Temporal Optical Modulation Within An Optical Waveguide Patents (Class 385/1)
  • Patent number: 10895683
    Abstract: A semiconductor device includes an insulating layer, an optical waveguide formed on the insulating layer, a multilayer wiring layer formed on the insulating layer such that the multilayer wiring layer covers the optical waveguide, and a first inductor formed in the multilayer wiring layer.
    Type: Grant
    Filed: October 14, 2019
    Date of Patent: January 19, 2021
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Teruhiro Kuwajima, Yasutaka Nakashiba
  • Patent number: 10866438
    Abstract: A Faraday-based polarization scrambler is disclosed. The Faraday-based polarization scrambler may comprise a first toroidal assembly. The first toroidal assembly may include an optical fiber that is looped to form a first looped portion, and a first electrical wire that coils around the first looped portion to form a first toroidal configuration. In some examples, the first electrical wire may be connected to a voltage source and carries a current to form a magnetic field within the first toroidal configuration. In some examples, there may be additional toroidal assemblies provided to the Faraday-based polarization scrambler. One or more of these toroidal assemblies may create an actuation field to effect modulation for polarization scrambling and emulation that mitigates polarization-dependent effects.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: December 15, 2020
    Assignee: VIAVI SOLUTIONS INC.
    Inventors: Joshua Philipson, Christopher Russell Wagner
  • Patent number: 10833056
    Abstract: The invention relates to an electrooptical device comprising a semiconductor substrate having a front side and a back side, at least one photonic component arranged on the front side of the semiconductor substrate, the photonic component comprising an active layer made of a non-linear optical material, wherein at least one cavity, extends through the semiconductor substrate and connects the active layer on the front side of the semiconductor substrate with the back side of the semiconductor substrate.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: November 10, 2020
    Assignee: IHP GMBH—INNOVATIONS FOR HIGH PERFORMANCE MICROELECTRONICS/LEIBNIZ-INSTITUT FUR INNOVATIVE MIKROELEKTRONIK
    Inventors: Patrick Steglich, Andreas Mai, Christian Mai, Sigurd Schrader
  • Patent number: 10828894
    Abstract: An actuator includes an actuator substrate and a diaphragm forming an inner wall defining a space in the actuator substrate. The diaphragm includes a first layer made of material that does not transmit light of a specific wavelength; a second layer made of material that transmits the light of a specific wavelength; an active region covering a central area of the diaphragm, the active region including the first layer and the second layer; and at least two transmissive regions formed at a circumference of the diaphragm, each of the at least two transmissive regions including the second layer without the first layer.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: November 10, 2020
    Assignee: Ricoh Company, Ltd.
    Inventor: Takahiko Kuroda
  • Patent number: 10812183
    Abstract: An apparatus for mitigating polarization dependent loss (PDL) in an optical signal-to-noise ratio (OSNR) of a modulated optical signal is disclosed. The apparatus may comprise a spectrum analyzer to measure an optical power spectrum of a modulated optical signal. The apparatus may also comprise a measuring unit to select a first portion of the modulated optical signal and a second portion of the modulated optical signal, where each of the first and second portions of the modulated optical signals may include an independent noise distribution indicative of PDL, and measure a time-varying parameter of the first and second portions. The apparatus may also include a signal processor to PDL in an OSNR by transforming any elliptical polarization associated with the independent noise distribution into a ball polarization, determining a correlation between time-varying parameters of the first and second portions, and calculating a PDL mitigated OSNR.
    Type: Grant
    Filed: February 15, 2019
    Date of Patent: October 20, 2020
    Assignee: VIAVI SOLUTIONS INC.
