Control Of Pulse Characteristics Patents (Class 372/25)
  • Patent number: 11110294
    Abstract: A tissue treatment system includes an applicator connected with a base unit. The applicator includes a light source to generate light energy. A light guide directs the light energy to biological tissue and is configured to contact biological tissue. A thermoelectric cooler has a cold side and a hot side, with the cold side being associated with the light guide. A hot side plate is mounted to the hot side of the thermoelectric cooler. A first fluid passage is between the reservoir and the hot side plate to deliver cooling fluid over the hot side plate to chill the cold side of the thermoelectric cooler and cool the light guide and biological tissue. A second fluid passage is associated with the light source to direct cooling fluid to the light source prior to being returned to the reservoir. The first and second fluid passages define a single cooling fluid circulation loop.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: September 7, 2021
    Assignee: Candela Corporation
    Inventors: Kevin Schomacker, Dima Dubitsky
  • Patent number: 11079656
    Abstract: An ultrashort light pulse oscillated from an ultrashort pulse oscillator enters a waveguide (2) via a polarization control element (3). After conversion into a supercontinuum by a nonlinear optical effect, it is compressed by a prism pair compressor (71) as pulse compressor (7), and then emitted. The waveguide (2), which is a nonlinear fiber with normal dispersion in the wavelength range from 850 to 1550, generates the supercontinuum having a spectrum continuous in a wavelength band width of at least 200 nm included in the wavelength range from 850 to 1550 nm. The supercontinuum, which has a peak power within 1 to 100 kW, can be used as excitation light in a multiphoton excitation fluorescence microscope for fluorescence observation of biological samples.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: August 3, 2021
    Assignee: Ushio Denki Kabushiki Kaisha
    Inventors: Akira Ichihara, Akihiko Nakano, Aiko Sawada, Aya Ota
  • Patent number: 11040414
    Abstract: An additive manufacturing apparatus comprises a processing chamber defining a window for receiving a laser beam and an optical module. The optical module is removably-mountable to the processing chamber for delivering the laser beam through the window. The optical module contains optical components for focusing and steering the laser beam and a controlled atmosphere can be maintained within the module.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: June 22, 2021
    Assignee: RENISHAW PLC
    Inventors: Simon Peter Scott, Chris Sutcliffe
  • Patent number: 11044448
    Abstract: Spectral filtering or shaping is applied to an imaging system of an aerial vehicle such as a UAV to ensure that the measurements between a camera system and an ambient light sensor system are proportional under all light conditions. The spectral filtering is applied so that the resulting spectral sensitivity curves of the ambient light sensor system and of the camera system are proportional to one another over a spectral region. Thereafter, it is determined if there is a difference between a target ambient lighting condition and a real-time ambient lighting condition collected by the ambient light sensor system when an image was obtained. If a difference exists, a color correction can be applied to the image. This results in more accurate color correction and more spectrally accurate and consistent images.
    Type: Grant
    Filed: August 12, 2019
    Date of Patent: June 22, 2021
    Assignee: Sentera, Inc.
