Optical Frequency Converter Patents (Class 359/326)
  • Patent number: 10931085
    Abstract: A super structure grating spatially performs amplitude and phase modulation on a uniform grating using a modulation function to generate a comb reflection spectrum. (N+1) modulation function discrete values are obtained after discretization processing is performed on the modulation function using N thresholds. Each of the (N+1) modulation function discrete values corresponds to one section of optical waveguide whose refractive index is uniform or corresponds to one section of the uniform grating. A reflectivity and a full width half maximum (FWHM) of a reflection peak of the super structure grating is adjusted based on a relationship of a ratio of a length of an optical waveguide corresponding to at least one of the (N+1) modulation function discrete values to a total grating length of the super structure grating, and based on the total grating length of the super structure grating.
    Type: Grant
    Filed: October 17, 2019
    Date of Patent: February 23, 2021
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Lin Wu, Hongmin Chen
  • Patent number: 10908206
    Abstract: Disclosed herein are systems and methods for the characterization of transmission media, among other embodiments. For example, a system for characterizing a transmission medium may include: a waveform generator to generate an initial input waveform; waveform pre-processing circuitry to process the initial waveform to generate a processed input waveform for provision to the transmission medium, wherein the processed input waveform has a maximum amplitude greater than a maximum amplitude of the initial input waveform; and waveform output circuitry to display or store data representative of an initial output waveform, wherein the initial output waveform is output from the transmission medium as a reflection or transmission of the processed input waveform.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: February 2, 2021
    Assignee: Intel Corporation
    Inventors: Mayue Xie, Chengqing Hu, Jong-Ru Guo, Zuoguo Wu, Deepak Goyal
  • Patent number: 10901074
    Abstract: Methods and systems for providing eye-safe compatible receiver for a light detection and ranging system. The light detection and ranging system comprises; an emitting unit comprising a light source configured to emit a sequence of light pulses of a first wavelength into a three-dimensional environment; and a receiving module comprising a detector for detecting light pulses of a second wavelength, in which the second wavelength is shorter than the first wavelength, the receiving module further comprising a wavelength converter coupled to the detector and configured to convert an echo signal of the emitted light pulses into the light pulses of the second wavelength.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: January 26, 2021
    Assignee: HESAI TECHNOLOGY CO., LTD.
    Inventors: Zhengqing Pan, Shixiang Wu, Shaoqing Xiang, Kai Sun
  • Patent number: 10890824
    Abstract: A nonlinear crystal comprising a first curved face and an opposing second curved face is described. The first and second curved faces are arranged to provide the nonlinear crystal with rotational symmetry about at least one axis of the nonlinear crystal. The nonlinear crystal allows for frequency tuning of a generated optical field that is generated by propagating a fundamental optical field through the nonlinear crystal by rotation of the nonlinear crystal about an axis of rotation without any significant, or minimal, deviation being introduced to the generated optical field. These nonlinear crystals can therefore be incorporated into an external cavity frequency doubler or mixer without any need for the employment of optical compensation optics or servo control electronics to automatically realign the cavity mirrors.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: January 12, 2021
    Assignee: M Squared Lasers Limited
    Inventors: Gareth Thomas Maker, Graeme Peter Alexander Malcolm
  • Patent number: 10893342
    Abstract: There is provided a reconfigurable optical modulator comprising a light source and a splitter operative to receive an input signal from the light source and to split the input signal into a plurality of split signals. The optical modulator comprises a plurality of optical amplifiers, each being operative to receive one of the plurality of split signals as an input and to act as a switch having a first state where the split signal is blocked and a second state where the split signal is amplified. The optical modulator comprises a plurality of modulators, each being operative to receive an amplified split signal from one of the plurality of optical amplifiers and to modulate the amplified split signal into a modulated signal. The optical modulator comprises an optical combiner operative to combine a plurality of modulated signals produced by the plurality of modulators to thereby produce a modulated output signal.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: January 12, 2021
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Mehrdad Mir Shafiei, Robert Brunner, Stephane Lessard
  • Patent number: 10866486
    Abstract: An optical crystal for converting an input light beam, the crystal having an ingress surface, an egress surface, and a fan-out grating has a fan-out pattern oriented at an offset angle ? in the range of 1° to 45° with respect to a beam entry plane at a beam ingress location.
    Type: Grant
    Filed: August 2, 2019
    Date of Patent: December 15, 2020
    Assignee: QIOPTIQ PHOTONICS GMBH & CO. KG
    Inventors: Frank Mueller, Huw Major
  • Patent number: 10862014
    Abstract: In an aspect, an optical device includes a substrate, a light source mounted on a top surface of the substrate, and a lid attached to the top surface of the substrate, the lid defining a reflective cup positioned over the light source. In another aspect, an optical device includes a substrate, a light source disposed on the substrate, and a lid disposed on the substrate. The lid defines a reflective cup for concentrating and passing light from the light source. The optical device further includes a film formed on an inner sidewall of the reflective cup for reflecting the light from the light source. The film includes a primer layer, a reflecting layer and a protective layer.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: December 8, 2020
    Assignee: ADVANCED SEMICONDUCTOR ENGINEERING, INC.
