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Coherent light generators February patent applications/inventions, industry category 02/12

20120044959 - Terahertz source: An optical system includes a first gain medium configured to be excited by an energy source and in response generate a first optical signal having first and second wavelengths. A Q-switch is disposed adjacent to the first gain medium for generating a pulsed optical signal in response to receiving the... Agent: Lehigh University

20120044960 - Uv illumination for mitigation of cold temperature pyroelectric effects in lithium niobate: An actively Q-switched laser based on UV illumination mitigates pyroelectric effects in lithium niobate. An exemplary embodiment comprises a pump source; a dichroic mirror having one end optically facing said pump source; a gain medium optically facing another end of said dichroic mirror; a polarizer having one end optically facing... Agent: United States Of America, As Represented By The Secretary Of The Army

20120044961 - Method of and photonic device for eliminating or substantially reducing sensitivity to polarization of an injected optical signal and method of manufacturing such photonic device: An photonic device, comprising one section of a material which is different from the material of another section such that the two sections present different optical birefringent index values. This causes a first set of polarization modes to move in a spectral space with a different velocity than a second... Agent:

20120044962 - Laser oscillator control device: A laser oscillator control device includes a controller having a transmitter section and a receiver section; a laser oscillator having a transmitter section and a receiver section and communicating with the controller via a communication line; wherein the laser oscillator control device outputs a control signal from the controller to... Agent: Fanuc Corporation

20120044963 - Apparatus for stabilizing second harmonic pulse output in a laser system operating by pulses: The present invention relates to an apparatus for stabilizing second harmonic wave pulse output in a laser system operating by pulses. The apparatus of the present invention comprises: a pulse laser oscillating unit (110) which outputs a laser pulse; a nonlinear crystal (120) which converts the laser pulse of a... Agent: Lutronic Corporation

20120044964 - Semiconductor interband lasers and method of forming: A semiconductor interband laser that includes a first cladding layer formed using a first high-doped semiconductor material having a first refractive index/permittivity and a second cladding layer formed using a second high-doped semiconductor material having a second refractive index/permittivity. The laser also includes a waveguide core having a waveguide core... Agent:

20120044965 - Semiconductor laser apparatus and optical apparatus: This semiconductor laser apparatus includes a base having a step portion, a first upper surface on a lower side of the step portion and a second upper surface on an upper side of the step portion, a first semiconductor laser device bonded onto the first upper surface, having a first... Agent: Sanyo Electric Co., Ltd.

20120044966 - Light source with a diode laser and a large number of optical fibers: A light source, e.g., for optical excitation of a laser device, includes a diode laser having a large number of emitters and a light-guiding device, the light-guiding device including a large number of optical fibers. Each fiber has a first end and a lateral surface, the first ends being arranged... Agent: Robert Bosch Gmbh

20120044967 - Capping method for laser diode protection: A method includes: positioning a laser in the cavity in an end of a slider, wherein the laser has an output facet positioned adjacent to a first wall of the cavity to define a first gap between the output facet and the first wall of the cavity, and filling at... Agent: Seagate Technology LLC

20120039344 - Graphene-based saturable absorber devices and methods: A graphene-based saturable absorber device suitable for use in a ring-cavity fiber laser or a linear-cavity fiber laser is disclosed. The saturable absorber device includes an optical element and a graphene-based saturable absorber material supported by the optical element and comprising at least one of graphene, a graphene derivative and... Agent:

20120039345 - Passively mode-locked picosecond laser device: A passively mode-locked picosecond laser device comprising a pump source, a laser crystal, a laser cavity, a mode-locked output structure is provided. In the device, the pump source is placed at the side of the incident end surface of the laser crystal; the laser cavity includes a plane reflective mirror... Agent: Beijing Gk Laser Technology Co., Ltd.

20120039346 - Feedback-enhanced self-injection locking of lasers to optical resonators: Techniques and devices that lock and stabilize a laser to an optical resonator via self-injection locking based on a reflection feedback. A whispering gallery mode optical resonator can be implemented to provide both the optical filtering and injection feedback based on the reflection feedback from feedback optics outside the optical... Agent: Oewaves, Inc.

