Window, Aperture, And Mask Patents (Class 372/103)
  • Patent number: 10483720
    Abstract: A laser device is provided for generating a helical-shaped optical wave and includes: (i) a gain region located between one first end defined by a first mirror and a second end defined by an exit region, (ii) a second mirror arranged so as to form with the first mirror an optical cavity including the gain region and a gap between the exit region and the second mirror, (iii) apparatus for pumping the gain region so as to generate the optical wave, wherein the laser device further includes at least one apparatus for shaping the light intensity and/or phase profiles of the optical wave and arranged for selecting at least one rotary-symmetrical transverse mode of the optical wave, the rotary-symmetrical transverse mode being chosen between those with a radial index equal to zero and with an azimuthal index being an integer with a module higher or equal to 1.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: November 19, 2019
    Inventors: Arnaud Garnache-Creuillot, Mikhael Myara, Isabelle Sagnes, Luc Le Gratiet, Mohammed Sellahi, Mohammed Seghilani, Philippe Lalanne
  • Patent number: 10362665
    Abstract: Methods and apparatus for generation of radiation by high harmonic generation, HHG. The apparatus comprises: a chamber for holding a vacuum, the chamber comprising a radiation input, a radiation output and an interaction region at which, in use, a medium is present, the chamber being arranged such that, in use, when driving radiation propagates through the radiation input and is incident upon the medium, the medium emits radiation via HHG, the emitted radiation propagating through the radiation output; and at least one plasma generator at the radiation input and/or the radiation output for generating a plasma volume allowing the driving radiation and emitted radiation, respectively, to propagate through the plasma volume.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: July 23, 2019
    Assignee: ASML Netherlands B.V.
    Inventors: Petrus Wilhelmus Smorenburg, Gerrit Jacobus Hendrik Brussaard, Vadim Yevgenyevich Banine
  • Patent number: 10323934
    Abstract: An optical protractor that employs a spiral phase plate resonator (SPPR) device for measuring a roll angle between two points on a static surface or a rotating surface. The protractor includes a tunable laser source that generates a laser beam. The SPPR device is responsive to the laser beam, and includes opposing reflective surfaces that reflect the beam back and forth in the device, where one of the reflective surfaces includes a spiral step index that causes multiple reflected beams having different phases to be combined as an output beam from the device having an optical vortex intensity pattern defined by the phases of the multiple beams, and where the intensity pattern includes radial light intensity lines. The protractor includes a lens that projects the output beam onto the element and the intensity pattern is detected to measure the roll angle.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: June 18, 2019
    Assignee: Northrop Grumman Systems Corporation
    Inventor: Yisa S. Rumala
  • Patent number: 10312655
    Abstract: An excimer laser generator and an excimer laser annealing equipment are disclosed to improve the convenience of window replacement, improve the replacement efficiency and reduce the gas waste. The excimer laser generator includes a reflector, an active medium cavity and an output mirror arranged in sequence. The active medium cavity has a first opening facing the reflector and a second opening facing the output mirror. The excimer laser generator further includes two replacement units respectively arranged between the first opening and the reflector, and between the second opening and the output mirror. Each of the replacement units includes a support plate and a driving component. The support plate is provided with a plurality of windows, and the driving component is adapted for driving the support plate so that one of the plurality of windows seals a corresponding opening.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: June 4, 2019
    Inventors: Yin Xie, Zubin Lv, Yu Zhang, Yongzhou Ling, Yayu Wang, Jingshuai Wang, Chenliang Liu, Rujian Li, Kang Luo
  • Patent number: 10295768
    Abstract: One example embodiment includes an optical subassembly (OSA). The OSA includes a leadframe circuit, an optical port, and an active optical component subassembly. The active optical component subassembly is mounted to the leadframe circuit. The optical port is mechanically coupled to the leadframe circuit.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: May 21, 2019
    Assignee: Finisar Corporation
    Inventors: Wendy Pei Fen Lau, Paul Thien Vui Chia, Yunpeng Song, Tat Ming Teo, Yew-Tai Chieng
  • Patent number: 10253933
    Abstract: A light emitting device includes: a base; a laser element disposed on an upper face of the base and adapted to laterally emit a laser beam; a phosphor member disposed on the upper face of the base; a first optical member disposed on the upper face of the base, the first optical member comprising an entry-side lateral face through which the laser beam enters during use and an exit-side lateral face through which the laser beam exits during use, and the first optical member being configured to change a traveling direction of the laser beam such that the laser beam transmitted through the first optical member irradiates an upper face of the phosphor member; and a cap comprising: a light shielding member, and a light transmissive member located over the through hole, the laser element, the phosphor member, and the first optical member.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: April 9, 2019
    Inventors: Seiji Kiyota, Eiichiro Okahisa
  • Patent number: 10063805
    Abstract: A data-encoding system includes a source of unencoded data, and a first encoder interoperably coupled to the source, wherein the first encoder is adapted to receive the unencoded data, encode the unencoded data, and output encoded data at a first data rate. The data encoding system further includes a second encoder interoperably coupled to the source, wherein the second encoder is adapted to receive the unencoded data, encode the unencoded data, and output encoded data at a second data rate in which the second data rate exceeds the first data rate. This Abstract is provided to comply with rules requiring an Abstract that allows a searcher or other reader to quickly ascertain subject matter of the technical disclosure. This Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: August 28, 2018
    Assignee: WatchGuard, Inc.
