Control Of Pulse Characteristics Patents (Class 372/25)
  • Patent number: 10403499
    Abstract: A laser polycrystallization apparatus including: a light source for emitting a laser beam; a diffraction grating for receiving the laser beam from the light source, changing a path and a magnitude of the received laser beam, and outputting the changed laser beam; a light split portion for splitting the laser beam received from the diffraction grating; and a light superposition portion for superposing the split laser beams received from the light split portion and irradiating the superposed split laser beams to a substrate. An angle between the laser beam irradiated to an incidence surface of the diffraction grating from the light source and a line substantially perpendicular to an emission surface of the diffraction grating is an acute angle.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: September 3, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Emil Aslanov, Jekil Ryu, Haesook Lee, Gyoowan Han
  • Patent number: 10390883
    Abstract: Methods and systems for the controlled generation of bubbles in a medium having a liquid phase are generally provided. Laser pulses having a time-dependent pulse parameter controllable over their duration are generated. The medium is irradiated with the laser pulses with a radiant exposure sufficient to initiate microcavitation within the medium during each laser pulse. The time-dependent pulse parameter of each laser pulse is controlled according to a generally positive variation over the pulse duration such that the medium absorbs a greater quantity of energy from the laser pulse at an end of the pulse duration than at a beginning thereof. Such methods and systems may be used for various applications such as biology, medicine or material processing.
    Type: Grant
    Filed: August 7, 2017
    Date of Patent: August 27, 2019
    Assignee: INSTITUT NATIONAL D'OPTIQUE
    Inventors: Pascal Deladurantaye, Ozzy Mermut
  • Patent number: 10290992
    Abstract: The laser system includes a first laser apparatus, a second laser apparatus, a charging voltage measuring unit configured to measure the charging voltage of the first storage capacitor and the charging voltage of the second storage capacitor, at least one bleeding circuit configured to reduce the charging voltage of the first storage capacitor and the charging voltage of the second storage capacitor, and a bleeding circuit controller configured to control the at least one bleeding circuit based on the voltage measured by the charging voltage measuring unit.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: May 14, 2019
    Assignee: Gigaphoton Inc.
    Inventors: Hiroshi Umeda, Osamu Wakabayashi
  • Patent number: 10267902
    Abstract: A method includes acquiring a pulse detection bitmap from an imaging sensor array into a digital read out integrated circuit (DROIC), filtering the pulse detection bitmap within the DROIC to convert the pulse detection bitmap into a filtered pulse detection bitmap, and determining for a given pixel in the filtered pulse detection bitmap whether the pixel has a value that exceeds a threshold, indicating a true laser pulse return has been detected in the pixel.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: April 23, 2019
    Assignee: Sensors Unlimited, Inc.
    Inventors: John Liobe, Joshua Lund
  • Patent number: 10263382
    Abstract: A device comprising a master clock configured to produce a pulse sequence having a wideband light signal of approximately 800 nanometers or red visible wavelength of a predetermined amplitude. The device comprises X laser amplifiers along a common optical path each amplifier being triggered by a burst of X pulses with high-peak power and high-average power. The X laser amplifiers receive the pulse sequence of the master clock and sequentially amplifying the pulse sequence wherein a last laser amplifier of the X laser amplifiers produces an amplified pulse sequence. A compressor is configured to compress the amplified pulse sequence to produce a laser signal having a sequence of directed energy (DE) pulses each DE pulse having a pulse width in a femtosecond range to induce when striking a solid surface of a target object transient electric fields in a microwave frequency range. A system and method are also provided.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: April 16, 2019
    Assignee: LOCKHEED MARTIN CORPORATION
    Inventors: Gary P. Perryman, James R. Wood
  • Patent number: 10241339
    Abstract: The present disclosure discloses a laser pulse delay system and a laser annealing system. The laser pulse delay system comprises: a beam splitter, a first reflective unit and a delay unit. The beam splitter is configured to split a laser beam emitted by a laser into a first beam and a second beam, such that the first beam is transmitted to the first reflective unit and the second beam is transmitted to the delay unit. The first reflective unit is configured to reflect the first beam it receives, such that the reflected first beam is transmitted to a component to be irradiated. The delay unit is configured to delay the second beam it receives, such that the delayed second beam is transmitted to the component to be irradiated.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: March 26, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Xiaowei Xu, Xiaolong Li, Liangjian Li
  • Patent number: 10208902
    Abstract: A light source assembly includes a housing assembly and at least two sets of disparate light sources that are coupled to the housing assembly. The sets of disparate light sources include a first plurality of disparate light sources; and a second plurality of disparate light sources. Each plurality of disparate light sources includes a first light source that generates a first light beam having a first center wavelength and a second light source that generates a second light beam having a second center wavelength that is different than the first center wavelength. The first plurality of disparate light sources generates a first output beam that is directed along a first central beam axis. The second plurality of disparate light sources generates a second output beam that is directed along a second central beam axis that is spaced apart from the first central beam axis by at least approximately sixty degrees.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: February 19, 2019
    Assignee: DAYLIGHT SOLUTIONS, INC.
