beam of light by means of a filter arrangement within the external cavity, providing an optical stimulus signal to a... Agent: Agilent Technologies Inc.

20090046748 - Light-emitting device with precisely tuned and narrowed spectral width of optical output and an optical signal source providing the same: A light-emitting device whose output wavelength is easily variable is disclosed. The device provides a light-generating portion that emits light by the carrier injection and a variable wavelength filter that sets a specific wavelength λr. The variable wavelength filter includes two ring waveguide optical coupled with each other and having... Agent: Smith, Gambrell & Russell

20090046749 - Coherent light source: A coherent light source is provided with a light source unit for projecting a fundamental wave having a first wavelength, and a wavelength converting unit for projecting a second harmonic wave of the fundamental wave at a prescribed average power or more by receiving the fundamental wave. The coherent light... Agent: Wenderoth, Lind & Ponack L.L.P.

20090046750 - Increased nanosecond laser pulse-to-pulse energy repeatability using active laser pulse energy control: A method and apparatus for reducing the pulse-to-pulse laser energy variation (i.e., increasing the pulse-to-pulse laser energy repeatability) from a pulsed laser source are provided. In this manner, laser pulses impingent on a processing plane, such as the surface of a wafer or other substrate, may have substantially the same... Agent: Patterson & Sheridan, LLP - - Appm/tx

20090046751 - Method and apparatus for precise control of laser processing of materials: The invention discloses a method and an apparatus for precise control of laser processing specifically for, but not limited to non-metallic substrate materials, said method comprising the steps of reading a constant and unbroken laser beam (4) energy power level from a laser cavity (3), and adjusting and modifying its... Agent: Fraser Clemens Martin & Miller LLC

20090046752 - Gas-cooled laser device: A gas-cooled laser device includes heat dissipative components, and housing walls made of a heat conducting material, in which one or more of the housing walls are provided with ventilation channels. At least one heat dissipative component is mounted on a plate of a heat conducting material, and the heat... Agent: Fish & Richardson PC

20090046753 - Diode lasers type of devices with good coupling between field distribution and gain: Diode lasers type of devices with good coupling between field distribution and gain are disclosed. A single element has a flat field distribution that couples with the uniform current injection in a contact region. A multi element array having almost flat field distribution in each element and almost equal amplitude... Agent: Pyle & Piontek Attn: Thomas R. Vigil

20090046754 - Nitride semiconductor device and method of manufacturing the same: A method of manufacturing a nitride semiconductor device includes the steps of: forming a division guide groove by applying a laser beam having a wavelength and energy density causing multiphoton absorption to a surface of a substrate having a group III nitride semiconductor layer grown on a major surface thereof;... Agent: Rabin & Berdo, PC

20090046755 - Integrated semiconductor laser device and method of fabricating the same: An integrated semiconductor laser device capable of improving the properties of a laser beam and reducing the cost for optical axis adjustment is provided. This integrated semiconductor laser device comprises a first semiconductor laser element including a first emission region and having either a projecting portion or a recess portion... Agent: Mcdermott Will & Emery LLP

20090046756 - Optical systems for microarray scanning: The invention provides a novel optical system for use in a microarray scanner, comprising an aperture-containing reflecting mirror comprising an aperture and a reflecting surface. The aperture of the aperture-containing reflecting mirror allows an excitation light to pass through, and the reflecting surface of the aperture-containing reflecting mirror allows emission... Agent: Morrison & Foerster LLP

20090046757 - Laser irradiation apparatus, laser irradiation method, and manufacturing method of semiconductor device: An object is to provide a laser irradiation apparatus and a laser irradiation method with which positions of crystal grain boundaries generated at the time of laser crystallization can be controlled. Laser light emitted from a laser 101 is modulated into laser light having intensity distribution along a long-axis direction... Agent: Eric Robinson

20090041063 - Fiber laser apparatus: In a fiber laser apparatus that uses a rare earth added fiber as a light amplifying medium of a resonator or amplifier, the rare earth added fiber is a photonic bandgap fiber in which a rare earth element has been added to a core. Moreover, the loss when the rare... Agent: Sughrue Mion, PLLC

20090041062 - Fiber-based tunable laser: A fiber-based tunable laser includes a spectrum-expansion device comprising a micro structured fiber configured to receive a pump laser pulse having a first band width and a first pulse energy, and to produce a spectrally expanded laser pulse having a second band width at least two times broader than the... Agent: Xin Wen

20090041064 - Higher order mode optical fiber laser or amplifier: A method of producing higher power optical energy with an optical fiber can include providing a length of optical fiber having a core constructed so as to support more than one mode at a selected wavelength, the length of optical fiber comprising an active material for providing optical gain at... Agent: Nufern Peter J. Rainville

20090041061 - Method and apparatus for generation and amplification of light in a semi-guiding high aspect ratio core fiber: A planar laser gain medium and laser system. The novel laser gain medium includes an active core having a high aspect ratio cross-section with a fast-axis dimension and a slow-axis dimension, signal claddings adapted to form reflective boundaries at fast-axis boundaries of the core, and a material adapted to minimize... Agent: Raytheon Company Patent Docket Administration

20090041066 - Fast continuously wavelength tuning single frequency fiber laser using tunable polymer optical filters: A method for generating a laser projection by employing a laser gain medium for receiving an optical input projection from a laser pump. The method further includes a step of employing a mode selection filter comprising an electro-optical (EO) tunable layer disposed between two parallel reflection plates for generating a... Agent: Xin Wen

20090041065 - Liquid crystal device: A tuneable laser device comprises first and second cell walls enclosing a layer of a liquid crystal material having a helical axis substantially normal to the inner surfaces of the cell walls in the absence of an applied field. The liquid crystal contains a fluorescent, phosphorescent, luminescent or rare-earth dye.... Agent: O'keefe, Egan, Peterman & Enders LLP

20090041067 - Engineered nonlinear optical crystal composites for frequency conversion: Walk-off corrected (WOC) non-linear optical (NLO) components, devices and systems including one or more engineered WOC NLO crystal doublets. Such systems and devices advantageously increase the efficiency of an OPO operation. Devices are applicable to any uniaxial and biaxial NLO crystals in a wide range of wavelengths, e.g., from far... Agent: Townsend And Townsend And Crew, LLP

20090041068 - Single-frequency monolithic linear laser device and system comprising same: A laser device includes: an amplifying medium (1, 7) adapted to generate a fundamental wavelength laser beam (13); a birefringent non-linear medium (3, 20, 20) for doubling the fundamental wavelength laser beam to generate a harmonic wavelength laser beam (14); a polarizing medium (1b, 5, 6, 2, 8, 9, 16,... Agent: Young & Thompson

20090041069 - Semiconductor laser, light source device, lighting device, projector, and monitor device: A light source device includes a semiconductor laser, and a drive circuit supplying the semiconductor laser with a pulsed drive current, and in the semiconductor laser, a laser emitting element and a free wheel diode are formed on the same substrate, and a cathode of the free wheel diode is... Agent: Oliff & Berridge, PLC

20090041070 - Optical scanning device and component thereof: It includes a laser unit 10 for emitting a light beam, a laser control unit 42 for adjusting the light beam emitted by the laser unit 10, first and second prism units 20 and 30 through which an incident light beam is passed as a scanning beam, an angle between... Agent: Katten Muchin Rosenman LLP

20090041071 - Control circuit for a laser diode and a method to control a laser diode: A control circuit for a laser diode is disclosed, in which the driving current may be suppressed even when the monitor PD breaks down to make the APC feedback control inoperable. The control circuit comprises an LD driver to supply the driving current to the LD, a monitor PD to... Agent: Venable LLP

20090041072 - Optical communication module and output control method of semiconductor laser: An optical communication module includes a semiconductor laser drive circuit configured to supply a drive current to a semiconductor laser so as to output a laser beam; a drive control section configured to control the semiconductor laser drive circuit based on an ambient temperature of the semiconductor laser such that... Agent: Nec Corporation Of America

20090041073 - Dbr laser with improved thermal tuning efficiency: A distributed Bragg reflector (DBR) includes a base substrate and a gain medium formed on the base substrate. A waveguide positioned above the base substrate in optical communication with the gain medium and defines a gap extending between the base substrate and the waveguide along a substantial portion of the... Agent: Workman Nydegger 1000 Eagle Gate Tower