    Inventors: Robert V. Vanman, Simon Christopher Goble
  • Patent number: 10056732
    Abstract: A housing for an optically pumped semiconductor (OPS) laser resonator is terminated at one end thereof by an OPS-chip. The laser resonator is assembled on a platform with the OPS-chip at one end of the platform. The platform is fixedly attached to a baseplate at the OPS-chip end of the platform. The remainder of the platform extends over the baseplate with a gap between the platform and the baseplate. A pump-laser is mounted directly on the baseplate and delivers pump radiation to the OPS-chip.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: August 21, 2018
    Assignee: Coherent, Inc.
    Inventor: Jeffrey Alan Wisdom
  • Patent number: 9972965
    Abstract: An apparatus and a method for stabilizing output of a light source are disclosed. The stabilization device located outside of a light source comprises a stabilization element, and a stabilization controller configured to control a light output from the light source so that a part of the light output and other part of the light cross propagate in the stabilization element.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: May 15, 2018
    Assignee: Myongji University Industry and Academia Cooperation Foundation
    Inventors: Dong Sun Seo, Yong Yuk Won
  • Patent number: 9703045
    Abstract: Systems and methods to stabilize a laser frequency include a birefringent resonator that introduces an arbitrary phase difference between two polarization components of the laser beam, a polarizing beam splitter to separate the two polarization components after the birefringent resonator, and a differential detector to monitor the separated two polarizations, based on which an error signal can be produced to control a servo to adjust the laser frequency or resonator resonance frequency accordingly. The birefringent resonator can comprise a fiber ring, a whispering gallery mode (WGM) resonator, or any other birefringent ring resonator. A servo can be included in the systems and methods to lock the laser frequency to the resonant frequency of the birefringent resonator or to lock the resonator resonant frequency to the laser frequency. One or more polarization controllers can also be employed to adjust the polarization state of the laser beam.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: July 11, 2017
    Assignee: Massachusetts Institute of Technology
    Inventors: Matthew John Evans, Adam Alexander Libson, Aaron Buikema, Nicolas Brown
  • Patent number: 9647414
    Abstract: A laser and methods for providing a continuous wave output beam. The laser and method includes positioning a micro-plasma chip capable of creating micro-plasmas within a resonant cavity. A gas is input into the resonant cavity and flows around the micro-plasma chip. Micro-plasmas ignite and excite the gas to create metastables. The metastables are further excited by an optical pump having an energy sufficient to cause the metastables to lase.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: May 9, 2017
    Assignee: Physical Sciences, Inc.
    Inventors: W. Terry Rawlins, Steven J. Davis, Kristin Galbally-Kinney, Jeffrey Hopwood, Alan Hoskinson
  • Patent number: 9502854
    Abstract: A self-seeding high power laser includes a spatial filter; an optical relay for circulating a low power un-distorted optical beam, an adaptive optic optically coupled to the output of the optical relay; a high power amplifier optically coupled to an output of the adaptive optic phase control element, wherein adaptively modified phasefront injected by the adaptive optic cancels distortions produced by the high power amplifier; a beamsplitter optically coupled to the high power amplifier for splitting the high power un-distorted optical beam into a high power output beam as the output of the self-seeding high power laser, and a low power beam; a focusing lens; a detector for detecting a metric of the low power beam; and a controller for adaptively controlling the adaptive optic to maximize the power of the high power amplifier, based on the detected metric.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: November 22, 2016
    Inventor: David M. Filgas
  • Patent number: 9497843
    Abstract: A plurality of gas jet nozzles having equal angular separation around a central axis eject gas flows towards the central axis. The gas flows collide and form a gas channel from the neutral gas, the gas channel having a gas density depression at the center of the intersecting gas flow, where the gas density depression is surrounded by a higher density gaseous wall along the central axis. Ionization of the gas in the center produces a plasma channel that can guide a laser pulse fired into the gas along the central axis. The geometric arrangement of the gas jets and/or the backing pressure of the gas flows are configured to produce a gas channel having a predetermined density profile such that the ionized gas forms a plasma channel laser guiding structure configured to guide a laser pulse having predetermined spatial parameters.