    Inventors: Alexander Jason Whitmore, Ronald Kevin Arp, Kristen Diane Cecchetti, Michael Vernon Henson, Eric Kim, J. Allen Priest, Michael Pushkarsky
  • Patent number: 10201387
    Abstract: The present disclosure relates generally to the use of medical devices for the treatment of vascular conditions. In particular, the present disclosure provides devices and methods for using laser-induced pressure waves to disrupt vascular blockages. The present disclosure not only provides devices and methods for using laser-induced pressure waves to disrupt vascular blockages, but the present disclosure also provides devices and method for assisting the guidewire in penetrating an occlusion, devices and method for using a sealable valve in the tip of the balloon catheter to reduce the overall size and diameter of the balloon catheter, thereby allowing the balloon catheter to penetrate smaller size blood vessels and devices and method that use stationary light absorbing material in lieu of and/or in combination of using liquid medium that flows into a balloon for a balloon catheter.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: February 12, 2019
    Assignee: THE SPECTRANETICS CORPORATION
    Inventors: Kenneth P. Grace, Thomas Triffo, James Cezo
  • Patent number: 10128972
    Abstract: According to the present disclosure, a controlling unit arbitrarily determines a current set temperature of a temperature setting unit to cause a light generating unit connected to the temperature setting unit to generate an optical signal having a wavelength according to the current set temperature, thereby making it possible to effectively reduce a wavelength overlap phenomenon that may occur when a plurality of R-ONUs in a passive optical network simultaneously transmit the optical signals.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: November 13, 2018
    Assignee: Lightron Fiber-Optic Devices Inc.
    Inventors: Soo Yuk, Taek Hyung Kim, Young-Un Heo, Sung Jin Park
  • Patent number: 10122143
    Abstract: Disclosed is a pulsed laser system. The pulsed laser system comprises a laser oscillator, a first optical amplifier on a rear end of the laser oscillator, a first optical adjustor on a rear end of the first optical amplifier, and a second optical adjustor on a rear end of the first optical adjustor. The first optical adjustor comprises a saturable absorber, an adjusting compressor on a rear end of the saturable absorber, and a first plasma mirror on a rear end of the adjusting compressor.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: November 6, 2018
    Assignee: ELECTRONICS & TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Dong Hoon Song, Moon Youn Jung
  • Patent number: 10104756
    Abstract: The system and method for creating plasma flares in air by using an ultra-short pulse laser (USPL) that generates plasma filaments with a short lifetime (in nanoseconds), and by heating these plasma filaments with intense microwave (RF) radiation to induce robust air breakdown, resulting in long lifetime (up to milliseconds) plasma flares in the atmosphere.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: October 16, 2018
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Chia-Lie Chang, Peter A. Budni
  • Patent number: 10084540
    Abstract: A visible light communication device includes: a light emitting device that emits visible light when current flows thereto; a power supply circuit that supplies the current that flows to the light emitting device; a switch that switches between ON and OFF states in which current does and does not flow to the light emitting device, respectively; a switch controller that controls the switch state; a voltage detector that detects an input voltage of the light emitting device; a threshold storage that stores information stipulating a threshold voltage; and a determiner that, when the switch is in the ON state and the voltage detector detects an ON voltage, determines whether the ON voltage satisfies a predetermined relationship with the threshold voltage stipulated by the information stored in the threshold storage. The switch controller further latches the switch in the OFF state when the determination by the determiner is affirmative.
    Type: Grant
    Filed: February 10, 2018
    Date of Patent: September 25, 2018
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Shojiro Kido, Shigeaki Yamasaki
  • Patent number: 10003168
    Abstract: In one embodiment, a laser system includes a seed laser diode configured to produce a free-space seed-laser beam and a seed-laser lens configured to collimate the seed-laser beam. The laser system also includes a pump laser diode configured to produce a free-space pump-laser beam and a pump-laser lens configured to collimate the pump-laser beam. The laser system further includes an optical-beam combiner configured to combine the collimated seed-laser and pump-laser beams into a combined free-space beam and a focusing lens configured to focus the combined beam. The laser system also includes an optical gain fiber that includes an input end configured to receive the focused beam. The laser system also includes a mounting platform, where one or more of the seed laser, the seed-laser lens, the pump laser, the pump-laser lens, the combiner, the focusing lens, and the input end of the gain fiber are mechanically attached to the platform.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: June 19, 2018
    Assignee: LUMINAR TECHNOLOGIES, INC.
