Coherent light generators inventions 12/06

20060291509 - Apparatus for illuminating a surface: Apparatus for illuminating a surface, having at least one semiconductor laser bar with a plurality of emitters in the case of which the spacing of the individual emitters from one another is smaller than the extent of the emitters in the first direction (X), beam transforming means for transforming the... Agent: Hoffman, Wasson & Gitler, P.C.

20060291510 - Laser control circuit: An apparatus and method to safely control the power output of a laser source. A power monitor is optically coupled to monitor a power output of laser source generating an optical signal. The power monitor is coupled to generate power feedback data indicative of the power output. A processor is... Agent: Blakely Sokoloff Taylor & Zafman

20060291511 - Power control apparatus for a laser module and a method thereof: A power control apparatus for controlling the output power of a laser module and a method thereof are disclosed. The power control apparatus includes a feedback unit, a digital control unit, and a driving unit. The feedback unit detects the output power of the laser module and generates a corresponding... Agent: Rosenberg, Klein & Lee

20060291512 - Apparatus and method for driving laser diodes: Apparatus and method for driving laser diodes with electrical power in pulsed operation. Pulsed power, for example using pulse-width modulation, is applied through an inductor in one or more parallel regulator circuits having little or no output capacitance to provide a high-efficiency laser-diode-driver power supply. Some embodiments that use two... Agent: Lemaire Patent Law Firm, P.l.l.c.

20060291513 - Zoom optical system: At least one exemplary embodiment is directed to a zoom optical system which includes a plurality of optical groups with variable optical power arranged along an optical axis; and at least one optical group arranged along the optical axis, and where the system is zoomed by changing the power of... Agent: Canon U.s.a. Inc. Intellectual Property Division

20060291514 - Algainn-based lasers produced using etched facet technology: A process for fabricating lasers capable of emitting blue light wherein a GaN wafer is etched to form laser waveguides and mirrors using a temperature of over 500° C. and an ion beam in excess of 500 V in CAIBE.... Agent: Jones, Tullar & Cooper, P.C.

20060291515 - High power vertical external cavity surface emitting laser: An improved VECSEL device is provided in which the gain of each of the quantum well layers can be increased in a periodic gain structure. A vertical external cavity surface emitting laser (VECSEL) device comprising: a substrate; a bottom DBR mirror formed on the substrate; a multiple quantum well layer... Agent: Buchanan, Ingersoll & Rooney PC

20060291516 - Optical semiconductor device and optical module using thereof: The invention aims at realizing a 1300-nm-band direct modulation laser, having a single lateral mode, in which a chip light power of several milliwatts and a low current operation are simultaneously realized. Also, the invention aims at realizing a laser light source excellent in economy as well by realizing output... Agent: Antonelli, Terry, Stout & Kraus, LLP

20060291517 - High pulse repetition rate gas discharge laser: A pulsed gas discharge laser operating at an output laser pulse repetition rate of greater than 4 kHz and a method of operating same is disclosed which may comprise a high voltage electrode having a longitudinal extent; a main insulator electrically insulating the high voltage electrode from a grounded gas... Agent: William C. Cray Cymer, Inc.

20060291518 - Laser filament imager: An apparatus includes a gas chamber comprising a gas feed nozzle, an exhaust nozzle, and a window. The apparatus also includes a first partial reflector, in the gas chamber, sharing an optical path with the exhaust nozzle, and the window. Optionally, The apparatus includes a gas source communicating with the... Agent: Naval Research Laboratory Associate Counsel (patents)

20060291519 - Increasing the resistance of crystals to optical damage: The invention relates to a method for desensitizing a crystal exhibiting non-linear optical properties, in particular a lithium niobate or lithium tantalate crystal against damage of exposure to light action (optical damages). The similar type damages are caused by refraction index modifications induced by light. The dark conductivity of the... Agent: Kenyon & Kenyon LLP

20060291520 - Laser system with multiple wavelength diode pump head and associated method: A laser system comprises a reflective chamber capable of housing a laser medium and at least two laser diodes emitting light at different respective wavelengths into the reflective chamber. The wavelength of each respective laser diode may be selected to minimize fluctuations in absorption by the laser medium of light... Agent: Alston & Bird LLP

20060291521 - Self-similar laser oscillator: A laser producing high energy ultrashort laser pulses comprises a normal dispersion segment, a gain segment, an anomalous dispersion segment with negligible nonlinearity and an effective saturable absorber arranged to form a laser cavity. Each segment is optically interconnected so that a laser pulse will propagate self-similarly therein. (A pulse... Agent: Jones, Tullar & Cooper, P.C.