    Type: Grant
    Filed: May 12, 2016
    Date of Patent: November 15, 2016
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Dmitri Kaganovich, Michael H. Helle, John Palastro, Antonio C. Ting, Daniel F. Gordon, Yu-hsin Chen
  • Patent number: 9450367
    Abstract: A laser pulse amplifier device (100) includes an amplifying cavity (10) comprising an amplifying laser gain medium (11) and multiple cavity mirrors (12.1 to 12.7) spanning a cavity light path (13), wherein the amplifying cavity (10) is configured for an amplification of laser pulses (1) circulating along the cavity light path, and a multi-pass amplifier (20) being optically coupled with the amplifying cavity (10) and comprising multiple deflection mirrors (22) spanning a multipass light path (23), wherein the multi-pass amplifier (20) is configured for a post-amplification of laser pulses (2) coupled out of the amplifying cavity (10), wherein the amplifying cavity (10) and the multi-pass amplifier (20) are arranged such that the laser gain medium (11) of the amplifying cavity (10) is included as an active medium in the multi-pass light path (23) of the multi-pass amplifier (20). Furthermore, a method of amplifying laser pulses is described.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: September 20, 2016
    Assignees: Max-Planck-Gesellschaft zur Foerderung der Wissenschaften e.V., Ludwig-Maximilians-Universitaet Muenchen
    Inventors: Moritz Ueffing, Thomas Metzger, Ferenc Krausz
  • Patent number: 9424521
    Abstract: A computer-implemented system and method of analyzing spatial, temporal and contextual elements of data for predictive decision-making. The computer-implemented method includes receiving a first set of rules and receiving first data and second data including spatial, temporal and contextual elements. The computer-implemented method also includes identifying each rule of the first set for which the received first data and the received second data is a respective candidate. For the identified rules for which the received first data is a candidate, and for the identified rules for which the received second data is a candidate, the respective received first data and received second data is indexed by its temporal, spatial or contextual elements as a function of the identified rules. The computer-implemented method also includes identifying an event as satisfying an identified rule in memory using the indexed first and second data.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: August 23, 2016
    Assignee: Transvoyant, Inc.
    Inventors: Kirk Elliot Bloomquist, Christopher Park, Dennis William Groseclose
  • Patent number: 9231363
    Abstract: An optical amplifier includes a solid state gain-element. The gain-element is pumped by pump-radiation from a diode-laser bar. The diode-laser radiation is delivered from the diode-laser bar to the gain-element entirely via a tapered light-guide which guides the radiation only in a fast-axis direction of the diode laser bar. The tapering of the light-guide reduces fast-axis divergence of the pump-radiation by about a factor of ten. The pump-radiation is delivered to the gain-element as a line of radiation homogenized in the fast-axis direction.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: January 5, 2016
    Assignee: Coherent, Inc.
    Inventors: Michael Hertwig, Sergei Govorkov
  • Patent number: 9063117
    Abstract: This invention provides new methods and apparatus for rapidly analyzing single bioparticles to assess their material condition and health status. The methods are enabled by a resonant cavity to measure optical properties related to the bioparticle size and refractive index. Refractive index measurements are useful for determining material properties and biomolecular composition of the bioparticle. These properties and composition are dependent on the health state of the bioparticle. Thus, measured optical properties can be used to differentiate normal (healthy) and abnormal (diseased) states of bioparticles derived from cells or tissues. The methods are illustrated with data obtained from a resonator with a gain medium.