    Inventor: Alain Villeneuve
  • Patent number: 9985415
    Abstract: Light with a short pulse width is emitted using a simple structure. A light source 101, a differentiation circuit 102, and a switch 103 are connected in series. When the switch 103 is switched on, inrush current flows in a capacitor 102b forming the differentiation circuit 102, and accordingly the light source 101 is supplied with electric current and thereby emits light. When the capacitor 102b is charged, electric current flows in a resistor 102a, and voltage drops at the resistor 102a. Then, the voltage applied to the light source 101 is decreased, whereby the light source 101 stops emitting light. By using the inrush current at the capacitor 102b, light with a short pulse width can be generated.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: May 29, 2018
    Assignee: KABUSHIKI KAISHA TOPCON
    Inventors: Yoshikatsu Tokuda, Yoshiaki Goto
  • Patent number: 9972969
    Abstract: A device includes a u-channel shaped member and a printed circuit board including a plurality of capacitors. Each of the plurality of capacitors has a mounting surface mounted to the printed circuit board and an opposing heat transfer surface thermally coupled to the u-channel shaped member. The device also includes an output cable coupled to the printed circuit board and a return cable coupled to the printed circuit board. The device further includes a control transistor disposed inside the u-channel shaped member and a current sensing resistor disposed inside the u-channel shaped member.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: May 15, 2018
    Assignee: Lawrence Livermore National Security, LLC
    Inventors: Edward Fulkerson, Rodney K. Lanning, Steven Telford
  • Patent number: 9966732
    Abstract: An optical amplifier is described. The optical amplifier (1) comprises a semiconductor disk gain medium (2) including at least one quantum well layer (9) and a pump field source (17) for generating an optical pump field (3) for the semiconductor disk gain medium. The optical amplifier acts to generate an output optical field (5) from an input optical field (4) received by the optical amplifier and arranged to be incident upon the semiconductor disk gain medium. Employing a semiconductor disk gain medium within the optical amplifier allows it to be optically pumped and thus provided for increased stability and beam quality of the output optical field while allowing for the design of optical amplifiers which can operate across a broad range of wavelengths. The optical amplifier may be employed with continuous wave or pulsed input optical fields.
    Type: Grant
    Filed: April 28, 2015
    Date of Patent: May 8, 2018
    Assignee: SOLUS TECHNOLOGIES LIMITED
    Inventors: Craig James Hamilton, Graeme Peter Alexander Malcolm
  • Patent number: 9939381
    Abstract: The invention relates to multi-photon excitation microscopy, and in particular to a path planning module and calibration module for three mirror adaptive sampling system configured to automatically generate an optimized RGG mirror scanning path by scanning a Field of View, identifying multiple region of interest targets, and analyzing the targets to generate an optimized path. The invention also relates to methods for maintaining a high frame rate during wide field of view sampling.
    Type: Grant
    Filed: April 7, 2017
    Date of Patent: April 10, 2018
    Assignee: VIDRIO TECHNOLOGIES, LLC
    Inventors: Bruce Kimmel, Jonathan King, Nathan Clack, Georg Jaindl
  • Patent number: 9941657
    Abstract: A passively mode-locking laser and corresponding method is described. The laser comprises a resonator (2) terminated by first (3) and second (4) mirrors and folded by a third (5) and fourth (6) mirror. The third mirror comprises a reflector (14) surmounted by a multilayer semiconductor gain medium (15) including at least one quantum well layer while the second mirror (4) comprises an intensity saturable mirror. The resonator is configured to provide a cross sectional area of an intra cavity resonating field on the intensity saturable mirror that is greater than or equal to a cross sectional area of the intra cavity resonating field on the multilayer semiconductor gain medium. This arrangement provides a passively mode-locking laser that exhibits increased stability when compared to those systems known in the art.