20060285560 - Semiconductor laser capable of coupling with single mode optical fiber at high coupling efficiency: A semiconductor laser includes a substrate made of InP, an active layer including a multiquantum well structure, which is formed in a width of 7 to 14 μm on the substrate, and an n-type cladding layer made of InGaAsP and a p-type cladding layer made of InP, which are formed... Agent: Frishauf, Holtz, Goodman & Chick, PC

20060285561 - Pulsed laser source with adjustable grating compressor: Various embodiments described herein relate to a laser source for producing a pulsed laser beam comprising a plurality of ultrashort optical pulses having a variable repetition rate. In one embodiment, the laser source comprises a fiber oscillator, which outputs optical pulses and a pulse stretcher disposed to receive the optical... Agent: Knobbe Martens Olson & Bear LLP

20060285562 - Semiconductor laser device: A first reflective surface is disposed on the optical axis of monitor light emitted from a semiconductor laser element, and a second reflective surface is disposed on an inner surface of a lid portion. The first reflective surface is so inclined that the monitor light traveling on the optical axis... Agent: Nixon & Vanderhye, PC

20060285563 - Optical apparatus: The present invention is an optical apparatus which enables highly accurate detection of the LD ambient temperature by means of a simple constitution. The apparatus of the present invention therefore comprises a laser diode for emitting output light; a photodiode disposed in proximity to the laser diode; a forward bias... Agent: Staas & Halsey LLP

20060285564 - Semiconductor laser driving circuit less susceptible to noise interference: A laser driving circuit configured to drive a semiconductor laser diode, which is less susceptible to noise interference and capable of achieving the control of laser light intensity with high accuracy. Respective circuit components in the laser driving circuit such as an amplifier circuit, a sample hold circuit, a voltage-to-current... Agent: Dickstein Shapiro LLP

20060285565 - Structure of laser and method of manufacturing the same: A structure of laser and manufacture methods thereof are disclosed. The method comprises the steps of: 1. coupling a plurality of photo diodes with first pins of a plurality of pin groups on a frame; 2. mounting a plurality of laser diodes on the photo diodes; 3. bonding the laser... Agent: Troxell Law Office PLLC

20060285566 - Surface-emitting laser diode with tunnel junction and fabrication method: A surface emitting semiconductor laser diode includes a semiconductor substrate, a first reflective film provided on the semiconductor substrate, a second reflective film provided above the first reflective film, an active region, a tunnel junction region, and a current funneling layer. The active region, the tunnel junction region, and the... Agent: Oliff & Berridge, PLC

20060285567 - Surface-emitting semiconductor laser array and optical transmission system using the same: A surface emitting semiconductor laser includes a substrate, at least one light-emitting element on the substrate, and at least one protection element on the substrate. The light-emitting element includes a first semiconductor layer of a first conduction type electrically connected to a first electrode, and a second semiconductor layer of... Agent: Oliff & Berridge, PLC

20060285568 - Vertical-cavity surface-emitting laser device array and method of manufacturing the same: A plurality of vertical-cavity surface-emitting laser devices each having a different lasing wavelength are arrayed by a simple structure and a manufacturing process without increasing device resistance. Each vertical-cavity surface-emitting laser device comprises a layered structure including an active layer and a current confinement layer. The area of current confinement... Agent: David R. Metzger Sonnenschein Nath & Rosenthal

20060285569 - Tracking system with excited state atomic line filter: A tracking system utilizing an excited state atomic line filter. The filter includes a metal vapor cell having an optical entrance port and an optical exit port and containing a metal vapor having a first excited energy state with a resonant frequency, and a second excited energy state. The cell... Agent: Trex Enterprises Corp.