    Type: Grant
    Filed: December 24, 2011
    Date of Patent: June 23, 2015
    Inventor: Paul L. Gourley
  • Patent number: 9042690
    Abstract: A light source for a photonic integrated circuit may comprise a reflection coupling layer formed on a substrate in which an optical waveguide is provided, at least one side of the reflection coupling layer being optically connected to the optical waveguide; an optical mode alignment layer provided on the reflection coupling layer; and/or an upper structure provided on the optical mode alignment layer and including an active layer for generating light and a reflection layer provided on the active layer. A light source for a photonic integrated circuit may comprise a lower reflection layer; an optical waveguide optically connected to the lower reflection layer; an optical mode alignment layer on the lower reflection layer; an active layer on the optical mode alignment layer; and/or an upper reflection layer on the active layer.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: May 26, 2015
    Inventors: Bok-ki Min, Taek Kim, Young-soo Park
  • Patent number: 9028070
    Abstract: Provided is a light-emitting element having high luminance and high directivity and emitting light in a controlled polarization state. The light-emitting element comprises substrate 3 and light emitting part 10 disposed on substrate 3 for emitting light in which light intensity of a polarization component in first direction x parallel to substrate 3 is higher than light intensities of polarization components in other directions. Light emitting part 10 includes active layer 12 for generating light and a plurality of structural bodies 14a disposed on a light-emitting side of light emitting part 10 with respect to active layer 12 and arrayed two-dimensionally along a surface substantially parallel to active layer 12. Each of structural bodies 14a has width w1 along first direction x and width w2 along second direction y perpendicular to first direction x, width w1 along first direction x and width w2 along second direction y being different from each other in a cross section parallel to active layer 12.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: May 12, 2015
    Assignee: NEC Corporation
    Inventors: Mizuho Tomiyama, Ryuichi Katayama
  • Patent number: 9014231
    Abstract: A vertical cavity surface emitting laser (VCSEL) nanoscope is provided. The VCSEL nanoscope combines a VCSEL with a nano-scale aperture using a support member to separate the aperture from the VCSEL emission face. The resulting device is a useful near-field probe with a wide variety of applications.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: April 21, 2015
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Sonny Vo, James S. Harris, Jr.
  • Patent number: 8908739
    Abstract: A laser adjustment system can include an adjustable seed-beam restrictor, configured to be attachable to a stretcher-compressor in a transverse-adjustable manner, and to restrict an incidence of a seed beam, generated by an oscillator, on the stretcher-compressor, wherein the stretcher-compressor is configured to be integrated into a chirped pulse amplification laser engine, and to stretch a duration of seed pulses of the seed beam.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: December 9, 2014
    Assignee: Alcon LenSx, Inc.
    Inventor: Michael Karavitis
  • Patent number: 8897327
    Abstract: A laser diode device including a housing having a mounting area in a cavity of the housing, at least one laser diode chip that emits electromagnetic radiation through a radiation exit area during operation, at least one covering element which is transmissive, at least in places, to the electromagnetic radiation generated by the laser diode chip during operation, and a deflection element, that directs at least part of the electromagnetic radiation generated by the laser diode chip during operation in a direction of the covering element, wherein the radiation exit area of the laser diode chip runs substantially transversely or substantially perpendicularly with respect to the mounting area and/or with respect to the covering element, the covering element connects to the housing, and the covering element tightly closes the housing.
    Type: Grant
    Filed: April 15, 2013
    Date of Patent: November 25, 2014
    Assignee: OSRAM Opto Semiconductors GmbH
    Inventors: Karsten Auen, Uwe Strauss, Thomas Höfer
  • Patent number: 8855167
    Abstract: A gas discharge chamber that uses a calcium fluoride crystal which reduces a breakage due to mechanical stress (window holder and laser gas pressure), thermal stress from light absorption, and the like, increases the degree of linear polarization of output laser, and suppresses degradation due to strong ultraviolet (ArF, in particular) laser light irradiation. A first window (2) and a second window (3) of the gas discharge chamber have an incident plane and an emitting plane in parallel with a (111) crystal plane of their calcium fluoride crystal. With respect to an arrangement where laser light entering the calcium fluoride crystal passes through a plane including a <111> axis and a <001> axis of each of the first window (2) and the second window (3) as seen from inside the chamber (1), the first window (2) and the second window (3) are arranged in positions rotated in the same direction by the same angle about their <111> axis.
    Type: Grant
    Filed: June 29, 2013
    Date of Patent: October 7, 2014
    Assignee: Gigaphoton Inc.