    Type: Grant
    Filed: April 20, 2015
    Date of Patent: April 10, 2018
    Assignee: SOLUS TECHNOLOGIES LIMITED
    Inventors: Craig James Hamilton, Graeme Peter Alexander Malcolm
  • Patent number: 9941120
    Abstract: The inventive system for crystallizing an amorphous silicon (a-Si) film is configured with a quasi-continuous wave fiber laser source operative to emit a film irradiating pulsed beam. The fiber laser source is operative to emit a plurality of non-repetitive pulses incident on the a-Si. In particular, the fiber laser is operative to emit multiple discrete packets of film irradiating light at a burst repetition rate (BRR), and a plurality of pulses within each packet emitted at a pulse repetition rate (PRR) which is higher than the BRR. The pulse energy, pulse duration of each pulse and the PRR are controlled so that each packet has a desired packet temporal power profile (W/cm2) and packet energy sufficient to provide transformation of a-Si to polysilicon (p-Si) at each location of the film which is exposed to at least one packets.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: April 10, 2018
    Assignee: IPG PHOTONICS CORPORATION
    Inventors: Alexey Avdokhin, Yuri Erokhin, Manuel Leonardo, Alexander Limanov, Igor Samartsev, Michael von Dadelszen
  • Patent number: 9917416
    Abstract: A semiconductor laser oscillator includes a diode unit configured from a plurality of banks, in which one bank is configured from a plurality of laser diodes connected in series. The diode unit includes a wavelength locking mechanism for locking to a plurality of wavelengths. The semiconductor laser oscillator includes a controller configured to control input currents to the laser diodes of each of the plurality of banks individually in correspondence to a characteristic of a wavelength locking efficiency, and to control an output of the diode unit as a whole to a required output.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: March 13, 2018
    Assignees: AMADA HOLDINGS CO., LTD., LUMENTUM OPERATIONS LLC
    Inventors: Kaori Usuda, Minoru Ogata
  • Patent number: 9887511
    Abstract: Provided is a passive Q-switch laser device possessing a power density controller (15) making power density of excitation light from an excitation light source (14) equal to or greater than power density so that delay time required for reaching oscillation after start of excitation of a laser gain medium (12) becomes equal to or shorter than a laser upper energy level lifetime of the laser gain medium (12).
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: February 6, 2018
    Assignee: INTER-UNIVERSITY RESEARCH INSTITUTE CORPORATION NATIONAL INSTITUTE OF NATURAL SCIENCES
    Inventors: Takunori Taira, Arvydas Kausas, Lihe Zheng
  • Patent number: 9865994
    Abstract: A VCSEL array includes a base substrate, a plurality of VCSEL devices and an inter-device line. Each of the plurality of VCSEL devices is disposed on a front side of the base substrate. The inter-device line connects two of the plurality of VCSEL devices that are adjacent to each other, the two VCSEL devices being connected in series such that forward directions of the two VCSEL devices are the same. An insulating groove that electrically insulates the two VCSEL devices is formed on the base substrate.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: January 9, 2018
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Ippei Matsubara, Takayuki Kona, Keiji Iwata
  • Patent number: 9846313
    Abstract: According to exemplary embodiments of the present disclosure, it is possible to provide method, system, arrangement, computer-accessible medium and device to stimulate individual neurons in brain slices in any arbitrary spatio-temporal pattern, using two-photon uncaging of photo-sensitive compounds such as MNI-glutamate and/or RuBi-Glutamate with beam multiplexing. Such exemplary method and device can have single-cell and three-dimensional precision. For example, by sequentially stimulating up to a thousand potential presynaptic neurons, it is possible to generate detailed functional maps of inputs to a cell. In addition, it is possible to combine this exemplary approach with two-photon calcium imaging in an all-optical method to image and manipulate circuit activity. Further exemplary embodiments of the present disclosure can include a light-weight, compact portable device providing for uses in a wide variety of applications.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: December 19, 2017
    Assignee: THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK
    Inventors: Volodymyr Nikolenko, Rafael Yuste, Brendon O. Watson, Darcy Peterka
  • Patent number: 9780526
    Abstract: A semiconductor-laser-device assembly includes a mode-locked semiconductor-laser-element assembly including a mode-locked semiconductor laser element, and a dispersion compensation optical system, on which laser light emitted from the mode-locked semiconductor laser element is incident and from which the laser light is emitted; and a semiconductor optical amplifier having a layered structure body including a group III-V nitride-based semiconductor layer, the semiconductor optical amplifier configured to amplify the laser light emitted from the mode-locked semiconductor-laser-element assembly.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: October 3, 2017
    Assignee: Sony Corporation
    Inventors: Shunsuke Kono, Masaru Kuramoto, Rintaro Koda
  • Patent number: 9777053
    Abstract: Arrangements and methods are provided for obtaining information associated with an anatomical sample. For example, at least one first electro-magnetic radiation can be provided to the anatomical sample so as to generate at least one acoustic wave in the anatomical sample. At least one second electro-magnetic radiation can be produced based on the acoustic wave. At least one portion of at least one second electro-magnetic radiation can be provided so as to determine information associated with at least one portion of the anatomical sample. In addition, the information based on data associated with the second electro-magnetic radiation can be analyzed. The first electro-magnetic radiation may include at least one first magnitude and at least one first frequency. The second electro-magnetic radiation can include at least one second magnitude and at least one second frequency.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: October 3, 2017