20120039347 - Image display apparatus: An image display apparatus that displays an image by scanning of coherent light includes: a light source portion that emits the coherent light; a scanning portion that scans the coherent light; a concave reflection portion having a concave surface from which the coherent light is reflected; and an incident position... Agent: Seiko Epson Corporation

20120039348 - Systems and methods for stabilizing laser frequency based on an isoclinic point in the absorption spectrum of a gas: Systems and methods for stabilizing laser frequency based on an isoclinic point of an atomic or molecular medium are provided herein. A system may include: a transmission cell containing a gas and configured to transmit light from the laser, the gas having an absorption spectrum with an isoclinic point; a... Agent:

20120039349 - Circuit for controlling a gain medium: An assembly (10) that generates a laser beam (12) includes a voltage source (14), a gain medium (24A), a closed loop current regulator (22), and a controller (18). The gain medium (24A) generates the laser beam (12) when medium current flows through the gain medium (24A). The current regulator (22)... Agent:

20120039350 - High power, high efficiency quantum cascade lasers with reduced electron leakage: Semiconductor structures and laser devices including the semiconductor structures are provided. The semiconductor structures have a quantum cascade laser (QCL) structure including an electron injector, an active region, and an electron extractor. The active region of the semiconductor structures includes a configuration of quantum wells and barriers that virtually suppresses... Agent: Wisconsin Alumni Research Foundation

20120039351 - Resonator with intracavity transformation of a gaussian into a top-hat beam: The invention relates to an optical resonator, laser apparatus and a method of generating a laser beam inside an optical resonator. The optical resonator (10) includes an optical cavity (12) and an optical element (104.1, 104.2) at either end there-of, operable to sustain a light beam (108) therein, characterised in... Agent: Csir

20120033686 - All-gain guiding yb-dobed femtosecond fiber laser: A mode-locked fiber laser system is presented with an improved optical cavity structure having a lower doped and longer gain medium. The laser system comprises: a laser source operable to produce a light beam; an optical cavity structure operable to amplify a light beam propagating therethrough; and a beam splitter... Agent: The University Of Ottawa

20120033687 - Laser device: Disclosed is a laser device. The laser device includes a pulse generator which irradiates a laser beam between a high reflector mirror and an output coupler mirror to amplify and resonate the laser beam, a pulse output section which receives a laser beam pulse amplified and resonated through the output... Agent: Jawon Medical Co., Ltd.

20120033688 - Single longitudinal mode fiber laser apparatus: The present invention provides a single frequency fiber laser apparatus. The fiber laser apparatus includes a Faraday rotator mirror. A piece of erbium doped fiber is inside the laser cavity. A wavelength selective coupler is connected to the erbium doped fiber. A pump source is coupled via the wavelength selective... Agent: National Taiwan University Of Science And Technology

20120033690 - Giant-chirp oscillator for use in fiber pulse amplification system: A normal-dispersion fiber laser is operated using parameters in which dissipative solitons exist with remarkably large pulse duration and chirp, along with large pulse energy. A low-repetition-rate oscillator that generates pulses with large and linear chirp can thus replace the standard oscillator, stretcher, pulse-picker and preamplifier in a chirped-pulse fiber... Agent: Cornell University

20120033689 - High-precision synchronization of pulsed gas-discharge lasers: Two excimer lasers have individual pulsing circuits each including a storage capacitor which is charged and then discharged through a pulse transformer to generate an electrical pulse, which is delivered to the laser to generate a light pulse. The time between generation of the electrical pulse and creation of the... Agent: Coherent Gmbh

20120033691 - Device for determining the position of at least one structure on an object, use of an illumination apparatus with the device and use of protective gas with the device: A device for determining the position of a structure (3) on an object (2) in relation to a coordinate system is disclosed. The object (2) is placed on a measuring table (20) which is movable in one plane (25a), wherein a block (25) defines the plane (25a). At least one... Agent: Vistec Semiconductor Systems Gmbh

20120033692 - Optical pumping of a solid-state gain-medium using a diode-laser bar stack with individually addressable bars: A diode-laser bar stack includes a plurality of diode-laser bars having different temperature dependent peak-emission wavelengths. The stack is arranged such that the bars can be separately powered. This allows one or more of the bars to be “on” while others are “off”. A switching arrangement is described for selectively... Agent: Coherent, Inc.