    Inventors: Ryan Nelson, Eric Taipale
  • Patent number: 11027371
    Abstract: A laser applying mechanism which has a laser oscillator adapted to oscillate a pulsed laser and to emit a linearly polarized pulsed laser beam. The laser applying mechanism includes: a polarization plane composing unit adapted to selectively synthesize a pulsed laser beam having a second polarization plane rotated by 90 degrees with respect to a pulsed laser beam having a first polarization plane which is emitted from the laser oscillator; an amplifier adapted to amplify a power of the pulsed laser beam composed by the polarization plane composing unit; and a pulsed laser beam extracting unit adapted to extract a pulsed laser beam having a polarization plane to be utilized, from among the pulsed laser beam having the first polarization plane and the pulsed laser beam having the second polarization plane which are contained in the pulsed laser beam amplified by the amplifier.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: June 8, 2021
    Assignee: DISCO CORPORATION
    Inventor: Keiji Nomaru
  • Patent number: 10989935
    Abstract: A modulation pattern calculation apparatus includes an iterative Fourier transform unit, a filtering process unit, and a modulation pattern calculation unit. The iterative Fourier transform unit performs a Fourier transform on a waveform function including an intensity spectrum function and a phase spectrum function, performs a replacement of a temporal intensity waveform function based on a desired waveform after the Fourier transform and then performs an inverse Fourier transform, and performs a replacement to constrain the phase spectrum function after the inverse Fourier transform. The filtering process unit performs a filtering process of cutting a part exceeding a cutoff intensity for each wavelength, on the intensity spectrum function in a frequency domain.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: April 27, 2021
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Koyo Watanabe, Takashi Inoue, Koji Takahashi
  • Patent number: 10923881
    Abstract: A monolithic integrated semiconductor random laser comprising substrate, lower confinement layer on the substrate, active layer on the lower confinement layer, upper confinement layer on the active layer, strip-shaped waveguide layer longitudinally made in middle of the upper confinement layer, P+ electrode layer divided into two segments and made on the waveguide layer and N+ electrode layer on a back face of the lower confinement layer, wherein the two segments correspond respectively to gain region and random feedback region. The random feedback region uses a doped waveguide to randomly feedback light emitted by the gain region and then generates random laser which is random in frequency and intensity. Further, the semiconductor laser is light, small, stable in performance and strong in integration.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: February 16, 2021
    Inventors: Mingjiang Zhang, Jianzhong Zhang, Tianshuang Lv, Lijun Qiao, Yi Liu, Tong Zhao, Anbang Wang, Yuncai Wang
  • Patent number: 10916461
    Abstract: This invention provides an effective and rapid method of laser processing for separating semiconductor devices formed on hard and solid substrates (6) with a one pass process. The method is based on generating fractures along the scribing trajectory which extend deep into the bulk of a workpiece (6), wherein thermal stress is induced by delivering at least two processing (ultra short pulse) pulsed-beams (7), containing at least primary and secondary pulses. Primary pulses are used to generate a heat accumulated zone, which allows for more efficient absorption of the secondary pulses, which generate a sufficient heat gradient to produce mechanical failures, necessary for mechanically separating the workpiece (6) into separate pieces.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: February 9, 2021
    Assignee: EVANA TECHNOLOGIES, UAB
    Inventors: Egidijus Vanagas, Dziugas Kimbaras, Laurynas Veselis
  • Patent number: 10886690
    Abstract: The present invention provides systems and methods for optical frequency comb generation with self-generated optical harmonics in mode-locked lasers for detecting the carrier envelope offset frequency. The mode-locked laser outputs an optical frequency comb and a harmonic output. The harmonic output provides an optical heterodyne resulting in a detectable beat note. A carrier envelope offset frequency detector detects the beat note and generates an optical frequency comb signal. The signal can be used to stabilize the optical frequency comb output.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: January 5, 2021
    Assignee: IPG PHOTONICS CORPORATION
    Inventor: Sergey Vasilyev
  • Patent number: 10876193
    Abstract: Methods for making a material superwicking and/or superwetting (superhydrophyllic) involving creating one or more indentations in the surface of the material that have a micro-rough surface of protrusions, cavities, spheres, rods, or other irregularly shaped features having heights and/or widths on the order of 0.5 to 100 microns and the micro-rough surface having a nano-rough surface of protrusions, cavities, spheres, rods, and other irregularly shaped features having heights and/or widths on the order of 1 to 500 nanometers. Superwicking and/or superwetting materials having micro-rough and nano-rough surface indentations, including metals, glass, enamel, polymers, semiconductors, and others.