    Assignee: The General Hospital Corporation
    Inventor: Seok-Hyun Yun
  • Patent number: 9768577
    Abstract: A pulse multiplier includes a beam splitter and one or more mirrors. The beam splitter receives a series of input laser pulses and directs part of the energy of each pulse into a ring cavity. After circulating around the ring cavity, part of the pulse energy leaves the ring cavity through the beam splitter and part of the energy is recirculated. By selecting the ring cavity optical path length, the repetition rate of an output series of laser pulses can be made to be a multiple of the input repetition rate. The relative energies of the output pulses can be controlled by choosing the transmission and reflection coefficients of the beam splitter. This pulse multiplier can inexpensively reduce the peak power per pulse while increasing the number of pulses per second with minimal total power loss.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: September 19, 2017
    Assignee: KLA-Tencor Corporation
    Inventors: Yung-Ho Alex Chuang, Justin Dianhuan Liou, J. Joseph Armstrong, Yujun Deng
  • Patent number: 9685754
    Abstract: A device for generating temporally distant light pulses is provided, the device including at least a first light source for generating a first sequence of light pulses at a first repetition rate, and a second light source for generating a second sequence of light pulses at a second repetition rate. In some embodiments the device includes at least one actuator element which influences the first and/or the second repetition rate, and a control element which charges the actuator element with a periodical modulation signal for periodical variation of the first and/or second repetition rate. A control circuit is also provided including at least a phase detector, a corrective element, a control element, and a superposition element that forms an actuator signal from a modulation signal and an output signal of the control element, and which charges the actuator element with the actuator signal.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: June 20, 2017
    Assignee: TOPTICA PHOTONICS AG
    Inventors: Thomas A. Puppe, Nico Vieweg, Armin Zach, Alexander Sell
  • Patent number: 9664856
    Abstract: A light divider includes a light guide having a first surface and a second surface that reflect light incident on the light guide, the light guide causing the light to propagate through a portion between the first surface and the second surface, light dividing films that are provided in the light guide and so characterized that the light dividing films not only reflect but also transmit the light, and a plurality of light extracting portions that are provided on the first surface and allow light fluxes that the light dividing films have transmitted to exit through the first surface.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: May 30, 2017
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Kimio Nagasaka
  • Patent number: 9647415
    Abstract: A laser apparatus according to embodiment may include: a laser chamber filled with a laser gain medium; a pair of electrodes disposed in the laser chamber; a charger configured to apply a charge voltage for causing a discharge to occur between the pair of the electrodes; a pulse power module configured to covert the charge voltage applied by the charger into a short pulsed voltage, and apply the short pulsed voltage between the pair of the electrodes; and a controller configured to calculate input energies Ein applied to the pair of the electrodes based on the charge voltage, calculate an integration value Einsum of the input energies Ein by integrating the calculated input energies Ein, and determine whether the integration value Einsum exceeds an integration lifetime value Einsumlife of input energy or not.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: May 9, 2017
    Assignee: Gigaphoton Inc.
    Inventors: Hiroaki Tsushima, Osamu Wakabayashi, Takashi Matsunaga
  • Patent number: 9642233
    Abstract: A method and apparatus for generating a pulsed jet of fluid, and transforming the jet into a plasma. The method includes using a high-pressure rapid solenoid valve, and a pipe mounted on an outlet opening of the solenoid valve to produce a pulsed fluid jet which is sub-millimetric in size, and the atomic density of which is more than 1020 cm?3.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: May 2, 2017
    Assignee: ECOLE POLYTECHNIQUE
    Inventors: Soriba Franciszek (François) Sylla, Victor Armand Malka, Alessandro Federico Flacco, Mina Ivanova Veltcheva, Subhendu Kahaly
  • Patent number: 9617368
    Abstract: A method for polymerizing monomer units and/or oligomer units is disclosed. Said method is characterized in that the energy required for polymerization is introduced into the monomer units and/or oligomer units to be polymerized by means of infrared light pulses, wherein the infrared light pulses have a wavelength of 2500 to 20000 nm, an intensity of more than 1014 W/m2, a duration of more than 8 fs and less than 3 ps and a substantially linear polarization.
    Type: Grant
    Filed: June 6, 2012
    Date of Patent: April 11, 2017
    Assignee: FREIE UNIVERSITÄT BERLIN
    Inventors: Karsten Heyne, Anja Heyne
  • Patent number: 9590386
    Abstract: The invention describes classes of robust fiber laser systems usable as pulse sources for Nd: or Yb: based regenerative amplifiers intended for industrial settings. The invention modifies adapts and incorporates several recent advances in FCPA systems to use as the input source for this new class of regenerative amplifier.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: March 7, 2017
    Assignee: IMRA AMERICA, INC.