    Inventors: Hsin-Ying Ho, Hsun-Wei Chan, Lu-Ming Lai, Shih-Chieh Tang
  • Patent number: 10852620
    Abstract: In example embodiments, a radiation source uses Rydberg states to generate coherent THz radiation (e.g., in the range of 1-20 THz). The radiation source includes a pair of pump lasers (e.g., external-cavity diode lasers (ECDLs)) optically coupled (e.g., by a dichroic mirror and optical fiber) to a heated vapor cell (e.g., a vacuum chamber) holding an atomic species (e.g., rubidium (Rb)). The pump lasers optically pump the atomic species (e.g., Rb) to a predetermined Rydberg state (e.g., the nD5/2 state), which creates a population inversion between that state (e.g., the nD5/2 state) and a lower lying Rydberg state (e.g., the (n+1)P3/2 state). The emission between these two strongly dipole coupled Rydberg states generates coherent THz radiation.
    Type: Grant
    Filed: May 7, 2019
    Date of Patent: December 1, 2020
    Assignee: National University of Singapore
    Inventors: Mun Choong Mark Lam, Sambit Bikas Pal, Wenhui Li, Christian Wolfgang Ernst Gross, Thibault Thomas Vogt
  • Patent number: 10824046
    Abstract: The present invention discloses a method for controlling spectral properties of optical quantum states using quantum interference in cascaded waveguide structure comprises the following steps: adopting a multi-stage cascaded waveguide structure sequentially consisting of a segment of nonlinear medium, a segment of dispersive medium, . . . and a segment of nonlinear medium, or adopting a two-stage cascaded waveguide structure sequentially consisting of a segment of nonlinear medium, a segment of dispersion-controllable dispersive medium and a segment of nonlinear medium; pumping the multi-stage cascaded waveguide structure or two-stage cascaded waveguide structure by using pulsed laser to generate optical quantum states through the cascaded parametric process in the cascaded waveguide structure. The spectral property of the optical quantum state can be flexibly adjusted by changing the number of stages, the length and dispersion property of the dispersive media.
    Type: Grant
    Filed: October 25, 2019
    Date of Patent: November 3, 2020
    Assignee: TIANJIN UNIVERSITY
    Inventors: Xiaoying Li, Liang Cui, Jie Su, Jiamin Li
  • Patent number: 10816906
    Abstract: Disclosed is a method of performing a measurement in an inspection apparatus, and an associated inspection apparatus and HHG source. The method comprises configuring one or more controllable characteristics of at least one driving laser pulse of a high harmonic generation radiation source to control the output emission spectrum of illumination radiation provided by the high harmonic generation radiation source; and illuminating a target structure with said illuminating radiation. The method may comprise configuring the driving laser pulse so that the output emission spectrum comprises a plurality of discrete harmonic peaks. Alternatively the method may comprise using a plurality of driving laser pulses of different wavelengths such that the output emission spectrum is substantially monochromatic.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: October 27, 2020
    Assignee: ASML Netherlands B.V.
    Inventors: Nan Lin, Arie Jeffrey Den Boef, Sander Bas Roobol, Simon Gijsbert Josephus Mathijssen, Niels Geypen
  • Patent number: 10809594
    Abstract: A visible-to-ultraviolet band optical frequency converter. The processing period of a nonlinear optical crystal is controlled to provide an additional period phase to meet a phase matching condition so as to realize effective optical frequency conversion. The additional period phase is characterized in that phase gratings periodically arranged according to different refractive indexes are formed in the crystal through technologies, including laser micro-processing, ion etching and the like, a nonlinear frequency conversion inverse process is avoided through the periodic structure damage of the crystals in the phase gratings and an additional period phase is provided, phase mismatch caused by the insufficient double refraction of the nonlinear optical crystal is avoided, and efficient frequency doubling or sum frequency output is realized.
    Type: Grant
    Filed: April 8, 2020
    Date of Patent: October 20, 2020
    Assignee: SHANDONG UNIVERSITY
    Inventors: Haohai Yu, Huaijin Zhang
  • Patent number: 10797462
    Abstract: Aspects of the present application are related to an Er-doped waveguide amplifier (EDWA) structure integrated in an uncooled silicon photonic transceiver and methods for fabricating the same. In some embodiments, the structure comprises three layers of waveguides: silicon, silicon nitride and Er-doped dielectric. The three layers of waveguides are integrated with an uncooled 980-nm pump laser. In some embodiments, the Er-doped dielectric waveguides are fully etched.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: October 6, 2020
    Assignee: Acacia Communications, Inc.