20120033694 - Broadening of rare earth ion emission bandwidth in phosphate based laser glasses: Disclosed are the use of phosphate-based glasses as a solid state laser gain medium, in particular, the invention relates to broadening the emission bandwidth of rare earth ions used as lasing ions in a phosphate-based glass composition, where the broadening of the emission bandwidth is believed to be achieved by... Agent: Schott Ag

20120033693 - Rear earth aluminoborosilicate glass composition: The invention relates to aluminoborosilicate-based glasses suitable for use as a solid laser medium. In particular, these aluminoborosilicate-based laser glasses exhibit broad emission bandwidths of rare earth lasing ions. Although not entirely understood, the broadening of the emission bandwidth is believed to be achieved by the presence of significant amounts... Agent: Schott North America

20120033695 - Semiconductor laser apparatus and optical apparatus: This semiconductor laser apparatus includes a package constituted by a plurality of members, having sealed space inside and a semiconductor laser chip arranged in the sealed space, while surfaces of the members located in the sealed space are covered with a covering agent made of an ethylene-polyvinyl alcohol copolymer.... Agent: Sanyo Electric Co., Ltd.

20120033696 - Semiconductor laser apparatus and optical apparatus: This semiconductor laser apparatus includes a package having sealed space inside and a semiconductor laser chip arranged in the sealed space. The package has a first member and a second member bonded to each other with an adhesive, a covering agent made of an ethylene-vinyl alcohol copolymer is formed on... Agent: Sanyo Electric Co., Ltd.

20120033697 - Wavelength beam combining of quantum cascade laser arrays: A laser source based on a quantum cascade laser array (QCL), wherein the outputs of at least two elements in the array are collimated and overlapped in the far field using an external diffraction grating and a transform lens.... Agent: Massachusetts Institute Of Technology

20120033698 - Nitride semiconductor laser element and method for manufacturing same: A nitride semiconductor laser element has: a nitride semiconductor layer having cavity planes at the ends of a waveguide region, an insulating film formed on an upper face of the nitride semiconductor layer so that the ends on the cavity plane side are isolated from cavity planes, and a first... Agent: Nichia Corporation

20120033699 - Surface-emitting laser, surface-emitting laser array, display apparatus including the surface-emitting laser array as a light source, printer head, and printer: Provided is a surface-emitting laser including a periodic gain structure, which is capable of improving uniformity of carrier injection into multiple active regions and carrier confinement, to thereby improve laser characteristics. The surface-emitting laser includes: a first DBR layer; a first cladding layer; multiple active regions each including a multiple... Agent: Canon Kabushiki Kaisha

20120033701 - Method of manufacturing semiconductor laser device, semiconductor laser device and light apparatus: A method of manufacturing a semiconductor laser device comprises steps of forming a first semiconductor laser device substrate having first grooves for cleavage on a surface thereof, bonding a second semiconductor laser device substrate onto the surface side having the first grooves and thereafter cleaving the first and second semiconductor... Agent: Sanyo Electric Co., Ltd.

20120033702 - Semiconductor laser apparatus: A p-type pad electrode in a red semiconductor laser device and a first terminal are connected through a wire. A p-type pad electrode in an infrared semiconductor laser device and a second terminal are connected through a wire. A p-electrode in a blue-violet semiconductor laser device and a third terminal... Agent: Sanyo Electric Co., Ltd.

20120033700 - Semiconductor laser device: A semiconductor laser device includes a semiconductor laser element configured to emit a fundamental wave; a transducer configured to receive the fundamental wave incident thereon and convert a wavelength of the fundamental wave to emit wavelength converted light; a filter configured to selectively transmit wavelength range light having a desired... Agent:

20120033703 - Hermetically-sealed rf feed-through with integrated capacitor: A carbon-dioxide (CO2) gas-discharge slab laser includes elongated discharge-electrodes in a sealed enclosure. Radio Frequency (RF) power is supplied to the electrodes via an impedance matching network and a co-axial electrical low inductance transmission line feed-through sealed to the enclosure. The feed-trough includes two spring contacts which are configured to... Agent: Coherent, Inc.

20120033704 - Laser pump arrangement and laser pump method with beam homogenization: In a laser pump arrangement for a laser medium that amplifies a laser beam, comprising at least one laser pump source (1″) with a plurality of emitters for generating partial pumping streams (TPS1″, TPS2″), the partial pumping streams (TPS1″, TPS2″) are led through a coupling optic to a homogenizer (3″)... Agent: High Q Technologies Gmbh

20120027031 - Amplified broadband fiber laser source: Methods and systems for generating a supercontinuum light source, including generating electromagnetic radiation from a seed laser; coupling the seed laser electromagnetic radiation to a fiber amplifier comprising: a pump laser, a fiber coupler comprising an input and an output, and a nonlinear gain fiber comprising an input and an... Agent:

20120027032 - Decohered laser light production system: A decohered laser light production system is provided. The decohered laser light system comprises a laser source. The system further comprises a multi-mode fiber having an input face, an output face and a body for propagating light from the input face to the output face, the input face arranged to... Agent: Christie Digital Systems Usa, Inc.