    Inventor: Georg Rudolph
  • Patent number: 10788726
    Abstract: An optical modulator includes an optical modulation element having a plurality of signal electrodes; a plurality of signal input terminals each of which inputs an electrical signal to be applied to each signal electrode; a relay substrate on which a plurality of signal conductor patterns electrically connecting the signal input terminals and the signal electrodes, and a plurality of ground conductor patterns are formed; and a housing that houses the optical modulation element and the relay substrate, in which the relay substrate has at least one groove extending from the signal input side on which the signal input terminal is connected to the signal conductor pattern, in at least one ground conductor pattern formed between adjacent signal conductor patterns, and the groove is formed such that a length extending from the signal input side is longer than a length of the signal input terminal extending on the signal conductor pattern.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: September 29, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Norikazu Miyazaki, Toru Sugamata
  • Patent number: 10775561
    Abstract: An optoelectronic component includes a chip having a substrate and at least one optical waveguide integrated in the chip. The electro-optical component may be monolithically integrated in one or a plurality of semiconductor layers of the chip arranged on the substrate top side of the substrate, or on the substrate top side of the substrate. At least one electrical connection of the monolithically integrated electro-optical component is connected by means of a connection line to a conductor track connection situated below the substrate rear side. The connection line extends through a hole in the substrate from the electro-optical component to the conductor track connection situated below the substrate rear side.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: September 15, 2020
    Assignee: TECHNISCHE UNIVERSITÄT BERLIN
    Inventors: Stefan Meister, Hanjo Rhee, Christoph Theiss, Sebastian Kupijai
  • Patent number: 10775651
    Abstract: This disclosure provides systems, methods, and apparatus related to optical modulators. In one aspect, a device includes a substrate, a first electrically insulating material disposed over the substrate, a first graphene layer and a second graphene layer disposed in the first electrically insulating material and being separated by the first electrically insulating material, and a waveguide disposed on the first electrically insulating material. At least a portion of the second graphene layer overlays at least a portion of the first graphene layer. The waveguide overlays both the first graphene layer and the second graphene layer.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: September 15, 2020
    Assignee: The Regents of the University of California
    Inventors: Hamed Dalir, Yang Xia, Yuan Wang, Xiang Zhang
  • Patent number: 10770374
    Abstract: The present disclosure relates to semiconductor structures and, more particularly, to through-silicon vias (TSV) for heterogeneous integration of semiconductor device structures and methods of manufacture. The structure includes: a plurality of cavity structures provided in a single substrate; at least one optical device provided on two sides of the single substrate and between the plurality of cavity structures; and a through wafer optical via extending through the substrate, between the plurality of cavity structures and which exposes a backside of the at least one optical device.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: September 8, 2020
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Siva P. Adusumilli, Steven M. Shank
  • Patent number: 10768365
    Abstract: A method for fabricating a photonic integrated circuit (PIC) comprises providing a silicon-on-insulator (SOI) wafer comprising an insulator layer disposed between a base semiconductor layer and a SOI layer, wherein the SOI layer comprises a waveguide, providing at least one slot within the SOI layer, wherein the at least one slot is positioned on the same or opposite sides of the waveguide, and wherein the at least one slot is positioned at a predetermined distance away from the waveguide, and removing a portion of the insulator layer to form an etched-out portion of the insulator layer, wherein the etched-out portion is positioned directly beneath the waveguide, and wherein a width of the etched-out portion is at least the width of the waveguide.
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: September 8, 2020
    Assignee: Futurewei Technologies, Inc.
    Inventors: Dawei Zheng, Ge Yi, Li Yang, Xiao Shen
  • Patent number: 10754143
    Abstract: An optical scanning method includes detecting a resonance frequency of a tip of a fiber while sweeping a vibration frequency of the tip of the fiber over a predetermined frequency range, the tip of the fiber being supported to allow oscillation, determining a driving frequency of the tip of the fiber on the basis of the detected resonance frequency, and scanning light over an object by causing the light to be emitted from the tip of the fiber while driving and vibrating the tip of the fiber at the driving frequency.