    Inventors: Christopher Doerr, Long Chen, Mohamadreza Banaee, Xingyu Zhang
  • Patent number: 10761344
    Abstract: A system includes a photophoretic display device including a trap light source and an illumination light source, an image converter including a light signal propagation director and a light signal sensor, and a control unit. The trap light source is configured to trap a scattering particle and the illumination light source is configured to illuminate the scattering particle that the trap light source is configured to trap such that the photophoretic display device generates a volumetric image. The light signal propagation director is configured to direct a visual signal of the volumetric image to the light signal sensor. The light signal sensor is configured to sense the visual signal and to generate a planar image signal based on the visual signal.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: September 1, 2020
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Paul Schmalenberg, Ercan M. Dede
  • Patent number: 10754224
    Abstract: A wavelength conversion device includes a light source configured to output an excitation light beam, a modulator configured to phase-modulate the excitation light beam, a polarization adjustor configured to adjust a polarization angle of the excitation light beam to 45 degrees or 135 degrees with respect to a polarization angle of a signal light beam, and a nonlinear medium configured to generate four-wave mixing of the excitation light beam whose polarization angle is adjusted and the signal light beam to generate an idler light beam having a frequency corresponding to a difference between frequencies of the signal light beam and the excitation light beam from the signal light beam.
    Type: Grant
    Filed: April 19, 2019
    Date of Patent: August 25, 2020
    Assignee: FUJITSU LIMITED
    Inventor: Tomoaki Takeyama
  • Patent number: 10725359
    Abstract: In order to accomplish highly-efficient nonlinear optical wavelength conversion for terahertz waves by using a simple configuration, an embodiment of the present invention provides a terahertz wave generating device 100 provided with a pump light source 104 that generates pump light LP of a single wavelength and a nonlinear optical element (periodical polarization inversion element) 102. The nonlinear optical element has a periodic structure in which the polarization or the crystal orientation is periodically inverted with a certain inversion period ?. When the pump light enters the nonlinear optical element, idler light LI and signal light LTHz are generated.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: July 28, 2020
    Assignee: RIKEN
    Inventors: Kouji Nawata, Yu Tokizane, Hiroaki Minamide
  • Patent number: 10720749
    Abstract: The invention relates to a method of generating frequency-tripled laser radiation (THG). It is the object of the invention to demonstrate an efficient approach to generating frequency-tripled laser radiation.
    Type: Grant
    Filed: April 23, 2019
    Date of Patent: July 21, 2020
    Assignee: TOPTICA Photonics AG
    Inventor: Matthias Scholz
  • Patent number: 10684420
    Abstract: A steerable optical transmit and receive terminal includes a MEMS-based N×1 optical switch network. Each optical switch in the optical switch network uses an electrostatic MEMS structure to selectively position a translatable optical grating close to or far from an optical waveguide. In the close (“ON”) position, light couples between the translatable optical grating and the optical waveguide, whereas in the far (“OFF”) position, no appreciable light couples between the translatable optical grating and the optical waveguide. The translatable optical grating is disposed at or near a surface of the optical switch network. Thus, the translatable optical grating emits light into, or receives light from, free space. The steerable optical transmit and receive terminal also includes a lens and can steer a free space optical beam in a direction determined by which port of the N×1 optical switch network is ON.
    Type: Grant
    Filed: October 9, 2019
    Date of Patent: June 16, 2020
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventors: Steven J. Spector, Michael G. Moebius, Benjamin F. Lane, Gregg E. Favalora
  • Patent number: 10656350
    Abstract: A coupling structure includes a single mode active device and a planar optical waveguide. Specifically, the planar optical waveguide includes a silica waveguide for transmitting an optical signal, where the silica waveguide includes a coupling section and a conduction section; the coupling section is of a regular trapezoidal structure or an inverted trapezoidal structure, where a surface of the coupling section coupled to the single mode active device is a trapezoid top, and a surface of the coupling section connected with the conduction section is a trapezoid bottom; and a coupling gap is preset between the single mode active device and the planar optical waveguide.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: May 19, 2020
    Assignee: Wuhan Telecommunication Devices Co., Ltd.