    Type: Grant
    Filed: September 6, 2012
    Date of Patent: December 29, 2020
    Assignee: UNIVERSITY OF ROCHESTER
    Inventors: Chunlei Guo, Anatoliy Y. Vorobyev
  • Patent number: 10879663
    Abstract: A solid-state laser system includes: a first solid-state laser device configured to output a first pulse laser beam; a second solid-state laser device configured to output a second pulse laser beam; a first non-linear crystal disposed on a first optical path and configured to convert the first and second pulse laser beams into a third pulse laser beam and output the third pulse laser beam; and a second non-linear crystal disposed on a second optical path and configured to convert the second and third pulse laser beams into a fourth pulse laser beam and output the fourth pulse laser beam. The second pulse laser beam is incident on the second non-linear crystal at a first timing before the first non-linear crystal. Residual light of the second pulse laser beam is incident on the first non-linear crystal at a second timing later than the first timing.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: December 29, 2020
    Assignee: Gigaphoton Inc.
    Inventor: Takashi Onose
  • Patent number: 10864042
    Abstract: Methods and devices for an optical assembly for a laser generator comprise: a laser source producing a first beam of light and an optical assembly. The optical assembly comprises a prism. The prism has a bottom surface configured to receive a first beam at an incoming angle of incidence relative to a first surface normal, and a hypotenuse surface configured to transmit, at an exit angle relative to a second surface normal, a second beam having a second aspect ratio. The optical assembly further comprises a plano-convex lens configured to transmit the second beam to a coupler. The coupler comprises a first coupling plane at a first distance from the plano-convex lens and a second coupling plane at a second distance from the plano-convex lens. The combination of the prism and the plano-convex lens is configured to change the beam divergence, so that the first coupling plane has a third aspect ratio and the second coupling plane has a fourth aspect ratio.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: December 15, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Gabriel Block, Kenneth P. Grace
  • Patent number: 10842567
    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 occlusions. The present disclosure not only provides devices and methods for using laser-induced pressure waves to disrupt vascular occlusions or portions thereof, but the present disclosure also provides devices and methods for disrupting calcium in the media and/or intima layer of an arterial wall.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: November 24, 2020
    Assignee: THE SPECTRANETICS CORPORATION
    Inventors: Kenneth P. Grace, Thomas Triffo, James Cezo
  • Patent number: 10811834
    Abstract: A laser beam generation apparatus includes a light source section including a plurality of seed lasers each emitting laser light, an optical amplification section disposed to face the seed lasers of the light source section and configured to amplify the laser light emitted from the seed lasers and received at an incidence surface to output the amplified laser light from an emission surface, and a plurality of light-guiding paths configured to guide the laser light emitted by the seed lasers to enter the incidence surface of the optical amplification section, wherein at least one of the plurality of light-guiding paths has an optical distance different from optical distances of other light-guiding paths, wherein the optical amplification section is configured to combine the laser light from the plurality of light-guiding paths and output the combined laser light as a laser beam.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: October 20, 2020
    Assignee: RICOH COMPANY, LTD.
    Inventors: Shinsuke Shibata, Yasuhiro Higashi, Yoshio Wada
  • Patent number: 10755886
    Abstract: The present invention relates to a modulator system adapted to generate high voltage pulses suitable for supply across a high voltage load having a thermionic cathode, such as a magnetron. The modulator system comprises a high voltage DC PSU connected to a switching mechanism adapted to generate high voltage pulses from the high voltage DC PSU for application to a thermionic cathode of a high voltage load. The modulator system further comprises an isolation transformer; a heater PSU adapted to be connected to a cathode heater through the isolation transformer and to provide an AC current thereto.
    Type: Grant
    Filed: November 21, 2019
    Date of Patent: August 25, 2020
    Assignee: TELEDYNE UK LIMITED
    Inventor: Robert Richardson
  • Patent number: 10727642
    Abstract: Online calibration of laser performance as a function of the repetition rate at which the laser is operated is disclosed. The calibration can be periodic and carried out during a scheduled during a non-exposure period. Various criteria can be used to automatically select the repetition rates that result in reliable in-spec performance. The reliable values of repetition rates are then made available to the scanner as allowed values and the laser/scanner system is then permitted to use those allowed repetition rates.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: July 28, 2020
    Assignees: Cymer, LLC, ASML Netherlands B.V.