    Inventors: Shinji Nagai, Fumika Yoshida, Osamu Wakabayashi, Kouji Kakizaki
  • Patent number: 8855166
    Abstract: A system and method of operating a high repetition rate gas discharge laser system. The system includes a gas discharge chamber having a hot chamber output window heated by the operation of the gas discharge laser chamber, an output laser light pulse beam path enclosure downstream of the hot chamber window and comprising an ambient temperature window, a cooling mechanism cooling the beam path enclosure intermediate the output window and the ambient window. The gas discharge chamber can include a longitudinally and axially compliant ground rod, including a first end connected to a first chamber wall, a second end connected to a second chamber wall, the second chamber wall opposite the first chamber wall and a first portion formed into a helical spring, the ground rod providing mechanical support for a preionizer tube.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: October 7, 2014
    Assignee: Cymer, LLC
    Inventors: Richard C. Ujazdowski, Richard M. Ness, J. Martin Algots, Vladimir B. Fleurov, Frederick A. Palenschat, Walter D. Gillespie, Bryan G. Moosman, Thomas D. Steiger, Brett D. Smith, Thomas E. McKelvey
  • Patent number: 8848749
    Abstract: A light radiating device capable of reducing production costs and preventing sealing defects for a display device, and a method of fabricating an organic light emitting diode (OLED) display device using the same are provided. The light radiating device includes a light source to generate light and a light modifier, including a transmissive region and a non-transmissive region, that define an exposure region on a substrate. The method includes applying a frit to at least one of a first substrate having a pixel region and a second substrate, plasticizing the frit, and aligning the first substrate, the second substrate, and a light radiating device to define an exposure region on the at least one of the first substrate and the second substrate, and radiating the light to the frit to couple the first substrate and the second substrate.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: September 30, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Tae-Wook Kang
  • Patent number: 8824516
    Abstract: In a GaN-based laser device having a GaN-based semiconductor stacked-layered structure including a light emitting layer, the semiconductor stacked-layered structure includes a ridge stripe structure causing a stripe-shaped waveguide, and has side surfaces opposite to each other to sandwich the stripe-shaped waveguide in its width direction therebetween. At least part of at least one of the side surfaces is processed to prevent the stripe-shaped waveguide from functioning as a Fabry-Perot resonator in the width direction.
    Type: Grant
    Filed: September 6, 2013
    Date of Patent: September 2, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshiyuki Kawakami, Tomoki Ono, Shigetoshi Ito, Susumu Omi
  • Publication number: 20140044144
    Abstract: A vertical cavity surface emitting laser (VCSEL) nanoscope is provided. The VCSEL nanoscope combines a VCSEL with a nano-scale aperture using a support member to separate the aperture from the VCSEL emission face. The resulting device is a useful near-field probe with a wide variety of applications.
    Type: Application
    Filed: February 4, 2013
    Publication date: February 13, 2014
    Applicant: The Board of Trustees of the Leland Stanford Junior University
    Inventor: The Board of Trustees of the Leland Stanford Junior University
  • Patent number: 8548023
    Abstract: A semiconductor laser element includes a laminate composed of a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer; and a second embedded layer that is in contact with the second conductivity type semiconductor layer, has a stripe-like groove parallel to the cavity direction, and is composed of an insulator, the groove is embedded with a first embedded layer composed of a dielectric on the cavity end face side, and with a conductive layer on the inside.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: October 1, 2013
    Assignee: Nichia Corporation
    Inventors: Shinya Sonobe, Shingo Masui
  • Patent number: 8537874
    Abstract: An array of vertical-cavity surface emitting lasers (VCSELs) may be fabricated with very high fill-factors, thereby enabling very high output power densities during pulse, quasi-continuous wave (QCW), and continuous wave (CW) operation. This high fill-factor is achieved using asymmetrical pillars in a rectangular packing scheme as opposed prior art pillar shapes and packing schemes. The use of asymmetrical pillars maintains high efficiency operation of VCSELs by maintaining minimal current injection distance from the metal contacts to the laser active region and by maintaining efficient waste heat extraction from the VCSEL. This packing scheme for very high fill-factor VCSEL arrays is directly applicable for next generation high-power, substrate removed, VCSEL arrays.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: September 17, 2013
    Assignee: Flir Systems, Inc.
    Inventors: Chad Wang, Jonathan Geske
  • Patent number: 8477825
    Abstract: Multi-pass optical imaging apparatus includes a concave mirror in combination with two retro-reflecting mirror pairs and at least one reflective surface. The mirror, the retro-reflecting mirror pairs and the reflecting surface are arranged such that a light-ray input into the apparatus parallel to and spaced apart from the optical axis of the concave mirror and incident on the concave mirror is caused to be incident on the thin-disk gain-medium at least four times, with each of the four incidences on the gain-medium being from a different direction. If the input ray is plane-polarized, the arrangement provides that the polarization orientation of the ray on each incidence on the gain-medium is in the same orientation.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: July 2, 2013
    Assignee: Coherent, Inc.
    Inventors: Michael Hertwig, Norman Hodgson
  • Patent number: 8270450
    Abstract: A method of manufacturing a semiconductor laser having an end surface window structure includes the steps of forming a groove near at least the formation position of the end surface window structure of a substrate, and growing a nitride-based group III-V compound semiconductor layer including an active layer formed of a nitride-based group III-V compound semiconductor including at least In and Ga on the substrate.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: September 18, 2012
    Assignee: Sony Corporation
    Inventors: Junji Sawahata, Masaru Kuramoto, Osamu Goto
  • Patent number: 8233511
    Abstract: A high average power laser system with modulated gain suppression includes an input aperture associated with a first laser beam extraction path and an output aperture associated with the first laser beam extraction path. The system also includes a pinhole creation laser having an optical output directed along a pinhole creation path and an absorbing material positioned along both the first laser beam extraction path and the pinhole creation path. The system further includes a mechanism operable to translate the absorbing material in a direction crossing the first laser beam extraction laser path and a controller operable to modulate the second laser beam.