    Inventors: Ben Chen, Xuerui Liang, Baiquan Hu, Chenggang Liu, Di Zhang, Yongan Fu, Liping Sun, Weidong Ma, Xianghong Yu
  • Patent number: 10642127
    Abstract: An apparatus for generating visible light including a laser source emitting a fundamental beam, an optically nonlinear crystal, and a seed source emitting a seed beam. The optically nonlinear crystal receives the fundamental beam. The fundamental beam propagates in the nonlinear crystal at a first phase-matching angle for second-harmonic generation. A portion of the fundamental beam is converted into a second-harmonic beam that propagates in the nonlinear crystal at the first phase-matching angle for optical parametric generation. The seed source emits a seed beam having a wavelength longer than the second-harmonic beam. The seed beam is directed into the nonlinear crystal and propagates at a second phase-matching angle for the optical parametric amplification. A portion of the second-harmonic beam is converted into a signal beam at the seed wavelength and an idler beam by the optical parametric amplification.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: May 5, 2020
    Assignee: Coherent, Inc.
    Inventors: Dmitri Simanovski, Andrei Starodoumov, Norman Hodgson
  • Patent number: 10631393
    Abstract: A chamber device according to one aspect of the present disclosure includes a chamber inside which plasma is generated, a light source, and an incidence window configured to transmit light emitted from the light source to the inside of the chamber. The incidence window includes a first surface facing the outside of the chamber, and a second surface facing the inside of the chamber. At least the second surface is not coated with an anti-reflection film. The second surface is disposed in a state of being inclined at a non-perpendicular angle against an optical axis of the light emitted from the light source.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: April 21, 2020
    Assignee: Gigaphoton Inc.
    Inventor: Tsukasa Hori
  • Patent number: 10608775
    Abstract: An optical transmission apparatus includes a splitter configured to split a first wavelength division multiplexed optical signal arranged in a first wavelength band and a second wavelength division multiplexed optical signal arranged in a second wavelength band, respectively, from an optical signal including the first wavelength division multiplexed optical signal and the second wavelength division multiplexed optical signal, a wavelength converter configured to convert a wavelength of the split second wavelength division multiplexed optical signal to generate a third wavelength division multiplexed optical signal to be arranged in the first wavelength band, an optical monitor configured to monitor power of each wavelength channel of the third wavelength division multiplexed optical signal, and a transmitter configured to transmit a monitoring result by the optical monitor to a transmission source node of the optical signal or a relay node of the optical signal.
    Type: Grant
    Filed: April 22, 2019
    Date of Patent: March 31, 2020
    Assignee: FUJITSU LIMITED
    Inventors: Shinji Komiya, Norifumi Shukunami, Makoto Hasegawa, Tomohiro Yamauchi, Tomoyuki Kato
  • Patent number: 10554015
    Abstract: A method of making a quasi-phase-matching (QPM) structure comprising the steps of: applying a pattern to a substrate to define a plurality of growth regions and a plurality of voids; growing in a growth chamber a crystalline inorganic material on only the growth regions in the pattern, the crystalline inorganic material having a first polarity; applying an electric field within the growth chamber containing the patterned substrate with the crystalline inorganic material, wherein the electric field reaches throughout the growth chamber; and growing a crystalline organic material having a second polarity in the voids formed in the inorganic material under the influence of the electric field to influence the magnitude and the direction of the second polarity of the crystalline organic material, wherein the second polarity of the crystalline organic material is influenced to be different from the first polarity of the crystalline inorganic material in magnitude and/or direction.
    Type: Grant
    Filed: January 25, 2018
    Date of Patent: February 4, 2020
    Assignee: United States of America as represented by the Secretary of the Air Force
    Inventor: Vladimir Tassev
  • Patent number: 10527772
    Abstract: A display device includes a display panel; at least one light source package configured to emit light; and a light guide plate configured to receive the light emitted by the light source package and guide the light toward the display panel, wherein the at least one light source package includes: a light source configured to emit the light; a light converter disposed between the light source and the light guide plate, and configured to convert one or more properties of the light emitted by the light source; and a package housing in which the light source is disposed and including one side with an opening in which the light converter is disposed, the package housing including a unit support surface configured to support a side surface of the light converter.
    Type: Grant
    Filed: October 30, 2017
    Date of Patent: January 7, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sang Hyun Sohn, Joon Seok Ahn, Dae Hee Lee
  • Patent number: 10522970
    Abstract: A light-emitting device includes a laser diode element, a wavelength-converting member that absorbs light emitted from the laser diode element and converts wavelength of the light, and a transparent conductive film that is arranged on at least one of a light extracting-side surface and a laser diode element-side surface of the wavelength-converting member. The transparent conductive film is configured such that electrical resistance in a region overlapping the wavelength-converting member increases when the wavelength-converting member is damaged.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: December 31, 2019
    Assignee: TOYODA GOSEI CO., LTD.
    Inventors: Masaaki Osawa, Masao Kamiya, Satoshi Wada, Yuhki Kawamura, Kento Hayashi
  • Patent number: 10505337
    Abstract: A diode bar and a method for producing a laser diode bar are disclosed. In an embodiment a laser diode bar includes a plurality of emitters arranged side by side, the each emitter having a semiconductor layer sequence with an active layer suitable for generating laser radiation, a p-contact and an n-contact, wherein the emitters comprise a group of electrically contacted first emitters and a group of non-electrically contacted second emitters, wherein the p-contacts of the first emitters are electrically contacted by a p-connecting layer, and wherein the p-contacts of the second emitters are separated from the p-connecting layer by an electrically insulating layer and are not electrically contacted.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: December 10, 2019
    Assignee: OSRAM OPTO SEMICONDUCTOR GMBH
    Inventors: Sven Gerhard, Andreas Löffler
  • Patent number: 10494917
    Abstract: A method and system for transmitting information in well operations. The method for transmitting information may comprise splitting a coherent light into a plurality of wavelengths with a demultiplexer within a fiber comb transmitter and encoding information onto at least one of the plurality of wavelengths within the fiber comb transmitted. The method may further comprise combining the plurality of wavelengths into a second coherent light with a wavelength division multiplexer within the fiber comb transmitter and broadcasting the second coherent light from the frequency comb transmitter. A downhole telemetry system may comprise a frequency comb transmitter, which may comprise a laser source and a modulator. The modulator may further comprise a demultiplexer, an encoder, and a wavelength division multiplexer. The frequency comb transmitter may also comprise a fiber optic cable and a frequency comb receiver.
    Type: Grant
    Filed: November 13, 2015
    Date of Patent: December 3, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Daniel Joshua Stark, Satyan Gopal Bhongale
  • Patent number: 10495582
    Abstract: A DUV laser includes an optical bandwidth filtering device, such as etalon, which is disposed outside of the laser oscillator cavity of the fundamental laser, and which directs one range of wavelengths into one portion of a frequency conversion chain and another range of wavelengths into another portion of the frequency conversion train, thereby reducing the bandwidth of the DUV laser output while maintaining high conversion efficiency in the frequency conversion chain.
    Type: Grant
    Filed: August 8, 2017
    Date of Patent: December 3, 2019
    Assignee: KLA-Tencor Corporation
    Inventors: Yujun Deng, Yung-Ho Chuang, John Fielden
  • Patent number: 10484096
    Abstract: Provided are a relay apparatus and a relay method for a passive optical network so as to largely extend a communicable distance while maintaining compatibility with existing network components. In the case of applying an optical relay to the passive optical network, a delay time is reduced by applying the optical relay so that entire transmission delay time considering the increased delay time may be within a preamble period of the upstream burst stream, thereby rapidly increasing a transmission distance of the passive optical network by using the optical relay.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: November 19, 2019
    Assignee: LIGHTWORKS TECHNOLOGY INC
    Inventors: In Shik Seo, Joon Hyun Baek, Sung Hoon Park, Tae Jong Lee, Byoung Hoon Bae
  • Patent number: 10468851
    Abstract: A tunable laser that includes an array of parallel optical amplifiers is described. The laser may also include an intracavity N×M coupler that couples power between a cavity mirror and the array of parallel optical amplifiers. Phase adjusters in optical paths between the N×M coupler and the optical amplifiers can be used to adjust an amount of power output from M?1 ports of the N×M coupler. A tunable wavelength filter is incorporated in the laser cavity to select a lasing wavelength.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: November 5, 2019
    Assignee: Acacia Communications, Inc.
    Inventor: Christopher Doerr
  • Patent number: 10459330
    Abstract: The invention relates essentially to the field of hybrid nanocomposite materials for uses in volumetric projection, for example such as in 3D imaging (such as the field of entertainment or the medical field). In particular, the invention describes a binary hybrid projection matrix, including at least two types of (nano)particles and/or different molecules (quantum dots, metal nanoparticles; carbon nanotubes), a method for manufacturing the matrix and a 3D projection system and method that includes the use of the matrix. The addition of the second type of particles makes it possible to modify the properties of the matrix in order to achieve better volumetric projection performance or else to generate new features that did not exist with a single particle. The new matrix also makes it possible to reduce the power of the laser used for the projection while obtaining equivalent brightness to that of existing matrices.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: October 29, 2019
    Assignee: LUX IMAGE INC.
    Inventors: Claudine Allen, Simon Thibault, Alicia Talbot-Lanciault, Philippe Blais, Guillaume St-Onge, Pierre Desaulniers
  • Patent number: 10451955
    Abstract: An optical transmission apparatus includes a wavelength converter that wavelength-converts input signal light using a nonlinear optical medium to output the converted signal light, a memory that holds first information relating to a wavelength conversion characteristic of the wavelength converter, a communication interface that receives second information relating to a second wavelength conversion characteristic of an adjacent optical transmission apparatus, and a control circuit that determines, using the first information and the second information when the second information is received, an excitation light frequency at which a gain deviation of main signal light subjected to a wavelength conversion is minimized to set the determined excitation light frequency in the wavelength converter.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: October 22, 2019
    Assignee: FUJITSU LIMITED
    Inventor: Shota Mori
  • Patent number: 10444597
    Abstract: An optically nonlinear crystal is arranged for frequency-doubling an input pulse. The crystal has parallel facets each coated with a reflective coating. The crystal is arranged with respect to the input pulse such that the input pulse makes a plurality of forward and reverse passes between the coatings. A frequency-doubled pulse is generated on the forward passes. The input pulse and the frequency-doubled pulse propagate with different group velocities in the crystal such that temporal separation the pulses occurs. The crystal and reflective coatings are configured such that the temporal separation does not exceed a predetermined value.
    Type: Grant
    Filed: April 4, 2018
    Date of Patent: October 15, 2019
    Assignee: Coherent Scotland Limited
    Inventor: Ian MacGillivray
  • Patent number: 10439356
    Abstract: A semiconductor device including a substrate structure including a semiconductor material layer that is present directly on a buried dielectric layer in a first portion of the substrate structure and an isolation dielectric material that is present directly on the buried dielectric layer in a second portion of the substrate structure. The semiconductor device further includes a III-V optoelectronic device that is present in direct contact with the isolation dielectric material in a first region of the second portion of the substrate structure. A dielectric wave guide is present in direct contact with the isolation dielectric material in a second region of the second portion of the substrate structure.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: October 8, 2019
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Cheng-Wei Cheng, Ning Li, Devendra K. Sadana, Kuen-Ting Shiu
  • Patent number: 10386697
    Abstract: The ability to upconvert two low energy photons into one high energy photon has potential applications in solar cells, photodetectors and data storage. In this disclosure, CdSe and PbSe semiconductor nanocrystals are combined with molecular emitters (diphenylanthracene and rubrene) to upconvert photons in both the visible and near infrared spectral regions. Absorption of low energy photons by the nanocrystals is followed by energy transfer to the molecular triplet states, which then undergo triplet-triplet annihilation to create high energy singlet states that emit upconverted light. By using conjugated organic ligands on the nanocrystals to form an energy cascade, the upconversion process can be enhanced by up to three orders of magnitude. The use of different combinations of nanocrystals and emitters shows that this platform has great flexibility in the choice of both excitation and emission wavelengths.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: August 20, 2019
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Christopher John Bardeen, Ming Lee Tang, Kerry Miller Hanson, Zhiyuan Huang, Xin Li
  • Patent number: 10383690
    Abstract: The medical laser user interface of the present invention generally comprises a medical laser unit and a control system. The medical laser unit includes an optical probe for delivering laser light to a patient's tissue. The control system controls operation of the medical laser unit. Specifically, the control system provides a foot pedal system that enables the user to switch between the delivery of a first wavelength of laser light and a second wavelength of laser light through depression of a foot pedal. In a first embodiment, a single foot pedal can be used to toggle the wavelengths, where as in a second embodiment two foot pedals can be use, one for the first wavelength and one for the second wavelength. The two wavelengths provided include a wavelength for vaporization of tissue and a wavelength for coagulation.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: August 20, 2019
    Assignee: Boston Scientific Scimed, Inc.