    Type: Grant
    Filed: January 11, 2018
    Date of Patent: August 25, 2020
    Assignee: OLYMPUS CORPORATION
    Inventor: Ken Fujinuma
  • Patent number: 10754221
    Abstract: An optical device may include a waveguide-based Mach-Zehnder (MZ) interferometer associated with performing polarization multiplexing or demultiplexing. The waveguide-based MZ interferomenter may include a first MZ arm, a second MZ arm, and a set of stress-balancing trenches. A portion of the first MZ arm may be between at least two stress-reducing trenches of a plurality of stress-reducing trenches. The plurality of stress-reducing trenches may be in a cladding layer on a substrate. The set of stress-balancing trenches may be on an opposite side of the second MZ arm from the plurality of stress-reducing trenches. The set of stress-balancing trenches may be in the cladding layer on the substrate.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: August 25, 2020
    Assignee: Lumentum Operations LLC
    Inventor: Hiroaki Yamada
  • Patent number: 10739390
    Abstract: A system is provided for use with an optical input signal for detecting a phase difference between a first RF signal having a first phase and a second RF signal having a second phase. The system includes and optical waveguide, a first optical resonant cavity, a first RF receiver, a second optical resonant cavity and a second RF receiver. The optical resonant cavities include a non-linear electro-optical material. The first RF receiver affects the first non-linear electro-optical material of the first optical resonant cavity. The second RF receiver affects the second non-linear electro-optical material of first optical resonant cavity. The optical waveguide outputs an optical output signal based on the optical input signal as modified by the first optical resonant cavity as affected by the first RF receiver receiving the first RF signal and as modified by the second optical resonant cavity as affected by the second RF receiver.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: August 11, 2020
    Assignee: United States of America as represented by the Secretary of the Navy
    Inventors: Stephanie Claussen, Benjamin J. Taylor, Anna M. Leese de Escobar
  • Patent number: 10739624
    Abstract: An optical control element including an optical waveguide formed by using diffusion of titanium that is formed on a lithium niobate substrate and a control electrode formed on the lithium niobate substrate that is provided in the vicinity of the optical waveguide, in which an amount of a hydroxyl group absorbed into the lithium niobate substrate is set to be in a range of 0.5 to 2.5 cm?1.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: August 11, 2020
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Yuji Yamane, Tetsuya Fujino, Hideki Ichimei
  • Patent number: 10732481
    Abstract: To provide a highly-reliable low-cost small optical modulator in which temperature drift is suppressed and an optical transmission device using the same. An optical modulator including an optical waveguide substrate 1 on which an optical waveguide is formed, a signal electrode which is provided on the optical waveguide substrate and applies an electric field to the optical waveguide, a termination substrate 3 provided with a termination resistor that terminates the signal electrode, and a housing 6 in which the optical waveguide substrate and the termination substrate are mounted, in which, in order to suppress conduction of heat generated from the termination resistor to the optical waveguide substrate through the housing, a groove 8 is formed in the housing 6 between the termination substrate 3 and the optical waveguide substrate 1.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: August 4, 2020
    Assignee: Sumitomo Osaka Cement Co., Ltd.
    Inventor: Toru Sugamata
  • Patent number: 10684530
    Abstract: Structures for an electro-optic modulator and methods of fabricating a structure for an electro-optic modulator. An electro-optic modulator is arranged over a portion of a waveguide core. The electro-optic modulator includes an electrode, an active layer arranged adjacent to the electrode, and a dielectric layer including a portion that has a lateral arrangement between the electrode and the active layer. The active layer is composed of a material having a refractive index that is a function of a bias voltage applied to the electrode and the active layer.