    Inventors: Joshua Jon Thornes, Tanuj Aggarwal, Kevin Michael O'Brien, Frank Everts, Herman Philip Godfried, Russell Allen Burdt
  • Patent number: 10722983
    Abstract: A method for manufacturing a semiconductor device includes the steps of: preparing a semiconductor substrate including a first semiconductor layer and a second semiconductor layer; and irradiating the semiconductor substrate with laser light from the first semiconductor layer side to divide the semiconductor substrate into individual semiconductor chips. The first semiconductor layer includes a semiconductor material transparent to the laser light. The second semiconductor layer includes a semiconductor material opaque to the laser light. In the step of irradiating with the laser light, laser light having intensity that makes the semiconductor material of the first semiconductor layer opaque to the laser light is irradiated.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: July 28, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Katsumi Ono, Kenji Hirano, Masato Negishi, Masato Suzuki, Tatsuro Yoshino
  • Patent number: 10574216
    Abstract: Method and apparatus to produce a step function with a designed transition (rise and/or fall) time on the order of <10 ns that reaches steady state by implementing a system that sums a number of currents at different rise times (frequencies) to generate the step function. The system also includes a passive output filter, composed of low resistance, inductance and very low capacitance to mitigate overshoot and high frequency noise.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: February 25, 2020
    Assignee: The University of North Carolina at Charlotte
    Inventor: Elisa Nicole Hurwitz
  • Patent number: 10574350
    Abstract: A method and apparatus estimating direct current bias of an optical modulator and a receiver. The method includes: performing signal processing to obtain a phase noise compensated signal, extracting a receiving signal component based on the phase noise compensated signal, removing the receiving signal component from the phase noise compensated signal, and calculating a received signal power based on the signal with the receiving signal component being removed. The method includes calculating a direct current bias of the optical modulator based on the receiving signal component, the received signal power and a drive signal power of the optical modulator.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: February 25, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Yangyang Fan, Liang Dou
  • Patent number: 10564043
    Abstract: The present invention relates to a apparatus and method for measuring a waveform of a light wave. A light wave measurement apparatus according to an embodiment of the present invention includes a pulse separation unit to separate an input light wave into a fundamental pulse and a signal pulse, a time delay adjustment unit to adjust a time delay between the fundamental pulse and the signal pulse, a focusing unit to focus the fundamental pulse and the signal pulse whose time delay is adjusted on an ionization material, and an ionization yield measurement unit to measure an ionization yield from electrons and/or ions generated by the focused fundamental pulse and signal pulse. The waveform of the input light wave is obtained by obtaining an ionization yield modulation changed by the signal pulse as a function of the time delay.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: February 18, 2020
    Assignees: Institute For Basic Science, Gwangju Institute of Science And Technology
    Inventors: Kyung-Taec Kim, Chang-Hee Nam, Seung-Beom Park, Wo-Sik Cho, Kyung-Seung Kim
  • Patent number: 10530516
    Abstract: The present disclosure includes methods and systems in which idle tones are added at an ingress and terminated at an egress of a given fiberoptic communication link between ROADM nodes. An equalization process can be performed across the spectrum of available wavelength channels and then a determination can be made of a number of channels that can be added or dropped at a given time that meet a maximum threshold for change in power of the channels in the available wavelength. As channels without information-carrying signals are filled with idle tones, the stability of the optical system can be improved as there is less variability in power change when all of the channels have a substantially similar nominal power and a signal on one or more of those channels are added or removed.
    Type: Grant
    Filed: March 20, 2018
    Date of Patent: January 7, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Zhiping Jiang
  • 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: 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: 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: 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: RE48398
    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: August 8, 2019
    Date of Patent: January 19, 2021
    Assignee: IPG PHOTONICS CORPORATION
    Inventors: Alexey Avdokhin, Yuri Erokhin, Manuel Leonardo, Alexander Limanov, Igor Samartsev, Michael von Dadelszen