    Inventors: Michael R. Hodel, Terry J. Smith
  • Patent number: 10379421
    Abstract: A method and system for utilizing the laser defocusing effect for phase matching of high order harmonic generation in a tight focusing geometry are provided. The most suitable focusing geometry, especially those five parameters including: (1) the aperture size of the adjustable iris, (2) the focus position with respect to the gas cell, (3) the backing pressure of the gas cell, (4) the focal length and (5) the length of the gas cell, for achieving phase matching of the target harmonic order and maximal yield of the target harmonic order are disclosed.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: August 13, 2019
    Assignee: NATIONAL TSING HUA UNIVERSITY
    Inventors: Ming-Chang Chen, Hung-Wei Sun, Pei-Chi Huang
  • Patent number: 10368061
    Abstract: An apparatus comprising an electromagnetic radiation source communicably coupled to a control system and a three dimensional (3D) image projector for outputting a plurality of image signals representative of a subject, the control system being configured to cause electromagnetic radiation to be applied to a plurality of sets of selected three-dimensional portions of a gaseous volume so as to heat and/or ionize the gas within selected portions, wherein each set of selected three-dimensional portions of gaseous volume intersects a path of a respective one of image signals, and wherein selected portions of each of set are spatially located together in a substantially unbroken three-dimensional configuration and selectable orientated and configured to simulate an electromagnetic radiation path modifying element for directing a respective image signals incident thereon to a selected location within a viewing region.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: July 30, 2019
    Assignee: BAE Systems plc
    Inventor: Nicholas Giacomo Robert Colosimo
  • Patent number: 10353269
    Abstract: A fully confined dual frequency optical resonator configured for optical coupling to light having a first frequency ?1. The dual frequency optical resonator includes a plurality of alternating layer pairs configured in a grating configuration, each layer pair having a first layer formed of a first material and a second layer formed of a second material, the first material and second material being different materials. Each layer having a thickness different than a thickness of an adjacent layer to provide thereby aperiodic layer pairs, the thicknesses of adjacent layers being selected to create, via wave interference with each layer, optical resonances at the first frequency ?1 and a second frequency ?2 which is a harmonic of ?1, and to ensure a maximum spatial overlap between confined modes over the materials such that an overall quality factor Q of at least 1000 is achieved.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: July 16, 2019
    Assignees: THE TRUSTEES OF PRINCETON UNIVERSITY, PRESIDENT AND FELLOWS OF HARVARD COLLEGE, MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Alejandro Rodriguez, Zin Lin, Steven G. Johnson, Marko Loncar, Xiangdong Liang
  • Patent number: 10351580
    Abstract: Provided herein are transmitter ligands that improve photon upconversion of near infrared light (NIR) to visible light. The presently provided ligands are complexed to semiconductor nanocrystals and improve triplet energy transfer from semiconductor nanocrystal to annihilator in triplet-triplet annihilation. Suitable applications include bio-imaging.
    Type: Grant
    Filed: February 16, 2018
    Date of Patent: July 16, 2019
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Ming Lee Tang, Xin Li, Zhiyuan Huang, Melika Mahboub
  • Patent number: 10345688
    Abstract: The invention provides a light emitting apparatus including a projector color wheel and a light emitting diode (LED) device using a composite material, a method of manufacturing the composite material, and an optical film. The stability of the composite material has been greatly improved. Light emitting devices using the composite material have wide color gamut.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: July 9, 2019
    Assignee: Unique Materials Co., Ltd.
    Inventors: Pi-Tai Chou, Shang-Wei Chou
  • Patent number: 10347800
    Abstract: Embodiments of the invention include a light emitting device, a first wavelength converting material, and a second wavelength converting material. The first wavelength converting material includes a nanostructured wavelength converting material. The nanostructured wavelength converting material includes particles having at least one dimension that is no more than 100 nm in length. The first wavelength converting material is spaced apart from the light emitting device.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: July 9, 2019
    Assignee: LUMILEDS LLC
    Inventors: Debasis Bera, Mark Melvin Butterworth, Oleg Borisovich Shchekin
  • Patent number: 10274809
    Abstract: Techniques are provided for a multiwavelength laser source and a method of driving the multiwavelength laser source. The multiwavelength laser source includes: a plurality of seed lasers to generate a corresponding plurality of seed beams having a corresponding plurality of distinct seed wavelengths; a laser combiner to receive and combine the seed beams into a single first beam; an optical amplifier to amplify the first beam; and a single fixed nonlinear converter to convert and output the amplified first beam as a multiwavelength second beam including the seed wavelengths and one or more new wavelengths distinct from and generated from the seed wavelengths. In some embodiments, the nonlinear converter is an optical parametric oscillator (OPO) or an optical parametric generator (OPG). In some other embodiments, the nonlinear converter is a sum frequency generator (SFG), a difference frequency generator (DFG), or an optical parametric amplifier (OPA).
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: April 30, 2019
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventors: Leonard A. Pomeranz, Peter A. Budni
  • Patent number: 10254475
    Abstract: The invention relates to a microstructured optical fiber for generating supercontinuum light upon feeding of pump light. The light can be incoherent light. The microstructured optical fiber has a first section and a second section, where the first and second sections have one or more different features. The invention also relates to a supercontinuum source comprising a microstructured optical fiber according to the invention.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: April 9, 2019
    Assignee: NKT PHOTONICS A/S
    Inventors: Jeppe Johansen, Ole Bang, Casper Larsen, Thomas Feuchter, Carsten L. Thomsen, Thomas Vestergaard Andersen
  • Patent number: 10250006
    Abstract: Disclosed is a system for generating wavelength-tunable, ultra-short light pulses within the visible or infrared light spectrum. The system includes an injection module including a light source and a wavelength-tunable spectral filter. The light source is suitable for generating short light pulses, having a duration measured in nanoseconds, within an emission spectrum having a spectral width of several tens of nanometers to several hundred nanometers. The spectral filter has a spectral width between 250 pm and 3 nm and is suitable for spectrally and temporally filtering the short light pulses such that the injection module generates wavelength-tunable, spectrally filtered, ultra-short light pulses. The system also includes at least one optical amplifier suitable for generating wavelength-tunable, ultra-short, amplified pulses based on the wavelength of the spectral filter.