    Type: Grant
    Filed: February 28, 2019
    Date of Patent: June 16, 2020
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Yusheng Bian, Ajey Poovannummoottil Jacob, Abu Thomas
  • Patent number: 10678113
    Abstract: Systems and methods are provided for a low impedance optical modulator in an optical device. The optical device includes a distributed amplifier having a plurality of gain stages and is configured to receive a radio frequency (RF) signal at an input of the distributed amplifier having a first impedance and provide an amplified version of the RF signal with a voltage gain produced through the plurality of gain stages to an output of the distributed amplifier having a second impedance smaller than the first impedance. The optical device includes an optical modulator coupled to the distributed amplifier and is configured to receive the amplified version of the RF signal at an input of the optical modulator having a same impedance as the output of the distributed amplifier and modulate the amplified version of the RF signal to produce an intensity modulated optical signal at an output of the optical modulator.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: June 9, 2020
    Assignee: LOCKHEED MARTIN CORPORATION
    Inventors: Anthony C. Kowalczyk, Xipeng Sui, Nicholas D. Saiz
  • Patent number: 10670942
    Abstract: The invention relates to an optical device (100) comprising: a waveguide (200) comprising a core (210) extending along an axis of symmetry XX?, and encapsulated in a cladding layer (220), an actuator (400) with width La, overlapping the core (210) and extending along an axis of symmetry YY? parallel to the axis of symmetry XX?, said actuator (400) is designed so that when a voltage is applied to it, it imposes a mechanical stress at the core (210) to modify its refraction index the device being characterised in that the second axis of symmetry YY? is offset by a lateral offset D from a plane of symmetry of the waveguide (200) including the first axis of symmetry and perpendicular to the cladding layer (220), the lateral offset is between 15% and 50% of the width La.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: June 2, 2020
    Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
    Inventors: Fabrice Casset, Thierry Hilt
  • Patent number: 10670804
    Abstract: Waveguiding structures and methods of fabricating a waveguiding structure. The waveguiding structure includes a waveguide and an array of semiconductor fins that are arranged at least in part inside the waveguide.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: June 2, 2020
    Assignee: GLOBALFOUNDRIES INC.
    Inventors: Yusheng Bian, Abu Thomas, Ajey Poovannummoottil Jacob
  • Patent number: 10606067
    Abstract: A drive-condition setting device applied to an optical scanning apparatus having a fiber and an actuator that vibrates a distal end of the fiber, the drive-condition setting device detects a scan pattern of the illumination light output from the fiber, measures resonance frequencies in the x direction and the y direction of the fiber, sets a drive frequency and a drive voltage based on the resonance frequencies such that conditional expressions below are satisfied: when fx>fy, fd<fy and Vx?Vy (1) or fd>fx and Vx?Vy (2), and when fx?fy, fd<fx and Vx?Vy (3) or fd>fy and Vx?Vy (4) where fd denotes the drive frequency, Vx denotes a maximum voltage of a X direction drive signal, and Vy denotes a maximum voltage of a y direction drive signal.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: March 31, 2020
    Assignee: OLYMPUS CORPORATION
    Inventors: Atsuyoshi Shimamoto, Masashi Yamada, Soichiro Koshika
  • Patent number: 10598832
    Abstract: Embodiments herein provide systems and methods for forming an optical component. A method may include providing a plurality of proximity masks between a plasma source and a workpiece, the workpiece including a plurality of substrates secured thereto. Each of the plurality of substrates may include first and second target areas. The method may further include delivering, from the plasma source, an angled ion beam towards the workpiece, wherein the angled ion beam is then received at one of the plurality of masks. A first proximity mask may include a first set of openings permitting the angled ion beam to pass therethrough to just the first target area of each of the plurality of substrates. A second proximity mask may include a second set of openings permitting the angled ion beam to pass therethrough just to the second target area of each of the plurality of substrates.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: March 24, 2020
    Assignee: Varian Semiconductor Equipment Associates, Inc.
    Inventors: Morgan Evans, Rutger Meyer Timmerman Thijssen, Joseph Olson, Peter Kurunczi, Robert Masci
  • Patent number: 10543065
    Abstract: An intraoral scanner includes an image sensor, a projection module, a motion sensor, a memory unit and a processor. The motion sensor senses three motion variations corresponding to three axes according to a motion state of the intraoral scanner. The memory unit stores three first variation thresholds corresponding to the three axes. The processor determines whether the three motion variations are smaller than or equal to the three first variation thresholds, respectively. When the processor determines that at least one of the three motion variations is smaller than or equal to the three first variation thresholds, the processor enables the image sensor and the projection module. When the processor determines that all of the three motion variations are larger than the three first variation thresholds, the processor disables at least one of the image sensor and the projection module.