    Type: Grant
    Filed: May 18, 2010
    Date of Patent: July 31, 2012
    Assignee: Lawrence Livermore National Security, LLC
    Inventor: Andrew James Bayramian
  • Patent number: 8218587
    Abstract: Embodiments are directed to systems and methods for adjusting a wavelength, bandwidth or both. Such systems and methods may be applicable to laser beams within a laser cavity or amplifier. For some embodiments, such systems and methods may be used to allow a user to set a desired wavelength and bandwidth of a short pulse laser system for operation at those parameters without further adjustment by the user.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: July 10, 2012
    Assignee: Newport Corporation
    Inventors: Ventzislav Stoev, Kevin Holsinger, David S. Bell, Olaf Korth
  • Patent number: 8170076
    Abstract: In a GaN-based laser device having a GaN-based semiconductor stacked-layered structure including a light emitting layer, the semiconductor stacked-layered structure includes a ridge stripe structure causing a stripe-shaped waveguide, and has side surfaces opposite to each other to sandwich the stripe-shaped waveguide in its width direction therebetween. At least part of at least one of the side surfaces is processed to prevent the stripe-shaped waveguide from functioning as a Fabry-Perot resonator in the width direction.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: May 1, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Toshiyuki Kawakami, Tomoki Ono, Shigetoshi Ito
  • Publication number: 20120099615
    Abstract: Provided are a laser induced thermal imaging (LITI) mask, a laser irradiation apparatus including the LITI mask, and a method of manufacturing an organic light emitting device by using the LITI mask. The LITI mask including an opening corresponding to a pixel region and an opening corresponding to an edge of a pixel is used to form an organic layer in an upper portion of a substrate of an organic light emitting device, thereby transferring the organic layer to an edge of the pixel region.
    Type: Application
    Filed: August 31, 2011
    Publication date: April 26, 2012
    Inventors: Jin-Won Sun, Tae-Min Kang, Sok-Won Noh, Min-Chul Suh
  • Patent number: 8152307
    Abstract: A optical apparatus (201) for use in an laser imaging system (200) is provided. The optical apparatus (201) includes one or more optical elements (215) that are configured to create an intermediate image plane (217) in the laser imaging system (200). A diffractive optical element (216) is then disposed at the intermediate image plane (217) to reduce speckle. The diffractive optical element (216) includes a periodically repeating phase mask (218) that can be configured in accordance with steps, vortex functions, Hermite-Gaussian functions, and so forth. Smooth grey-level phase transitional surface (337) can be placed between elements (333,334) to improve brightness and image quality. The periodically repeating phase mask (218) makes manufacture simple by reducing alignment sensitivity, and can be used to make applicable safety standards easier to meet as well.
    Type: Grant
    Filed: December 21, 2009
    Date of Patent: April 10, 2012
    Assignee: Microvision, Inc.
    Inventors: Markus Duelli, Alban N. Lescure, Mark O. Freeman, Christian Dean DeJong, Joshua M. Hudman
  • Patent number: 8135053
    Abstract: The present disclosure relates to a laser crystal device (1) for short pulse lasers, comprising a container (4), the interior of which is sealed relative to the environment and which contains a technically pure atmosphere with windows (12, 13) in the side walls (12, 13) for the passage of laser radiation (16), which in operation passes through a laser crystal (6), wherein the window (12, 13) has an inclination of the Brewster angle to the beam path of the laser radiation (16) and a mounting (5) for the laser crystal (6) is provided within the container (4), the windows (12, 13) are inclined to each other by double the Brewster angle and are placed at an adequate distance from the laser crystal (6) position, with relation to the laser beam properties, wherein the beam cross section at the windows (12, 13) is sufficiently large in order to guarantee a peak intensity at the windows (12, 13) which is sufficiently reduced in relation to the peak intensity of the laser beam (16) at the laser crystal (6) for avoidin
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: March 13, 2012
    Assignee: Femtolasers Produktions GmbH
    Inventors: Andreas Assion, Andreas Stingl, Alfred Tomasch, Christian Warmuth
  • Patent number: 8009715
    Abstract: A mode selection technique in a laser is described wherein a recess is formed in a surface of a waveguide in the laser. The recess provides a region of free space propagation within the waveguide which preferentially selects the lowest order mode. A mode selective RF excited CO2 slab laser, having a stable resonator in the waveguide dimension and a negative branch unstable resonator in the non-waveguide dimension, is constructed and the position and size of the recess is considered to provide low order mode selection.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: August 30, 2011
    Assignee: Rofin-Sinar UK Ltd.