    Inventors: Donald J. Harter, Gyu C. Cho, Zhenlin Liu, Martin E. Fermann, Xinhua Gu, Salvatore F. Nati, Lawrence Shah, Ingmar Hartl, Mark Bendett
  • Patent number: 9535417
    Abstract: A processing information acquisition system in a processing machine which feeds a processing point energy or material, the processing information acquisition system provided with a position information acquisition unit which acquires position information of a feed unit of energy or material, a feed rate control unit which receives a feed condition command of energy or material, converts the feed condition command to a control command which controls a feed of energy or material, and uses the converted control command to control a feed rate of energy or material from the feed unit, a feed rate estimation unit which acquires the control command from the feed rate control unit and calculates an estimated feed rate of energy or material which is fed to a processing point based on the control command, and an output unit which outputs the position information which the position information acquisition unit acquired and the estimated feed rate which the feed rate estimation unit calculated when the feed unit is locat
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: January 3, 2017
    Assignee: FANUC Corporation
    Inventors: Atsushi Mori, Akinori Ohyama, Junichi Tezuka
  • Patent number: 9531151
    Abstract: Method for generating a series of laser pulses with a laser assembly, the laser assembly at least having two reflecting members, a laser medium and an electro-optical modulator are disclosed. The laser assembly operates in a light amplifying mode and runs a pulse extraction sequence. The pulse extraction sequence is run by applying a defined voltage change with reference to the amplification voltage, wherein changing of the voltage is adjusted such that at least one intermediate switching state is generated on side of the electro-optical modulator, the intermediate switching state providing a particular change of polarization of the amplified laser radiation by the electro-optical modulator, such that a final switching state is generated on side of the electro-optical modulator by applying a final extraction voltage at the end of the time period.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: December 27, 2016
    Assignee: HIGH Q LASER GMBH
    Inventors: Dominik Fuchs, Michael Schmidt, Hubert Adamietz, Juerg Aus Der Au
  • Patent number: 9525265
    Abstract: A repetition rate (pulse) multiplier includes one or more beam splitters and prisms forming one or more ring cavities with different optical path lengths that delay parts of the energy of each pulse. A series of input laser pulses circulate in the ring cavities and part of the energy of each pulse leaves the system after traversing the shorter cavity path, while another part of the energy leaves the system after traversing the longer cavity path, and/or a combination of both cavity paths. By proper choice of the ring cavity optical path length, the repetition rate of an output series of laser pulses can be made to be a multiple of the input repetition rate. The relative energies of the output pulses can be controlled by choosing the transmission and reflection coefficients of the beam splitters. Some embodiments generate a time-averaged output beam profile that is substantially flat in one dimension.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: December 20, 2016
    Assignee: KLA-Tencor Corporation
    Inventors: Yung-Ho Alex Chuang, Xiaoxu Lu, Justin Dianhuan Liou, J. Joseph Armstrong, Yujun Deng, John Fielden
  • Patent number: 9419407
    Abstract: A pulsed UV laser assembly includes a partial reflector or beam splitter that divides each fundamental pulse into two sub-pulses and directs one sub-pulse to one end of a Bragg grating and the other pulse to the other end of the Bragg grating (or another Bragg grating) such that both sub-pulses are stretched and receive opposing (positive and negative) frequency chirps. The two stretched sub-pulses are combined to generate sum frequency light having a narrower bandwidth than could be obtained by second-harmonic generation directly from the fundamental. UV wavelengths may be generated directly from the sum frequency light or from a harmonic conversion scheme incorporating the sum frequency light. The UV laser may further incorporate other bandwidth reducing schemes. The pulsed UV laser may be used in an inspection or metrology system.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: August 16, 2016
    Assignee: KLA-Tencor Corporation
    Inventors: Yujun Deng, J. Joseph Armstrong, Yung-Ho Alex Chuang, Vladimir Dribinski, John Fielden
  • Patent number: 9418822
    Abstract: A plasma processing apparatus includes a plasma generating device configured to generate a plasma within a processing vessel by using a high frequency wave generated by a microwave generator 41 including a magnetron 42 configured to generate the high frequency wave; detectors 54a and 54b configured to measure a power of a traveling wave that propagates to a load side and a power of a reflected wave reflected from the load side, respectively; and a voltage control circuit 53a configured to control a voltage supplied to the magnetron 42 by a power supply 43. Further, the voltage control circuit 53a includes a load control device configured to supply, to the magnetron 42, a voltage corresponding to a power calculated by adding a power calculated based on the power of the reflected wave measured by the detector 54b to the power of the traveling wave measured by the detector 54a.