20120027033 - Multi-segment all-fiber laser: A multi-segment all-fiber laser is provided. The device includes a first active fiber laser segment, a first grating, a second grating, and a gain-phase coupling fiber segment arranged between the first and second gratings, said gain-phase coupling segment providing coupling of gain and phase between said first and second gratings.... Agent: Humboldt-universitat Zu Berlin

20120027034 - Beam quality of the monoblock laser through use of a 1.5 micron external cavity partial reflector: A monoblock laser cavity incorporates optical components for a short-pulse laser. These optical components are ‘locked’ into alignment forming an optical laser cavity for flash lamp or diode laser pumping. The optical laser cavity does not need optical alignment after it is fabricated, increasing the brightness of the monoblock laser.... Agent: United States Of America, As Represented By The Secretary Of The Army

20120027035 - High-power, phase-locked, laser arrays: High-power, phased-locked, laser arrays as disclosed herein utilize a system of optical elements that may be external to the laser oscillator array. Such an external optical system may achieve mutually coherent operation of all the emitters in a laser array, and coherent combination of the output of all the lasers... Agent: Pd-ld, Inc.

20120027036 - Optical device and method for fabricating optical device: An optical device including: a carrier having a first area and a second area, both edges of the second area having a wall of a step, one edge of the second area being adjacent to the first area, the first area having a first thickness, the second area having a... Agent: Sumitomo Electric Device Innovations, Inc.

20120027037 - Semiconductor laser drive device and image forming apparatus incorporating same: A semiconductor laser drive device includes a semiconductor-laser drive element to generate a drive current according to an input control signal to supply the drive current to a semiconductor laser, a control circuit to control the drive current by controlling the semiconductor-laser drive element, and a drive current detection circuit... Agent: Ricoh Company, Ltd.

20120027039 - Group-iii nitride semiconductor laser device, and method for fabricating group-iii nitride semiconductor laser device: Provided is a group-III nitride semiconductor laser device with a laser cavity enabling a low threshold current, on a semipolar surface of a support base the c-axis of a hexagonal group-III nitride of which tilts toward the m-axis. In a laser structure 13, a first surface 13a is a surface... Agent: Sumitomo Electric Industries, Ltd.

20120027038 - Two-dimensional photonic crystal laser: A two-dimensional photonic crystal laser according to the present invention includes a two-dimensional photonic crystal layer 15 having a base body made of AlαGa1-αAs (0<α<1) or (AlβGa1-β)γIn1-γP (0<=β<1, 0<γ<1) with modified refractive index areas (air holes) 151 periodically arranged therein and an epitaxial growth layer 16 created on the two-dimensional... Agent: Kyoto University

20120027040 - Semiconductor laser apparatus and optical apparatus: In this semiconductor laser apparatus, a first wire-bonding portion is arranged at a position in a fourth direction from a first semiconductor laser device and in a first direction from a photodetector, and a second wire-bonding portion is arranged at a position in the fourth direction from the first semiconductor... Agent: Sanyo Electric Co., Ltd.

20120027041 - Wavelength variable laser and a manufacturing method thereof: A wavelength variable laser includes: a substrate on which an optical coupler is formed as a planar optical waveguide; a DFB array part arranged on the substrate and having DFB laser elements respectively supply optical signals to the optical coupler; and an SOA part arranged on the substrate and having... Agent:

20120027042 - Multiple discharge co2 laser with improved repetition rate: A CO2 gas flow laser with multiple discharge modules places acoustic baffles between the discharge modules to suppress shock waves and ions passing between the discharge modules such as may disrupt the optical path of the laser. A catalyst may be placed in a center of a toroidal recirculation chamber... Agent:

20120027043 - High power multi-chip pump modules with protection filter for 1060nm, and pump modules including the same: A multi-chip pump unit comprising a light source and a filter for directing light from the light source towards an optical fiber, wherein the filter exhibits one of either (i) relatively low transmissivity and high reflectivity at a wavelength of the light source, and relatively high transmissivity and low reflectivity... Agent: