Miscellaneous Patents (Class 372/109)
  • Patent number: 10959699
    Abstract: Embodiments of the present invention include a laser catheter that includes a catheter body, a light guide, and a distal tip that extends beyond the exit aperture of the light guide. In some embodiments, an imaging device is disposed on the distal tip such that the imaging device is distal relative to the exit aperture of the light guide. In some embodiments, the imaging device can be gated to record images during and or slightly beyond periods when the laser catheter is not activated.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: March 30, 2021
    Assignee: THE SPECTRANETICS CORPORATION
    Inventors: Kevin D. Taylor, Ken Harlan, James Nye, Robert Splinter, Jacob Keeler, Chris Hebert, Wade Bowe
  • Patent number: 10886693
    Abstract: An optical module includes a housing and an optical element that is disposed in the housing and emits light in the housing, in which a partial area of a surface inside the housing serves as a reduced optical reflection area processed so as to absorb the light and have a rough surface.
    Type: Grant
    Filed: August 12, 2019
    Date of Patent: January 5, 2021
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Maiko Ariga, Yuta Ishige, Masaki Iwama
  • Patent number: 10582603
    Abstract: Laser amplification utilizing plasma confinement of a gas laser gain media is described. The gas laser gain media is compressed into plasma utilizing a self-reinforcing magnetic field referred to a plasma pinch (e.g., a flow stabilized z-pinch). In the plasma pinch, the gas laser gain media is compressed to a high density, which improves the gain of the media. An optical resonator partially surrounds the plasma pinch and utilizes the laser gain media compressed within the plasma pinch to generate an output of coherent light.
    Type: Grant
    Filed: May 22, 2018
    Date of Patent: March 3, 2020
    Assignee: The Boeing Company
    Inventors: James A. Grossnickle, Dejan Nikic
  • Patent number: 10333277
    Abstract: A structure light module comprises: a VCSEL substrate comprising a VCSEL array comprising a plurality of individual VCSELs; a first spacer disposed on the VCSEL substrate; a wafer level lens comprising a glass substrate and at least a replicated lens on a first surface of the glass substrate disposed on the first spacer; a second spacer disposes on the wafer level lens; a DOE disposed on the second spacer, where a structure light is projected from the DOE on a target surface for 3D imaging.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: June 25, 2019
    Assignee: OmniVision Technologies, Inc.
    Inventors: Tsung-Wei Wan, Wei-Ping Chen
  • Patent number: 10333275
    Abstract: A packaging assembly for a high-speed vertical-cavity surface-emitting laser (VCSEL) mainly applies a lens assembly consisted of several prisms to split a laser beam emitted by a VCSEL element so as to guide a small portion of the laser beam back to a monitor photodiode (MPD) and the rest of the laser beam to travel away along an optical axis. Such a spectacular design of the lens assembly can not only relieve the VCSEL element from a position right under the optical axis, but can also reduce signal loss by shorting a length of a bonding wire for a corresponding pin through disposing the VCSEL element further close to the corresponding pin. Thereupon, a defect of lights reflected from a lens or a translucent plate on a cap can be substantially improved.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: June 25, 2019
    Assignee: True Light Corporation
    Inventors: Tzu-Ching Yeh, Yu-Fu Wu, Cheng-Ta Chen
  • Patent number: 10186834
    Abstract: To provide a laser oscillator allowing the use of a plastic lens in a semiconductor laser module for a high-output laser oscillator while being unlikely to reduce the efficiency of coupling to an optical fiber even if a laser output changes. A laser oscillator comprises a semiconductor laser module with multiple semiconductor laser elements. The laser oscillator comprises: multiple lenses in a first group provided in the semiconductor laser module for causing laser beams from the semiconductor laser elements to pass through; and a lens in a second group provided in the semiconductor laser module for causing all beams having passed through the multiple lenses in the first group to pass through. The lenses in the first group are plastic lenses. The lens in the second group is a glass lens.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: January 22, 2019
    Assignee: FANUC CORPORATION
    Inventor: Tetsuhisa Takazane
  • Patent number: 9859681
    Abstract: An optical device includes a semiconductor element configured to emit emission light or to receive incident light, including a first fitting part including a portion having a convex shape in a first region; an optical member arranged on an optical path of the emission light emitted from the semiconductor element or the incident light entering the semiconductor element, including a second fitting part fitted to at least a part of the portion having the convex shape, the first region being opposed to the optical member; and a joint part that joins the semiconductor element and the optical member, arranged between the first fitting part and the second fitting part.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: January 2, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kazuhiko Adachi, Naoto Jikutani
  • Patent number: 9739958
    Abstract: An optical subassembly includes: a TSV submount layer carrying an active optical component and a sandwich cap bonded to the TSV submount layer. The sandwich cap includes a bottom spacer layer disposed above the TSV submount layer, a glass layer above the bottom spacer layer, and an upper spacer layer above the glass layer. A cavity is defined in the bottom spacer layer and configured for accommodating the active optical component. At least one first lens is formed on the glass layer and is opposite to the active optical component. An alignment feature is formed in the upper spacer layer.
    Type: Grant
    Filed: July 4, 2016
    Date of Patent: August 22, 2017
    Assignee: SAE Magnetics (H.K.) Ltd.
    Inventors: Wei Ma, Wai Hung, Francis Guillen Gamboa, Xiaoming Yu, Dennis Tak Kit Tong
  • Patent number: 9716369
    Abstract: Method and devices for emitting electromagnetic radiation at high power using nonpolar or semipolar gallium containing substrates such as GaN, AlN, InN, InGaN, AlGaN, and AlInGaN, are provided. The laser devices include multiple laser emitters integrated onto a substrate (in a module), which emit green or blue laser radiation.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: July 25, 2017
    Assignee: Soraa Laser Diode, Inc.
    Inventors: James W. Raring, Paul Rudy, Chendong Bai
  • Patent number: 9601904
    Abstract: A high-power laser system includes a plurality of cascaded diode drivers, a pump source, and a laser element. The diode drivers are configured to generate a continuous driver signal. The pump source is configured to generate radiated energy in response to the continuous driver signal. The laser element is disposed downstream from the pump source and is configured to generate a laser beam in response to stimulation via the radiated energy. The high-power laser system further includes an electronic controller configured to output at least one driver signal that operates the plurality of diode drivers at a fixed frequency. The at least one driver signal operates a first cascade diode driver among the plurality of diode drivers 90 degrees out of phase with respect to a second cascade diode driver among the plurality of diode drivers.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: March 21, 2017
    Assignee: RAYTHEON COMPANY
    Inventors: Robert F. Stiffler, Joe A. Ortiz, Philip C. Todd, James Lazar
  • Patent number: 9502862
    Abstract: A light emitting elements drive control device includes: a detection unit that detects drive voltages and drive currents of a plurality of respective semiconductor light emitting elements arranged in a width direction of a recording medium; a calculation unit that calculates generated heat amounts of the respective semiconductor light emitting elements from heating-raised temperatures of the respective semiconductor light emitting elements determined based on the drive voltages and the drive currents detected by the detection unit, and calculates actual emission light quantities of the semiconductor light emitting elements from differences between the generated heat amounts of the semiconductor light emitting elements and input heat amounts corresponding to powers supplied to the semiconductor light emitting elements, respectively; and a correction unit that corrects differences between the actual emission light quantities of the semiconductor light emitting elements calculated by the calculation unit and req
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: November 22, 2016
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takashi Fujimoto, Chikaho Ikeda, Jun Isozaki, Akira Sakamoto
  • Patent number: 9429727
    Abstract: An optical subassembly includes: a TSV submount layer carrying an active optical component and a sandwich cap bonded to the TSV submount layer. The sandwich cap includes a bottom spacer layer disposed above the TSV submount layer, a glass layer above the bottom spacer layer, and an upper spacer layer above the glass layer. A cavity is defined in the bottom spacer layer and configured for accommodating the active optical component. At least one first lens is formed on the glass layer and is opposite to the active optical component. An alignment feature is formed in the upper spacer layer.
    Type: Grant
    Filed: November 6, 2014
    Date of Patent: August 30, 2016
    Assignee: SAE MAGNETICS (H.K.) LTD.
    Inventors: Wei Ma, Wai Hung, Francis Guillen Gamboa, Xiaoming Yu, Dennis Tak Kit Tong
  • Patent number: 9407838
    Abstract: The invention provides systems and methods for imaging a sample. In various embodiments, the invention provides a system comprising an image sensor, a laser for emitting excitation light for an infrared or near-infrared fluorophore, a visible light source, a notch beam splitter, a notch filter, a synchronization module, an image processing unit, an image displaying unit, and light-conducting channels. In various embodiments, the present invention provides a system comprising an image sensor, a laser for emitting excitation light for an infrared or near-infrared fluorophore, a laser clean-up filter, a notch filter, a white light source, an image processing unit, an image displaying unit, and light-conducting channels. In accordance with the present invention, the image sensor can detect both visible light and infrared light.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: August 2, 2016
    Assignee: Cedars-Sinai Medical Center
    Inventors: Pramod Butte, Adam Mamelak
  • Patent number: 8891581
    Abstract: A multi-wavelength semiconductor laser device includes a block having a V-shaped groove with two side faces extending in a predetermined direction; and laser diodes with different light emission wavelengths mounted on the side faces of the groove in the block so that their laser beams are emitted in the predetermined direction.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: November 18, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventor: Yuji Okura
  • Patent number: 8803027
    Abstract: 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 first axis and spatially expanding the beam in a second axis to produce a line beam for interaction with the film.
    Type: Grant
    Filed: May 23, 2007
    Date of Patent: August 12, 2014
    Assignee: Cymer, LLC
    Inventor: Thomas Hofmann
  • Patent number: 8752283
    Abstract: A method for operating an assembly tool includes deposing a first component on an assembly surface with a first tool tip of a manipulator having a range of motion defined by a plane and an axis that is substantially normal to the plane, deposing a second component on the assembly surface, changing an orientation of the assembly surface relative to the axis from a first orientation to a second orientation, lifting the first component from the assembly surface with a second tool tip of the manipulator, and deposing the first component on the second component.
    Type: Grant
    Filed: June 1, 2012
    Date of Patent: June 17, 2014
    Assignee: International Business Machines Corporation
    Inventors: Tymon Barwicz, Bing Dang
  • Patent number: 8711897
    Abstract: A split ring-resonator includes a substrate, an inner-trench or cavity formed into the substrate, the inner trench or cavity including a split, and an outer trench or cavity formed into the substrate around the inner trench or cavity, the outer trench or cavity including another split disposed at an opposite end of the split in the inner trench or cavity, wherein the inner trench or cavity and the outer trench or cavity are configured to receive an electrically conductive gas and/or plasma to form a split-ring resonator.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: April 29, 2014
    Assignee: Miles Technologies, LLC
    Inventor: Patrick Allen Miles
  • Patent number: 8687668
    Abstract: A multi-wavelength semiconductor laser device includes a block having a rectangular groove with a bottom face and two side faces extending in a predetermined direction; and laser diodes with different light emission wavelengths mounted on the bottom face and the side faces of the groove in the block so that their laser beams are emitted in the predetermined direction.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: April 1, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventor: Yuji Okura
  • Patent number: 8581771
    Abstract: A system is disclosed to identify authorized EO devices and unauthorized EO devices within a scene. The system hampers the operation of the unauthorized EO devices detected within the scene.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: November 12, 2013
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Timothy Bradley
  • Patent number: 8519299
    Abstract: A laser processing machine for processing workpieces, in particular metal sheets, includes a workpiece support and a beam receiver for the laser beam used as a processing tool. The distance between a workpiece lying on the workpiece support and the beam receiver is variable, owing to the fact that the workpiece support and the beam receiver are positionable relative to one another along the beam axis of the laser beam by means of an adjusting drive of an adjusting device with a positioning movement of a variably definable magnitude. A method for processing workpieces, in particular metal sheets, is also provided.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: August 27, 2013
    Assignee: TRUMPF Werkzeugmaschinen GmbH+Co. KG
    Inventors: Frank Schmauder, Andreas Bunz
  • Patent number: 8493261
    Abstract: A countermeasure device for directing a mobile tracking device away from an asset is provided. The countermeasure device includes a continuous wave laser source whose output is directed at a seeker head of the mobile tracking device. The countermeasure device causes the generation of localized sources within the mobile tracking device and confuses the mobile tracking device as to the true location of the asset.
    Type: Grant
    Filed: September 17, 2012
    Date of Patent: July 23, 2013
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Timothy Bradley
  • Patent number: 8376586
    Abstract: A light pointer apparatus and method of use comprising: a substantially flat bottom surface comprising a sufficiently large surface area such that when said substantially flat bottom surface is rested upon a substantially flat horizontal surface, said apparatus remains substantially immobile and stable relative to the substantially flat horizontal surface solely by virtue of the plane of contact formed between said substantially flat bottom surface and the substantially flat horizontal surface; a light source for emitting a low-divergence light beam comprising wavelengths in the visible light spectrum with a beam divergence of at most three degrees, fixed in orientation relative to said substantially flat bottom surface so as to emit said low-divergence light beam at a predetermined emission angle of at least 45 degrees relative to said substantially flat bottom surface; and surfaces other than said substantially flat bottom surface capable of being held and moved by a human hand.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: February 19, 2013
    Inventor: Robert J. Abbatiello
  • Patent number: 8305252
    Abstract: A countermeasure device for directing a mobile tracking device away from an asset is provided. The countermeasure device includes a continuous wave laser source whose output is directed at a seeker head of the mobile tracking device. The countermeasure device causes the generation of localized sources within the mobile tracking device and confuses the mobile tracking device as to the true location of the asset.
    Type: Grant
    Filed: August 14, 2009
    Date of Patent: November 6, 2012
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Timothy Bradley
  • Patent number: 7970033
    Abstract: A semiconductor device includes: a first lead having an element mounting portion; a second lead located in a same plane as the first lead, with a predetermined space left between the first lead and the second lead; a molding encapsulant made of a resin for fixing the leads; and a semiconductor element affixed to a top surface of the element mounting portion of the first lead. The molding encapsulant covers at least part of each of upper and lower surfaces of the leads. A resin injection hole mark, which is a mark of a hole through which the encapsulant has been injected, is left on the encapsulant, and part of the resin injection hole mark is located above the first lead or the second lead, and the remaining part of the resin injection hole mark is located above a space between the first lead and the second lead.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: June 28, 2011
    Assignee: Panasonic Corporation
    Inventors: Masanori Minamio, Noriyuki Yoshikawa, Shinichi Ijima
  • Patent number: 7933004
    Abstract: A method for acquiring information includes the steps of preparing a laser having a micro-cavity, and detecting a light emitted from the laser. An oscillation state of the laser is changed according to a change of an environmental condition around the micro-cavity, and the light emitted from the laser is changed.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: April 26, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Mitsuro Sugita
  • Patent number: 7929580
    Abstract: Pulses of signals in the terahertz region are generated using an apparatus made up of a mode-locked semiconductor laser diode with a short duty cycle that is optically coupled to a biased Auston switch. The output from the mode-locked semiconductor laser diode may first be supplied to a pulse compressor, and the resulting compressed pulses supplied to the Auston switch. Preferably, the mode-locking of the semiconductor laser diode is controllable, i.e., it is an active mode-locking semiconductor laser, so that the phase of the output optical signal from the laser is locked to the phase of an input control signal.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: April 19, 2011
    Assignee: Alcatel-Lucent USA Inc.
    Inventor: Lothar Benedict Erhard Josef Moeller
  • Patent number: 7903698
    Abstract: Systems and methods herein provide for the controlled formation of plasma filaments. For example, a system that radiates energy through a gas includes a laser that generates a laser pulse, and an optical element with which the laser propagates the laser pulse to control placement of an optical filament within a beam cross-section of the laser pulse. The optical filament may thereby generate a plasma filament, which may propagate energy. In this regard, an energy source may provide energy such that the plasma filament directs propagation of the energy for delivery to an application. The energy may be electrical energy, electromagnetic energy, optical energy, or a combination thereof. Generally, the optical element may impart at least one phase singularity within the laser pulse. Alternatively or additionally, the optical element may include at least one optical inhomogeneity.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: March 8, 2011
    Assignee: Applied Energetics, Inc
    Inventors: Paul Lundquist, Stephen William McCahon
  • Patent number: 7876805
    Abstract: A dynamic compensator for a fiber optic cable having a jacket which is centered along a longitudinal axis, an elongated buffer tube surrounded by the jacket, and an elongated fiber surrounded by the buffer tube and dimensioned to move radially inwards and outwards within the buffer tube. The dynamic compensator includes a cable holder configured to receive and loop a portion of the fiber optic cable so that when the jacket elongates, the fiber extending along the loop is displaced radially inwards so as to release stresses upon end portions of the fiber, and when the jacket shrinks, the fiber is displaced radially outward to increase stresses upon the end portions of the fiber.
    Type: Grant
    Filed: June 18, 2009
    Date of Patent: January 25, 2011
    Inventors: Valentin P Gapontsev, Valentin Fomin, Andrey Abramov, Dimitri Yagodkin
  • Publication number: 20100296536
    Abstract: A laser diode lighting device for use in and powered through an incandescent, halogen, or fluorescent light bulb alternating current socket is provided. The lighting device includes a laser diode light, a regulation circuit and a base. The regulation circuit converts an alternating current input to a direct current output. The base is adapted to fit within a conventional light bulb alternating current socket. In addition to the laser diode light, regulation circuit and base, the invention can further include a heat sink that removes heat from the laser diode light, regulation circuit and combinations thereof The laser diode light, regulation circuit, base, and heat sink take the form of a lighting device that is exchangeable with conventional light bulbs in traditional lighting fixtures.
    Type: Application
    Filed: May 23, 2009
    Publication date: November 25, 2010
    Inventor: CHRIS TAO
  • Patent number: 7806094
    Abstract: An apparatus is provided for the ignition of a fuel/air mixture in the combustion chamber of a combustion machine, wherein the combustion chamber has at least one inlet valve and at least one outlet valve. There are further provided a laser light generating device for giving off laser light and a combustion chamber window for coupling the laser light into a combustion chamber of the combustion machine. There is provided at least one fluid feed means which is separate from the inlet valve or valves and with which a fluid can be caused to flow at least on to regions of the surface of the combustion chamber window or between the combustion chamber window and the focal point of the laser light.
    Type: Grant
    Filed: December 15, 2008
    Date of Patent: October 5, 2010
    Assignee: GE Jenbacher GmbH & Co. OHG
    Inventor: Friedrich Gruber
  • Patent number: 7804868
    Abstract: A chip carrier having improver thermal properties, wherein the chip carrier may be formed having waist section, and a first transverse end portion joined to the waist section. A first surface of the carrier being configured to receive a chip thereon, and a second surface of the carrier configured to be coupled to a thermal control unit to provide cooling of the carrier and chip. The chip carrier may have a second transverse end portion joined to the waist portion in certain embodiments.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: September 28, 2010
    Assignee: Intel Corporation
    Inventors: William J. Kozlovsky, Andrew J. Daiber, Kevin A. Sawyer
  • Patent number: 7772615
    Abstract: Semiconductor electrooptic medium shows behavior different from a medium based on quantum confined Stark Effect. A preferred embodiment has a type-II heterojunction, selected such, that, in zero electric field, an electron and a hole are localized on the opposite sides of the heterojunction having a negligible or very small overlap of the wave functions, and correspondingly, a zero or a very small exciton oscillator strength. Applying an electric field results in squeezing of the wave functions to the heterojunction which strongly increases the overlap of the electron and the hole wave functions, resulting in a strong increase of the exciton oscillator strength. Another embodiment of the novel electrooptic medium includes a heterojunction between a layer and a superlattice, wherein an electron and a hole in the zero electric field are localized on the opposite sides of the heterojunction, the latter being effectively a type-II heterojunction.
    Type: Grant
    Filed: August 7, 2008
    Date of Patent: August 10, 2010
    Assignee: Connector Optics
    Inventors: Nikolai Ledentsov, Vitaly Shchukin
  • Patent number: 7751458
    Abstract: Array comprising high power laser diode comprising laser light emitters, each defining, in a direction perpendicular to direction of propagation of an output laser beam, a fast axis and a slow axis; fast axis collimating means for collimating output laser beams in fast axis direction; and slow axis beam shaping means for collimating or focussing output laser beams in slow axis direction, said slow axis beam shaping means disposed external to said high power laser diode; wherein said laser light emitters are displaced relative to each other in fast axis direction or in fast and slow axis direction by equidistant spacings, respectively; and including optical means for forming output laser beam profile in far field of all laser light emitters consisting of said fast and slow axis collimated or focussed output laser beams arranged adjacently in seamless manner in one or two dimensions with optical fill factor of about 100%.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: July 6, 2010
    Assignee: Fraunhofer USA, Inc. Center for Laser Technology
    Inventors: Boris Regaard, Thorsten Schmidt, Stefan Heinemann
  • Publication number: 20100090057
    Abstract: An apparatus which exhibits properties allowing it to levitate and travel utilizing magnetic energy.
    Type: Application
    Filed: October 15, 2008
    Publication date: April 15, 2010
    Inventor: Regina B. Liska
  • Patent number: 7684453
    Abstract: A surface light emitting semiconductor laser element, comprises a substrate, a lower reflector including a semiconductor multi-layer disposed on the substrate, an active layer disposed on the lower reflector, an upper reflector including a semiconductor multi-layer disposed on the active layer, a compound semiconductor layer having a first opening for exposing the upper reflector and extending over the upper reflector, and a metal film having a second opening for exposing the upper reflector disposed inside of the first opening and extending over the compound semiconductor layer, wherein the metal film and the compound semiconductor layer constitute a complex refractive index distribution structure where a complex refractive index is changed from the center of the second opening towards the outside. A method of emitting laser light in a single-peak transverse mode is also provided.
    Type: Grant
    Filed: May 18, 2004
    Date of Patent: March 23, 2010
    Assignee: Sony Corporation
    Inventors: Yoshiaki Watanabe, Hironobu Narui, Yuichi Kuromizu, Yoshinori Yamauchi, Yoshiyuki Tanaka
  • Patent number: 7645982
    Abstract: A system and method for calibrating laser designator and rangefinder test sets. The system includes a high speed detector module which receives a laser input signal, and outputs a laser output signal and an electrical pulse shaped output. A variable attenuator module receives the laser output signal and includes a rotating waveplate which rotates a polarization of the received laser output signal and a Glan laser polarizing beam splitter which receives the rotated laser output signal. The polarizing beam splitter passes only vertically polarized portions of the rotated laser output signal. An energy detector module receives the vertically polarized portions of the rotated laser output signal and includes a beam splitter which splits the vertically polarized portions of the rotated laser output signal into a first path pulse and a second path pulse. The second path pulse and the electrical pulse shaped output are used to calibrate a laser designator/rangefinder test set.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: January 12, 2010
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Daniel Wayne King
  • Patent number: 7643523
    Abstract: Aspects of the present invention are directed to the use of optical gain structures that include alternating layers of gain medium and transparent heat conductors in which the gain medium itself functions as a correction optic. The gain medium changes to an optimum or desired shape because of the thermal changes occurring as the materials of the optical gain structure(s) reach a desired optical output condition. At the desired optical output conditions, the gain medium conforms to a desired shape. The desired shape may be, for example, that of an optical surface of a transparent heat conductor. By designing the initial shape of the gain medium such that the physical contact with the transparent heat conductor is maximized at the desired optical output conditions, conductive heat transfer between the gain medium and heat conductor(s) is maximized at the desired optical output condition.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: January 5, 2010
    Assignee: Textron Systems Corporation
    Inventors: Hsian P. Chou, Yu-Lin Wang
  • Patent number: 7609919
    Abstract: The invention describes the method and apparatus for enhancement of coupling efficiency in effective-ridge laterally-coupled surface-etched grating waveguide structures, where a slab waveguide has a sequence of the periodic parallel segmented trenches etched from its top surface, such that the segments of intact material having higher refractive index than that in the surrounding segments of periodic trenches form the effective ridges which confine the optical field in and around these ridges, on one hand, and provide bidirectional coupling for the confined modes experiencing Bragg reflection from the segments of the periodic trenches, on the other.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: October 27, 2009
    Assignee: Onechip Photonics
    Inventors: Valery Tolstikhin, Kirill Pimenov
  • Patent number: 7599404
    Abstract: A composite optic fibre for laser includes a core surrounded with a pump guiding sheath in contact with the core, sheath being a photonic structure formed by a substantially regular matrix assembly of coaxial capillaries, spaced apart and arranged parallel to the core, the core being a material with doping elements which may be brought into at least one excited electronic state by absorbing the energy from a pump optical signal of a first determined wavelength running through the core and capable of giving-back the former by de-energization in the form of an optical signal of a second determined wavelength, the core having a determined diameter and the sheath having a determined diameter. The diameter of the guiding sheath is greater than the core diameter and smaller than or equal to four times the core diameter, the core diameter being greater than or equal to 35 micrometers.
    Type: Grant
    Filed: July 26, 2005
    Date of Patent: October 6, 2009
    Assignees: Centre National de la Recherche Scientifique, Universite de Bordeaux 1
    Inventors: Fran├žois Salin, Jens Limpert
  • Patent number: 7577177
    Abstract: A laser chamber is provided that increases power, initiation, and discharge efficiency over single chamber lasers by providing a multi-fold laser chamber, protrusions, discharge segmentation and inversion techniques.
    Type: Grant
    Filed: January 12, 2005
    Date of Patent: August 18, 2009
    Assignee: Videojet Technologies Inc.
    Inventor: Nathan Paul Monty
  • Patent number: 7561611
    Abstract: The invention is directed to elements used in high power laser lithographic systems operating at below 250 nm, and in particular to elements that have a coating of selected materials to extend lifetime of the elements; and to a method of preparing the extended lifetime elements. The invention is particularly directed to gratings and mirrors that are coated with silicon dioxide, aluminum oxide or fluorinated silicon dioxide. The coatings of the invention attain their extended life as a result of being deposited while being simultaneously bombarded with an energetic ion plasma.
    Type: Grant
    Filed: February 3, 2005
    Date of Patent: July 14, 2009
    Assignee: Corning Incorporated
    Inventor: Robert L. Maier
  • Patent number: 7561605
    Abstract: Methods, devices and systems for generating ultrashort optical linear chirped pulses with very high power by amplifying the pulses so that their temporal duration is longer than the storage time of the amplifying medium. The additional gain factor is related to the ratio of the storage time to the stretched pulse. A preferred embodiment connects a mode locked laser source that generates optical pulses whose duration is stretched with a chirped fiber Bragg grating. Embodiments include methods, devices and systems causing an extreme chirped pulse amplifier (XCPA) effect in an oscillator.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: July 14, 2009
    Assignee: University of Central Florida Research Foundation, Inc
    Inventors: Peter J. Delfyett, Kyungbum Kim, Bojan Resan
  • Patent number: 7558302
    Abstract: Methods, devices and systems for generating ultrashort optical linear chirped pulses with very high power by amplifying the pulses so that their temporal duration is longer than the storage time of the amplifying medium. The additional gain factor is related to the ratio of the storage time to the stretched pulse. A preferred embodiment connects a mode locked laser source that generates optical pulses whose duration is stretched with a chirped fiber Bragg grating. Embodiments include methods, devices and systems causing an extreme chirped pulse amplifier (XCPA) effect in an oscillator.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: July 7, 2009
    Assignee: University of Central Florida Research Foundation, Inc.
    Inventors: Peter Delfyett, Kyungbum Kim, Bojan Resan
  • Patent number: 7548569
    Abstract: A high-power optically end-pumped external-cavity semiconductor laser is provided having a laser chip including an active layer and a distributed Bragg reflector (DBR) for emitting light of a fundamental wavelength; an external mirror spaced apart from a first surface of the laser chip and forming a cavity resonator with the DBR; a second harmonic generation (SHG) crystal positioned between the external mirror and the laser chip; and a micro-lens integrated heat sink dissipating heat generated by the laser chip and bonded to a second surface of the laser chip to focus a pumping beam to be incident on the second surface of the laser chip.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: June 16, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Gi-bum Kim, Soo-haeng Cho, Taek Kim
  • Patent number: 7548575
    Abstract: An apparatus and method for combining a plurality of laser beams to form a single output beam comprising employing a plurality of lasers and optically connecting an image rotator and recoupler to each of the plurality of lasers.
    Type: Grant
    Filed: May 24, 2006
    Date of Patent: June 16, 2009
    Assignee: Lockheed Martin Corporation
    Inventors: Paul E. Jackson, Gary C. Vanstone, Edward J. Miesak
  • Patent number: 7535935
    Abstract: A laser system for a spectroscopic catheter system uses multiple semiconductor gain media having gain peaks at different wavelengths. The output from the gain media is preferably coupled into single-mode fiber using conventional opto-electronic packaging techniques. As a result, the laser oscillator source has a spectral output that is wider than the gain bandwidth of a single medium to enable it to access the entire spectrum of interest, which is presently in the near infrared. Moreover, the semiconductor gain media can be packaged in a stable and controlled environment for long-term performance.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: May 19, 2009
    Assignee: InfraReDx, Inc.
    Inventor: Jeffrey A. Korn
  • Patent number: 7530832
    Abstract: To provide a laser light source unit, a display device, a scanning display device and a projector, in each of which, when a laser is taken out of the chassis or the like, a laser thereof is assuredly rendered incapable of emitting. The laser light source unit includes a laser light source portion 10 having a light oscillation portion 12 emitting light, a fixing member that fixes the laser light source portion 10, an interrupting means that, simultaneously with a movement of removing the laser light source portion 10 off the fixing member, interrupts a current path for supplying a current to the light oscillation portion 12 in the laser light source portion 10.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: May 12, 2009
    Assignee: Seiko Epson Corporation
    Inventors: Takashi Takeda, Hiroshi Shingu
  • Patent number: 7520679
    Abstract: An optoelectronic package or sub-assembly includes an edge-emitting laser and a reflector that directs a beam from the laser through a sub-mount. The sub-mount contains passive or active circuit elements that are electrically connected to the laser. The laser can be protected from the environment using either a cap in which the reflector is integrated or using an encapsulant encasing the laser. An alignment post that is sized to fit into a sleeve is mounted where the optical signal emerges from the sub-mount. Plugging the post into one end of the sleeve and inserting an optical fiber into the other end of the sleeve so that the optical fiber abuts the post will then align the optical fiber to receive the optical signal.
    Type: Grant
    Filed: September 19, 2003
    Date of Patent: April 21, 2009
    Assignee: Avago Technologies Fiber IP (Singapore) Pte. Ltd.
    Inventors: Kendra Gallup, Brenton A. Baugh, Robert E. Wilson, James A. Matthews, Christopher L. Coleman, Tanya J. Snyder, James H. Williams
  • Patent number: 7515346
    Abstract: Arrangements for combination and fast-axis alignment of fast-axes of diode-laser beams are disclosed. Alignment arrangements include providing each diode-laser with a corresponding alignable fast-axis collimating lens, providing individually alignable mirrors for steering an re-orienting beams from each diode-laser, and providing single diode-laser slab-modules in which the diode-laser beams can be pre-aligned to a common propagation-axis direction, and in which edges and surfaces of the slabs can be used to align the fast and slow-axes of the beams. Beam combination methods include combination by dichroic elements, polarization-sensitive elements, and optical fiber bundles.
    Type: Grant
    Filed: July 18, 2006
    Date of Patent: April 7, 2009
    Assignee: Coherent, Inc.
    Inventors: Sergei V. Govorkov, Douglas William Anthon
  • Patent number: RE41690
    Abstract: Method of processing, e.g., laser annealing, objects such as semiconductor devices with pulsed lasers with high production yield and high reproducibility so as to obtain good characteristics stably. The pulse width of the irradiated pulse beam is set to more than 30 nsec to stabilize the processing. To achieve a pulse width exceeding 30 nsec, plural lasers are connected in series or in parallel and excited successively.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: September 14, 2010
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Hongyong Zhang