    Inventors: Gavin Alan James Markillie, Jason Robert Lee
  • Patent number: 7988297
    Abstract: Non-rigidly coupled, overlapping, non-feedback optical systems for spatial filtering of Fourier transform optical patterns and image shape characterization comprises a first optical subsystem that includes a lens for focusing a polarized, coherent beam to a focal point, an image input device that spatially modulates phase positioned between the lens and the focal point, and a spatial filter at the Fourier transform pattern, and a second optical subsystem overlapping the first optical subsystem includes a projection lens and a detector. The second optical subsystem is optically coupled to the first optical subsystem.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: August 2, 2011
    Assignee: Look Dynamics, Inc.
    Inventor: Rikk Crill
  • Patent number: 7983319
    Abstract: To provide surface-emitting type semiconductor lasers and methods of manufacturing the same in which the polarization direction of laser light can be readily controlled, a surface-emitting type semiconductor laser includes a vertical resonator above a substrate. The vertical resonator includes a first mirror, an active layer and a second mirror disposed in this order from the substrate. The vertical resonator has a plurality of unit resonators. An emission region of each of the unit resonators has a diameter that oscillates in a single-mode.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: July 19, 2011
    Assignee: Seiko Epson Corporation
    Inventors: Hitoshi Nakayama, Tsugio Ide, Tsuyoshi Kaneko
  • Patent number: 7965756
    Abstract: At least either of the light entering plane or the light exiting plane is parallel to the (111) crystal face of the CaF2 crystal and the laser beam entering from the entering plane passes through the plane located between the [111] axis and the first azimuth axis in the locus of rotation of the [001] axis around the [111] axis and including the [111] axis and the first azimuth axis, the plane located between the [111] axis and the second azimuth axis in the locus of rotation of the [010] axis around the [111] axis and including the [111] axis and the second azimuth axis or the plane located between the [111] axis and the third azimuth axis in the locus of rotation of the [100] axis around the [111] axis and including the [111] axis and the third azimuth axis and exits from the exiting plane.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: June 21, 2011
    Assignee: Gigaphoton Inc.
    Inventors: Osamu Wakabayashi, Shinji Nagai, Kouji Kakizaki, Satoshi Tanaka
  • Patent number: 7894494
    Abstract: An apparatus and method which may comprise a seed laser defining an optical cavity producing an output. An amplifier may amplify the seed laser output. A bandwidth error signal generator may provide a bandwidth error signal from measured bandwidth and a target. A bandwidth selection element, which may comprise an adjustable sized aperture external to the cavity of the seed laser may selectively alter the bandwidth of the seed laser output. A bandwidth control system may control the bandwidth control element and also selectively adjust a differential firing time between the seed laser and amplifier or another bandwidth selection actuator to cooperated (coarsely or finely) with the bandwidth selection element to control bandwidth of the laser system.
    Type: Grant
    Filed: April 9, 2008
    Date of Patent: February 22, 2011
    Assignee: Cymer, Inc.
    Inventor: Toshihiko Ishihara
  • Patent number: 7873084
    Abstract: A process and a device is described to avoid the depolarization of linear-polarized light during the transmission of light through crystals exhibiting a {111} or {100} crystal plane, respectively, and a <100> or <111> crystal axis, respectively. The device is characterized in that the linear-polarized light meets the surface of the crystals in an angle of 45-75°, whereby the surface is formed by the {111} or the {100} plane. The crystal is arranged in such a way that upon entering the crystal, the light spreads along the <100> or <111> crystal axis, respectively, as parallel as possible, and/or that the device comprises a unit for temperature equalization to avoid a thermal gradient in the crystal.