20060285570 - Semiconductor laser device having an insulation region: A semiconductor laser device includes a substrate having a first surface and a second surface opposite to the first surface, an active region formed on the second surface of the substrate, a cladding layer formed on the active region, and an insulation region formed in the cladding layer to form... Agent: Birch Stewart Kolasch & Birch

20060285571 - Diode-pumped, solid-state laser with chip-shaped laser medium and heat sink: A chip-shaped laser medium (12) is side pumped to improve mode matching between the pumping energy (50) and lasing mode volume (36). The chip thickness (44) and laser medium doping level can be designed and controlled to ensure adequate pumping coupling efficiency. The chip shape can also be employed to... Agent: Stoel Rives LLP

20060280208 - Fiber laser: A diode laser pumped, power stabilized fiber laser comprising a doted fiber, a pumping light source, as well as entrance and exit side resonator units wherein the entrance resonator unit and/or the exit resonator unit have controllable distances (gaps) to the fiber end faces, which are up to 20 μm... Agent: Ohlandt, Greeley, Ruggiero & Perle, LLP

20060280209 - Beam combining methods and devices with high output intensity: Embodiments are directed to a beam combining apparatus including a light source having a first emitter with a first output wavelength and at least one second emitter having a second output wavelength. A beam conditioning section is configured to collimate the output of the emitters and provide diffractive optical feedback... Agent: Biotechnology Law Group C/o Portfolioip

20060280210 - Holographic memory reproduction apparatus, holographic recording and reproduction apparatus, holographic recording and reproducing method, and holographic recording medium: A holographic memory reproduction apparatus which makes a wavelength of a reproducing laser beam coincident with a wavelength of a laser beam used for holographic recording when information is reproduced from a holographic recording medium. In the holographic memory reproduction apparatus 10, a temperature adjustment device 26 is attached to... Agent: Oliff & Berridge, PLC

20060280211 - Laser driver analog loop control and method: Various systems and methods are provided for biasing a laser. In one example, a feedback circuit establishes a bias current in a laser. A stabilizing capacitor is coupled to the feedback circuit, the stabilizing capacitor slowing the response of the feedback circuit to a feedback input. A capacitor charging circuit... Agent: Thomas, Kayden, Horstemeyer & Risley

20060280212 - Laser level with selectable constant or pulsed beam output: A laser marking device including an oscillating mechanism that enables the laser beams emitted from the device to be emitted in either a constant state or in a pulsed state to enhance the visibility of the laser beam in various lighting conditions. The oscillating mechanism modulates the power supplied by... Agent: Andrew S. Mcconnell Boyle, Fredrickson, Newholm, Stein & Gratz, S.c.

20060280213 - Laser oscillator: Provided is a laser oscillator (2) including: a first electrode pair (7a); a second electrode pair (7b); a discharge power supply (4) that induces pulse discharge in the first and second electrode pairs (7a, 7b); and at least one of a discharge phase control unit (53) which extends control so... Agent: Drinker Biddle & Reath (dc)

20060280214 - Circuit arrangement: A circuit arrangement for generating light pulses includes an electro-optical converter; a switching element; and a charge store. The electro-optical converter is connected to the charge store via the switching element. The closing of the switching element triggers a discharging process in the charge store and, in the process, generates... Agent: Venable LLP

20060280215 - Ridge-waveguide semiconductor laser diode: A ridge-waveguide semiconductor laser diode with an improved current injection structure is provided. The ridge-waveguide semiconductor laser diode includes: a substrate; a lower multi-semiconductor layer formed on the substrate; an active layer formed on the lower multi-semiconductor layer; an upper multi-semiconductor layer having a ridge portion and formed on the... Agent: Buchanan, Ingersoll & Rooney PC

20060280216 - Semiconductor laser-based spectrometer: A semiconductor laser-based spectrometer according to the present invention includes a plurality of semiconductor lasers comprising a plurality of semiconductor gain medium compositions directly coupled to a large-core multi-mode fiber with no intervening optics. An output radiation from the multi-mode fiber is tunable by switching the drive current amongst the... Agent: Vijaysekhar Jayaraman Praevium Research, Inc.

20060280217 - Optical apparatus, comprising a brightness converter, for providing optical radiation: Apparatus for providing optical radiation (10), which apparatus comprises a pump source (1) for providing pump radiation (2), and a brightness converter (3), the apparatus being characterised in that the brightness converter (3) includes a substantially rigid region along at least a portion of its length.... Agent: John S Reid Reidlaw

20060280218 - Surface-emitting type semiconductor laser: A surface-emitting type semiconductor laser includes: an emission section including at least a lower mirror layer, an active layer and an upper mirror layer; a rectification section including at least a lower semiconductor layer and an upper semiconductor layer; a first conductive layer that electrically connects the upper mirror layer... Agent: Oliff & Berridge, PLC

20060280219 - Frequency stabilized vertical extended cavity surface emitting lasers: A vertical extended cavity surface emitting laser (VECSEL) includes intra-cavity frequency doubling. Conventional frequency control elements, such as etalons, are replaced with thin film interference filters or volume Bragg gratings.... Agent: Cooley Godward Kronish LLP

20060280220 - Optically-pumped vertical external cavity surface emitting laser: A vertical external cavity surface emitting laser (VECSEL) is provided in which a pump laser beam is incident on a laser chip at a right angle. In the surface emitting laser, a laser chip emits light at a first wavelength by optical pumping, an external mirror is spaced apart from... Agent: Buchanan, Ingersoll & Rooney PC

20060280221 - Monoblock laser with improved alignment features: A laser resonator has a support disposed on its axis, to support an adjustable element rotatable with respect to the axis. An HR mirror reflects light, which passes through gain element means and partially through an OC mirror to provide a laser output. The adjustable element is fixed in rotation... Agent: Westman Champlin & Kelly, P.A.

20060274793 - Control of output beam divergence in a semiconductor waveguide device: A semiconductor laser device incorporates a beam control layer (42, 41) for reducing far field and beam divergence. Within the beam control layer, a physical property of the semiconductor material varies as a function of depth through, the beam control layer, by provision of a first sub-layer (42) in which... Agent: Momkus Mccluskey Monroe Marsh & Spyratos, LLC

20060274794 - Problem diagnosis method and problem repair method for laser device: A problem diagnosis method and problem repair method for a laser device such as laser treatment devices used in the medical field and laser processing devices used in industrial fields, capable of detecting problems in laser devices early and reducing the time required for maintenance work on the laser devices... Agent: Pearne & Gordon LLP

20060274795 - Femtosecond laser device having output stabilizing mechanism: A femtosecond laser with stabilized output, and a method for stabilizing the output of a femtosecond laser. The femtosecond laser comprises a regenerative amplifier, a photodetector, a control portion and a variable attenuator, wherein the variable attenuator is provided so as to be capable of controlling an output beam of... Agent: Pearne & Gordon LLP

20060274796 - Real-time sensors for lasers: Methods of sensing lasers in real time for monitoring and control are disclosed. In one aspect, a method may include applying a perturbation current to a laser for a plurality of consecutive modulation cycles. Power of light emitted by the laser over the plurality of consecutive modulation cycles may be... Agent: Blakely Sokoloff Taylor & Zafman

20060274797 - Method for cooling semiconductor diodes and light emitting diodes: A relatively simple and inexpensive method to increase the operational lifetime of semiconductor laser diode elements and light emitting diodes (LEDs) is disclosed. The semiconductor laser diode element is placed in contact with a non-electrically conductive, chemically inert liquid. Preferably the liquid is a perfluorinated liquid. This results in a... Agent: Dickinson Wright PLLC

20060274798 - Electronic wavelength marker system and method: A system is provided for producing wavelength tunable laser light and a signal indicative of the wavelength of the produced laser light; a laser cavity includes an optical gain medium and a wavelength selective element disposed in a path of light emitted by the optical gain medium such that changing... Agent: Morrison & Foerster LLP

20060274799 - Vcsel semiconductor with esd and eos protection: A design device and method of manufacturing a vertical cavity surface emitting laser with a visual indicator for determining exposure to electrostatic discharge (ESD) or electrical overstress (EOS). Either an on-chip or off-chip fuse used in series or in parallel with the VCSEL that provides a visual indicator that the... Agent: Casey Toohey Emcore Corp.