    Type: Grant
    Filed: February 11, 2014
    Date of Patent: August 16, 2016
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Kazushi Kaneko, Naoki Matsumoto, Koji Koyama, Kazunori Funazaki, Hideo Kato, Kiyotaka Ishibashi
  • Patent number: 9404800
    Abstract: Systems and methods for non-invasive optical imaging are provided. One or more time-lenses can be utilized to perform an optical Fourier transform, and the time-to-wavelength conversion can generate a wavelength-encoded image of optical scattering, analogous to optical coherence tomography. This optical Fourier transform provides improved axial resolution and simplifies digital signal processing after data acquisition.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: August 2, 2016
    Assignee: THE UNIVERSITY OF HONG KONG
    Inventors: Kenneth Kin Yip Wong, Chi Zhang
  • Patent number: 9397463
    Abstract: The present invention relates to a method and a device for the simultaneous compression and characterization of ultrashort laser pulses. An embodiment of the method comprises applying predetermined spectral phases to the pulse to be characterized so as to perform a dispersion scan; applying a nonlinear process to the pulse to be characterized; measuring the resulting signal from the application of the predetermined spectral phases and nonlinear process; applying a numerical iterative algorithm to the measured signal to retrieve the spectral phase of the pulse to be characterized. A few cycle laser pulse may be negatively chirped with a pair of DCM, the controllable amount of positive dispersion may be provided by a pair of glass wedges, one of them being translated for dispersion or phase control, and the frequency spectrum may be measured as well as also frequency resolved the dispersion dependent second-harmonic of the signal being phase modulated.
    Type: Grant
    Filed: October 11, 2012
    Date of Patent: July 19, 2016
    Assignee: UNIVERSIDADE DO PORTO
    Inventors: Miguel Nicolau Da Costa Ribeiro De Miranda, Helder Manuel Paiva Rebelo Cerejo Crespo, Thomas Peter Andreas Fordell, Cord Louis Arnold, Anne L'Huillier
  • Patent number: 9362707
    Abstract: A fiber-based supercontinuum system including: a pump laser; a ZBLAN or other fluoride-based microstructured glass fiber; and control electronics; wherein the control electronics control the pump laser to generate laser pulses into the ZBLAN or other fluoride-based microstructured glass fiber. The fabrication of a ZBLAN photonic crystal fiber with sub-micron features and large air-filling fraction and the use of the fiber to generate a stable supercontinuum (200 to 2500 nm) from 140 fs, 1 nJ pulses at 1042 nm are disclosed.
    Type: Grant
    Filed: October 29, 2014
    Date of Patent: June 7, 2016
    Assignee: Max-Planek-Gesellschaft Zur Foderung der Wissenschaften EV.
    Inventors: Xin Jiang, Fehim Babic, Nicolas Y. Joly, Philip St. J. Russell
  • Patent number: 9337608
    Abstract: A laser source capable of emitting energy pulses greater than or equal to 100 TeraWatt, consisting of a laser chain that comprises in cascade: a solid-state laser oscillator; a first amplification stage with frequency chirping; and a last amplification stage with frequency chirping; a first filter with one or two non-linear crystals and third order non-linear optical susceptibility, capable of generating a cross-polarized wave, known as non-linear cross-polarization filter, inserted between these two amplification stages. The laser chain furthermore comprises: between the first and the last amplification stage, at least one other non-linear cross-polarization filter, i.e. N filters in the chain with N?2; and N?1 dispersion compensator(s), placed at the output of the first filter(s) (respectively).
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: May 10, 2016
    Assignee: Thales
    Inventor: Christophe Simon-Boisson
  • Patent number: 9252561
    Abstract: A frequency comb laser providing large comb spacing is disclosed. At least one embodiment includes a mode locked waveguide laser system. The mode locked waveguide laser includes a laser cavity having a waveguide, and a dispersion control unit (DCU) in the cavity. The DCU imparts an angular dispersion, group-velocity dispersion (GVD) and a spatial chirp to a beam propagating in the cavity. The DCU is capable of producing net GVD in a range from a positive value to a negative value. In some embodiments a tunable fiber frequency comb system configured as an optical frequency synthesizer is provided. In at least one embodiment a low phase noise micro-wave source may be implemented with a fiber comb laser having a comb spacing greater than about 1 GHz. The laser system is suitable for mass-producible fiber comb sources with large comb spacing and low noise. Applications include high-resolution spectroscopy.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: February 2, 2016
    Assignee: IMRA AMERICA, INC.
    Inventors: Martin Fermann, Ingmar Hartl
  • Patent number: 9252795
    Abstract: A system for distributing a reference oscillator signal includes a clock having a reference oscillator and a femtosecond laser stabilized by the reference oscillator. The system also includes at least one beamsplitter configured to split the femtosecond laser. The system further includes one or more remote nodes that are spaced from the clock. The remote nodes are configured to generate reference signals based on the split femtosecond laser.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: February 2, 2016
    Assignee: Raytheon Company
    Inventors: Steven R. Wilkinson, Matthew T. Cashen, Todd O. Clatterbuck
  • Patent number: 9246304
    Abstract: There is provided a pulse shaping device including a pulse generator configured to generate pulsed light by using a semiconductor laser for emitting light of a predetermined wavelength, and an optical member provided in a subsequent stage of the pulse generator and configured to compress a pulse time width of the pulsed light. The pulsed light has a first frequency dispersion state. The optical member imparts a second frequency dispersion state to the pulsed light, the second frequency dispersion state being a frequency dispersion state opposite to the first frequency dispersion state.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: January 26, 2016
    Assignee: SONY CORPORATION
    Inventors: Kenji Tanaka, Michio Oka
  • Patent number: 9235104
    Abstract: The present invention provides a tunable optical frequency converter based on an amplitude modulator, which comprises a laser, a first optical isolator, a circulating frequency conversion module. Said circulating frequency conversion module is composed of an optical coupler, an amplitude modulator, an optical amplifier, a second optical isolator, a first optical circulator, an optical fiber Bragg grating, a second optical circulator, a tunable filter and a tunable attenuator. Light outputted by said laser is inputted to said circulating frequency conversion module to conduct frequency converting repeatedly after passing through the first optical isolator, and then separated by a tunable filter and a second optical circulator, then the frequency converted light is outputted from the port of the circulating frequency conversion module.