    Type: Grant
    Filed: October 18, 2007
    Date of Patent: January 18, 2011
    Assignee: Hellma Materials GmbH & Co. KG
    Inventors: Ute Natura, Martin Letz, Lutz Parthier
  • Patent number: 7852900
    Abstract: A cap 25 having a piece of glass 26 formed at a laser irradiating position and covering a laser irradiating direction and an upper face of a package 24, is mounted onto the package 24 having lateral faces of a frame body 30 formed in three directions other than the laser irradiating direction, so as to reduce the distance between a semiconductor element 22 and the piece of glass 26 and to reduce a radius 32 of the piece of glass 26. The profile of the semiconductor device can be therefore lowered while maintaining the characteristics of a semiconductor laser. In addition, by mounting the semiconductor device, the profile of an optical pickup device can also be lowered.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: December 14, 2010
    Assignee: Panasonic Corporation
    Inventors: Isao Hayami, Masaya Tateyanagi
  • Publication number: 20100277726
    Abstract: An apparatus for analyzing, identifying or imaging an target including an integrated dual laser module coupled to a pair of photoconductive switches to produce cw signals in the range of frequencies from 100 GHz to over 2 THz focused on and transmitted through or reflected from the target; and a detector for acquiring spectral information from signals received from the target and using a multi-spectral homodyne process to generate an electrical signal representative of some characteristics of the target with resolution less than 250 MHz. The photoconductive switches are activated by laser beams from the dual laser module. The lasers in the module are tuned to different frequencies and have two distinct low frequency identification tones respectively that are used in conjunction with a stable optical filter element to permit precise determination of the offset frequency of the lasers.
    Type: Application
    Filed: April 4, 2008
    Publication date: November 4, 2010
    Applicant: Emcore Corporation
    Inventors: Ronald T. Logan, JR., Joseph R. Demers, Bryon L. Kasper
  • Patent number: 7813407
    Abstract: Disclosed is a laser system that comprises a laser source adapted to emit a laser beam, wherein the laser source comprises a plurality of emitters for emitting respective beam contributions to the emitted laser beam; and first and second feedback means adapted to provide optical feedback to respective first and second parts of the emitted laser beam. The first feedback means is adapted to predominantly feed back a respective angular/directional contribution of each of said beam contributions into a corresponding one of the plurality of emitters from which said angular/directional contribution was emitted at a predetermined output angle, to cause each of the plurality of emitters to predominantly emit a beam contribution towards the second feedback means at an angle corresponding to the predetermined output angle.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: October 12, 2010
    Assignee: Danmarks Tekniske Universitet
    Inventors: Paul Michael Petersen, Birgitte Thestrup Nielsen
  • Patent number: 7792160
    Abstract: For performing hologram recording or reproduction, an oscillation wavelength half value width ?? of a coherent light source satisfies a relationship of ??<?2/(S×2 sin ?), where a substantial hologram size is S, a substantial cross angle between reference light and signal light is ?, and the oscillation wavelength of the coherent light source is ?. Even when stray light is generated, the coherent light source can suppress generation of an unnecessary interference fringe due to the stray light, and stably record and reproduce holograms.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: September 7, 2010
    Assignee: Panasonic Corporation
    Inventors: Kazuhisa Yamamoto, Kenichi Kasazumi, Tomoya Sugita, Tetsuro Mizushima, Shinichi Kadowaki
  • Patent number: 7778306
    Abstract: The invention relates to laser system with a laser source and an articulated arm. The articulated arm has an optical arrangement for guiding a laser beam from the laser source along an optical path in the articulated arm to a target location. Within the optical path at least one crossing area (focus or focal point) of the laser beam is provided. The optical arrangement has at least one optical cell with an input window and an output window for passing the laser beam therethrough, wherein the crossing area is positioned within the optical cell. The optical cell has a gas fill with an energy threshold for ionization that is increased in comparison to that of ambient air.
    Type: Grant
    Filed: April 22, 2008
    Date of Patent: August 17, 2010
    Assignee: Fotona d.d.
    Inventors: Marko Marincek, Boris Cencic
  • Patent number: 7775670
    Abstract: The present invention relates to a laser projection system (1) having means for reducing the coherence of a generated laser beam (3) in order to reduce the occurrence of annoying speckle artifacts in images produced by the system. Coherence is reduced by letting the laser beam (3) pass through a transparent cell (6) comprising first (A) and second (B) immiscible fluids having different refractive indices. The fluids are displaced in the cell, preferably using an electrowetting technique. The cell (6) may thus be realized as an electrowetting lens, which is driven with a pseudo random driving signal.
    Type: Grant
    Filed: August 25, 2005
    Date of Patent: August 17, 2010
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Renatus Hendricus Maria Sanders, Johannus Wilhelmus Weekamp
  • Patent number: 7775668
    Abstract: A color-mixing laser module is disclosed, which is comprised of a laser unit capable of emitting red, blue and green laser beams; a beam combiner, for receiving and converging the laser beams emitted from the laser unit and then directing the converged laser light to illuminate on a light pattern adjusting unit; and the light pattern adjusting unit, capable of receiving the converged laser light from the beam combiner for adjusting the pattern of the same.
    Type: Grant
    Filed: August 7, 2007
    Date of Patent: August 17, 2010
    Assignee: Industrial Technology Research Institute
    Inventors: Po-Hung Yao, Cheng-Huan Chen, Ya-Yu Nieh