20090041074 - Passivation of vertical cavity surface emitting lasers: A vertical cavity surface emitting laser including a substrate, a plurality of epitaxial layers formed on the substrate as an epitaxial stack, and a passivation layer at least partly covering the epitaxial stack including a plurality of sublayers at least some of which are composed of different materials. The composition... Agent: Casey Toohey Emcore Corporation

20090041075 - Surface-emitting type semiconductor optial device and method for manufacturing a surface-emitting type semiconductor optical device: A surface-emitting type semiconductor optical device includes: a first DBR portion of a first conductivity type provided on a GaAs substrate of the first conductivity type; an active layer provided on the first DBR portion; a second DBR portion provided on the active layer; a mesa-shaped conductive layer, which is... Agent: Smith, Gambrell & Russell

20090041076 - Opto-semiconductor devices: An opto-semiconductor device. An opto-semiconductor element includes a semiconductor substrate, a multilayered semiconductor layer formed on a first surface of the semiconductor substrate and having a resonator, a first electrode with multiple conductive layers formed on the multilayered semiconductor layer, and a second electrode formed on a second surface of... Agent: Stanley P. Fisher Reed Smith Hazel & Thomas LLP

20090041077 - Optical read-out: An arrangement for read-out of information from an optical information carrier is disclosed. The system comprises a VCSEL for improving the signal-to-noise ratio of light reflected from and modulated by an information carrier. The VCSEL has a substrate that transmits the emission from the active regions of the VCSEL. Thereby,... Agent: Philips Intellectual Property & Standards

20090034561 - Backward stimulated rayleigh-bragg scattering devices based on multi-photon absorbing materials and their applications: The present invention relates to a method and system of generating backward stimulated Rayleigh-Bragg scattering by focusing activating radiation through a multi-photon absorbing dye solution, thereby producing coherent output radiation with no measured frequency shift and measured pump threshold values independent of the spectral line width of the input activating... Agent: Nixon Peabody LLP - Patent Group

20090034562 - Visible continuum generation utilizing a hybrid optical source: An all-fiber supercontinuum source is formed as a hybrid combination of a first section of continuum-generating fiber (such as, for example, highly-nonlinear fiber (HNLF)) spliced to a second section of continuum-extending fiber (such as, for example, photonic crystal fiber (PCF)). The second section of fiber is selected to exhibit an... Agent: Wendy W. Koba, Esq.

20090034563 - Tunable diode laser system with external resonator: A tunable diode laser system with external resonator in Littrow or Littman configuration has an optical lattice on which the light beam from a laser diode is diffracted, a support element to hold the lattice or to hold a mirror, which reflects the light diffracted by the lattice, and an... Agent: Collard & Roe, P.C.

20090034564 - Method and apparatus for detecting and avoiding multiple-pulse states in ultra-short-pulse laser: In a detection method for undesired double- or multiple-pulse states in an ultra-short-pulse laser system operated in the soliton regime and intended for generating femtosecond or picosecond pulses, comprising an amplifying laser medium for producing a laser emission, a laser resonator having at least one resonator mirror and a pump... Agent: Oliff & Berridge, PLC

20090034565 - Current drive circuit: A current drive circuit according to the present invention includes: a first current source and a second current source (I101, I102); a first current mirror (CM103) for generating a first mirror current of a current (I2) generated by the second current source (I102); a second current mirror (CM106) for generating... Agent: Sughrue Mion, PLLC

20090034566 - Photonic crystal laser: One objective of the present invention is to provide a laser device which is capable of scanning beams of a laser light of high output power at a high speed without using mechanical scanning mechanisms. A plurality of the upper electrodes 33 is linearly arranged in the photonic crystal laser... Agent: Oliff & Berridge, PLC

20090034567 - Method of manufacturing semiconductor laser, semiconductor laser, optical pickup, optical disk device, method of manufacturing semiconductor device, semiconductor device, and method of growing nitride type group iii-v compound semiconductor layer: A method of manufacturing a semiconductor laser having an end face window structure, by growing over a substrate a nitride type Group III-V compound semiconductor layer including an active layer including a nitride type Group III-V compound semiconductor containing at least In and Ga. The method includes the steps of... Agent: Sonnenschein Nath & Rosenthal LLP