20060274800 - Optical element and method for manufacturing the same: An optical element includes a columnar section having an upper surface from which light is emitted or upon which light is incident, and an electrode composed of a plurality of layers including at least a first conductive layer and a second conductive layer laminated above the first conductive layer and... Agent: Oliff & Berridge, PLC

20060274801 - Active region of a light emitting device optimized for increased modulation speed operation: In accordance with the invention, increased maximum modulation speeds and improved hole distribution are obtained for light emitting devices. Barrier layers of a quantum well structure for a light emitting device are formed with varying barrier energy heights. Quantum well layers of the quantum well structure are formed between the... Agent: Agilent Technologies Inc.

20060274802 - Semiconductor optical device and module using the same: A semiconductor laser device capable of providing high output power operation is provided which has a structure in which high output power and kink suppression can be simultaneously attained as well as these characteristics can be realized by a short chip length. In a waveguide structure of an MMI laser... Agent: Reed Smith LLP

20060274803 - Quantum well structure: A quantum well structure according to the invention includes a quantum well layer (107) arranged between two barrier layers (109, 112). It is distinguished in that at least one of the barrier layers (109) includes nanostructures (110) which compensate or modulate a lateral homogeneity of the barrier layer (109), that... Agent: Rothwell, Figg, Ernst & Manbeck, P.C.

20060274804 - Spatial filters: An etched-facet single lateral mode semiconductor photonic device is fabricated by depositing an anti reflective coating on the etched facet, and depositing a reflectivity modifying coating in a spatially controlled manner to modify the spatial performance of the emitted beam.... Agent: Jones, Tullar & Cooper, P.C.

20060274805 - High thermal conductivity vertical cavity surface emitting laser (vcsel): A light generating device such as a VCSEL includes a light generation layer, a top reflector, a bottom reflector, and a high thermal conductivity (HTC) layer between the light generation layer and the bottom reflector. The light generation layer is adapted to generate light having a first wavelength. Heat produced... Agent: Avago Technologies, Ltd. C/o Klaas, Law, O'meara & Malkin, P.C.

20060274806 - Gas laser apparatus: A gas laser apparatus including a laser oscillating section including a medium circuit allowing a medium gas to flow therethrough under pressure, and a gas-composition adjusting section for adjusting the composition of the medium gas flowing through the medium circuit of the laser oscillating section. The gas-composition adjusting section comprising... Agent: Drinker Biddle & Reath (dc)

20060274807 - Surface emitting laser aligned with pump laser on single heat sink: A vertical external cavity surface emitting laser is provided that is integrally mounted on a single heat sink together with a pump laser. In the surface emitting laser, a laser chip has a gain structure to emit light at a predetermined wavelength and it is disposed on a center portion... Agent: Buchanan, Ingersoll & Rooney PC

20060274808 - Method, apparatus and module using single laser diode for simultaneous pump of two gain media characteristic of polarization dependent absorption: A method, an apparatus, and a module for producing dual beam from a single laser diode provide for means of simultaneously pumping two individual gain media with orthogonal polarizations. A beam splitter splits the emissive laser beam into two portions based on the polarization. A polarization control element or mechanism... Agent: Sheng-bai Zhu

20060274809 - Cathodes for fluorine gas discharge lasers: A fluorine gas discharge laser electrode for a gas discharge laser having a laser gas containing fluorine is disclosed which may comprise a copper and copper alloy cathode body having an upper curved region containing the discharge footprint for the cathode comprising copper and a lower portion comprising a copper... Agent: William Cray C/o Cymer, Inc.

20060274810 - Wavelength tunable cavity with rotational movement: A wavelength tunable cavity includes a first reflecting unit adapted to at least partially reflect a beam of electromagnetic radiation towards a second reflecting unit, adapted to at least partially reflect a beam of electromagnetic radiation back towards said first reflecting unit, both reflecting units providing resonance modes of said... Agent: Agilent Technologies Inc.

20060274811 - Laser apparatus and method of driving diffraction grating: A laser apparatus is disclosed. The laser apparatus has a diffraction grating that receives laser light from a semiconductor laser, emits first order diffracted light having a predetermined wavelength to the semiconductor laser, and reflects zero-th order light, a reflection section that reflects the zero-th order light reflected by the... Agent: Sonnenschein Nath & Rosenthal LLP