    Type: Grant
    Filed: October 24, 2012
    Date of Patent: January 12, 2016
    Assignee: SHENZHEN UNIVERSITY
    Inventors: Zhengbiao Ouyang, Chunchao Qi
  • Patent number: 9236707
    Abstract: A system and method generate laser pulses. Using the modulation signal from a pulse generation module, a seed laser diode generates seed light pulses in response to direct drive current modulation. The seed light pulses have a pulse duration longer than a target pulse duration and a spectral chirp. A compression module has dispersion characteristics over a broad spectral range. The pulse generation module is configured to adapt the modulation signal to tailor the spectral chirp of the seed light pulses in view of the dispersion characteristics of the compression module, such that propagation of the seed light pulses through the compression module compresses the seed pulses into output light pulses having the target pulse duration.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: January 12, 2016
    Assignee: Institut National D'Optique
    Inventor: Louis Desbiens
  • Patent number: 9229242
    Abstract: 3D display device, 3D display system and method for displaying 3D images are disclosed in the present invention. The 3D display device comprises: a display screen; a backlight means including a pulse light source; and a drive means used to receive video signals which are based on a standard video transmission protocol, so as to control the display screen to display 3D images according to the video signals, and control the pulse light source to emit a backlight pulse in the form of pulse during a vertical blank of each frame period of the video signals, wherein the duration of the backlight pulse is shorter than that of the vertical blank. The degrading of light is avoided in the 3D display device and the efficiency of the backlight can achieve almost 100%.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: January 5, 2016
    Assignee: NVIDIA Corporation
    Inventor: Shuang Xu
  • Patent number: 9209589
    Abstract: A laser system for semiconductor inspection includes a fiber-based fundamental light source for generating fundamental light that is then converted/mixed by a frequency conversion module to generate UV-DUV laser light. The fundamental light source includes a nonlinear chirp element (e.g., a Bragg grating or an electro-optic modulator) that adds a nonlinear chirp to the seed light laser system prior to amplification by the fiber amplifier(s) (e.g., doped fiber or Raman amplifiers). The nonlinear chirp includes an x2 or higher nonlinearity and is configured to compensates for the Self Phase Modulation (SPM) characteristics of the fiber-based amplifiers such that fundamental light is generated that has a spectral E95 bandwidth within five times that of the seed light. When multiple series-connected amplifiers are used, either a single nonlinear chirp element is provided before the amplifier string, or a chirp elements are included before each amplifier.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: December 8, 2015
    Assignee: KLA-Tencor Corporation
    Inventor: J. Joseph Armstrong
  • Patent number: 9184555
    Abstract: A laser system may include: a master oscillator configured to output pulsed laser light; an amplification device for amplifying the pulsed laser light from the master oscillator; a first timing detector configured to detect a first timing at which the master oscillator outputs the pulsed laser light; a second timing detector configured to detect a second timing at which the amplification device discharges; and a controller configured to, based on results of detection by the first timing detector and the second timing detector, control at least one of the first timing and the second timing so that the amplification device discharges when the pulsed laser light passes through a discharge space of the amplification device.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: November 10, 2015
    Assignee: Gigaphoton Inc.
    Inventors: Masaya Yoshino, Takashi Onose, Osamu Wakabayashi
  • Patent number: 9184560
    Abstract: A semiconductor-laser-device assembly includes a mode-locked semiconductor-laser-element assembly including a mode-locked semiconductor laser element, and a dispersion compensation optical system, on which laser light emitted from the mode-locked semiconductor laser element is incident and from which the laser light is emitted; and a semiconductor optical amplifier having a layered structure body including a group III-V nitride-based semiconductor layer, the semiconductor optical amplifier configured to amplify the laser light emitted from the mode-locked semiconductor-laser-element assembly.
    Type: Grant
    Filed: April 29, 2014
    Date of Patent: November 10, 2015
    Assignee: Sony Corporation
    Inventors: Shunsuke Kono, Masaru Kuramoto, Rintaro Koda