20090034568 - Zinc oxide based compound semiconductor device: There is provided a zinc oxide based compound semiconductor device in which drive voltage is not raised, property of crystal is satisfactory and device characteristics is excellent, even when the semiconductor device is formed by forming a lamination portion having a hetero junction of the ZnO based compound semiconductor layers.... Agent: Rabin & Berdo, PC

20090034569 - Monolithic semiconductor laser: There is disclosed a monolithic semiconductor laser which is provided with an AlGaAs based semiconductor laser element (10a) and an InGaAlP based semiconductor laser element (10b) formed on a semiconductor substrate (1). The AlGaAs based semiconductor laser element (10a) is composed of an infrared light emitting layer forming portion (9a),... Agent: Rabin & Berdo, PC

20090034571 - Migration enhanced epitaxy fabrication of active regions having quantum wells: Semiconductor lasers, such as VCSELs having active regions with flattening layers associated with nitrogen-containing quantum wells are disclosed. MEE (Migration Enhanced Epitaxy) is used to form a flattening layer upon which a quantum well is formed and thereby enhance smoothness of quantum well interfaces and to achieve narrowing of the... Agent: Workman Nydegger 1000 Eagle Gate Tower

20090034570 - Quantum cascade laser structure: A quantum cascade laser structure in accordance with the invention comprises a number of cascades (100), each of which comprises a number of alternately arranged quantum wells (110a to 110j) and barrier layers (105 to 105j). The material of at least one quantum well (110a to 110j) as well as... Agent: Rothwell, Figg, Ernst & Manbeck, P.C.

20090034572 - Surface-emitting laser: Provided is a high-output surface-emitting laser capable of reducing effects on reflectance of an upper reflection mirror in a single transverse mode. The surface-emitting laser includes plural semiconductor layers, laminated on a substrate, which includes a lower semiconductor multilayer reflection mirror, an active layer, and an upper semiconductor multilayer reflection... Agent: Fitzpatrick Cella Harper & Scinto

20090034573 - Semiconductor laser device and fabrication method for the same: The semiconductor laser device includes a cavity structure having a first clad layer, an active layer and a second clad layer formed on a substrate. The second clad layer has a stripe portion extending between the front end face from which laser light is extracted and the rear end face... Agent: Mcdermott Will & Emery LLP

20090034574 - Slab laser with stand-off for ceramic spacers: An RF excited gas discharge laser is disclosed including a housing holding the lasing gas. An electrode assembly is mounted within the housing. The electrode assembly includes a pair of elongated planar electrodes mounted in face to face relationship with a narrow gap therebetween. A pair of planar dielectric plates... Agent: Stallman & Pollock LLP

20090034575 - Laser apparatuses with large-number multi-reflection pump systems: A large number of passes of pump light through an active mirror in a solid state disk laser is realized using a pair of coupled imaging systems, where the optical axes of imaging systems are not coincident. Two imaging systems are optically coupled, so that an image of the first... Agent: Townsend And Townsend And Crew, LLP

20090034576 - Linewidth-narrowed excimer laser cavity: A double-grating excimer laser cavity is disclosed which includes a first multilayer dielectric diffraction grating comprised of a dielectric stack having a plurality of continuous layers with alternating high and low refractive indices, and a nonmetallic diffraction grating disposed on the top layer of the plurality of layers. The nonmetallic... Agent: Rissman Jobse Hendricks & Oliverio, LLP

20090034578 - Laser irradiating method and device for the same: Because a focal distance of a condenser lens is changed due to a change in temperature, when irradiation of a laser beam is restarted after the irradiation has stopped, it takes a long time to restore a temperature of the cooled lens to a given temperature, and the operating efficiency... Agent: Wenderoth, Lind & Ponack, L.L.P.

20090034577 - Thermal distortion compensation for laser mirrors: A laser mirror assembly is disclosed with improved pointing stability. An elongated mirror includes a concave reflecting portion. A pair of elongated planar portions extend parallel to the concave reflecting portion on either side thereof. The planar portions are stepped down from the reflecting portion. The mirror is formed from... Agent: Stallman & Pollock LLP