    Type: Grant
    Filed: December 24, 2015
    Date of Patent: April 2, 2019
    Assignees: UNIVERSITE DE BORDEAUX, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Eric Cormier, Jérome Lhermite, Romain Royon, Laurent Sarger
  • Patent number: 10228607
    Abstract: A second harmonic generator may include a combiner to combine a fundamental optical beam with a residual fundamental optical beam. The second harmonic generator may include a second harmonic crystal, coupled to the combiner, to generate a second harmonic optical beam from the fundamental optical beam and the residual fundamental optical beam. Upon generation of the second harmonic optical beam, the residual fundamental optical beam may exit the second harmonic crystal.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: March 12, 2019
    Assignee: Lumentum Operations LLC
    Inventors: Martin H. Muendel, James J. Morehead
  • Patent number: 10222678
    Abstract: According to an aspect, the present description concerns a frequency-tunable laser source comprising: a set of N elementary sources (101-k), each elementary source being suitable for emitting a beam at a given central frequency (fk); an optical coupler (12) for coupling the beams emitted by each of the elementary sources in order to form a multi-spectral incident beam (Bin) regrouping all the frequencies of the N elementary sources in a same optical beam; a beam splitter (15) for forming, from the incident beam (Bin), a first beam (B1) and a second beam (B2), each regrouping all the frequencies of the elementary sources; a first tunable filter (16) for selecting, from the first beam (B1), a third beam (B3) at a first frequency (Fj); a second tunable filter (17) for selecting, from the second beam (B2), a fourth beam (B4) at a second frequency (Fl); a nonlinear frequency doubling crystal (18) for generating, from the third beam at the first frequency (Fj), a fifth beam (B5) having a frequency (F2j) which is tw
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: March 5, 2019
    Assignees: Centre National De La Recherche Scientifique—CNRS, Observatoire de Paris
    Inventor: Mohand Ouali Acef
  • Patent number: 10216016
    Abstract: Methods, systems, and devices are disclosed for linear optical phase modulators. In some aspects, a linear optical phase modulator device is provided to include a substrate; a PN junction formed on the substrate to include a P region, a N region and a depletion region formed by the P and N regions; and an optical waveguide formed on the substrate and structured to guide light in one or more optical modes to have a spatial optical intensity distribution based on a free carrier density spatial distribution in the PN junction in such that the depletion region exhibits a substantially linear response with regard to a voltage applied to the PN junction to modulate a phase of the light guided by the optical waveguide.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: February 26, 2019
    Assignee: Cornell University
    Inventors: Yoon Ho Lee, Jaime Cardenas, Michal Lipson
  • Patent number: 10216062
    Abstract: An electromagnetic frequency converter includes an atomic ensemble; one or more first sources (6, 8) of electromagnetic radiation (P, R) to be incident upon the atomic ensemble to excite atomic valence electrons from a ground state to a first Rydberg state; one or more second sources (6, 14) of electromagnetic radiation (A, C) to be incident upon the atomic ensemble to excite atomic valence electrons from an excited state to a second Rydberg state; a first input (20) and/or output (26) for electromagnetic radiation (L) to be incident upon the atomic ensemble from the first input or received from the atomic ensemble at the first output; and a second input (14) and/or output (24) for electromagnetic radiation (M) to be incident upon the atomic ensemble from the second input or received from the atomic ensemble at the second output.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: February 26, 2019
    Inventors: Martin Kiffner, Amir Feizpour, Joshua Nunn
  • Patent number: 10175554
    Abstract: An apparatus for producing a single photon can comprise a modulator that modulates the wavelength of a pump beam based on wavelength of an idler photon of a signal/idler photon pair. A wavelength division multiplexer combines the modulated pump beam and the signal photon in a non-linear element to produce an output photon having a preselected wavelength based on signal photon wavelength and a wavelength of the modulated pump beam.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: January 8, 2019
    Assignee: UT-Battelle, LLC
    Inventors: Warren P. Grice, Joseph M. Lukens, Nicholas A. Peters
  • Patent number: 10156025
    Abstract: Heterogeneous monolithic crystals that can include multiple regimes in a complex geometry are described. The crystals can be advantageously utilized in laser applications. The heterogeneous crystals can be created through growth of different regimes in interior voids formed in a seed crystal, which can in turn be homogeneous or heterogeneous. In one particular embodiment, a regime can be grown within a void of a seed crystal by use of a hydrothermal growth process. Formed crystals can be utilized in lasing and waveguiding applications, among others.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: December 18, 2018
    Assignee: University of South Carolina
    Inventors: Joseph W. Kolis, Colin D. McMillen