    Type: Grant
    Filed: January 17, 2019
    Date of Patent: January 28, 2020
    Assignee: Qisda Corporation
    Inventors: Chi-Cheng Lin, Chuang-Wei Wu, Tsung-Hsi Lee
  • Patent number: 10530487
    Abstract: A distributed traveling-wave Mach-Zehnder modulator driver having a plurality of modulation stages that operate cooperatively (in-phase) to provide a signal suitable for use in a 100 Gb/s optical fiber transmitter at power levels that are compatible with conventional semiconductor devices and conventional semiconductor processing is described.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: January 7, 2020
    Assignee: Elenion Technologies, LLC
    Inventors: Ran Ding, Thomas Wetteland Baehr-Jones, Michael J. Hochberg, Alexander Rylyakov
  • Patent number: 10502948
    Abstract: A fiber scanning system can have optimized performance by substantially matching the natural frequencies of the fiber scanning system's actuator and fiber optic scanning element. By matching the natural frequencies, the fiber scanning system can increase the maximum distance that the tip of the fiber optic scanning element may be driven relative to a resting position. Such an effect may be produced because matching the natural frequencies of the fiber scanner allows for larger amplitudes to be achieved. It should be noted that the natural frequency of the scanning system can be selected to avoid excitation frequencies that could destabilize the system. In this way, the system as a whole may act as a tuned mass damper or a tuned resonance structure, thereby improving scan performance while maintaining a stable scanning system.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: December 10, 2019
    Assignee: MAGIC LEAP, INC.
    Inventors: Timothy Mark Dalrymple, Alejandro Lopez, William K. Jones, Jr., Andrew C. Duenner
  • Patent number: 10446917
    Abstract: Deformable magnetic antennas are provided to include a plurality of flexible magnetic antenna layers stacked to form a layered magnetic antenna structure that is bendable. Each flexible magnetic antenna layer includes a magnetic material that confines a magnetic field to concentrate a magnetic flux of the magnetic field inside the magnetic antenna layer. A lubricating material is applied between adjacent flexible magnetic antenna layers to allow adjacent magnetic layers to move relative to one another when the layered magnetic antenna structure is bent so as to reduce a stress in each flexible magnetic antenna layer caused by bending the layered magnetic antenna structure.
    Type: Grant
    Filed: December 3, 2016
    Date of Patent: October 15, 2019
    Assignee: General Atomics
    Inventors: Mark Eugene Bonebright, Mark William Covington, Jeffrey Howard Caton
  • Patent number: 10444551
    Abstract: Embodiments may relate to a transmission line to be coupled with an electromagnetic waveguide. The transmission line may include a signal node with a first contact, a second contact, and a via between first contact and the second contact. The transmission line may further include a ground node with a third contact, a fourth contact, and a via between the third contact and the fourth contact. Other embodiments may be described or claimed.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: October 15, 2019
    Assignee: Intel Corporation
    Inventors: Jeffrey B. Driscoll, Ling Liao, David Patel
  • Patent number: 10429583
    Abstract: An optical branching waveguide disclosed herein includes: a substrate; a first optical waveguide provided on the substrate; a second optical waveguide provided on the substrate and arranged close to the first optical waveguide; and a cladding layer covering either one of a first portion of the first optical waveguide and a second portion of the second optical waveguide and including an opening the other one of the first portion and the second portion. The effective refractive index of the first optical waveguide at the first portion and the effective refractive index of the second optical waveguide at the second portion become equal in either one of a state where resin is present in the opening and a state where the resin is not present in the opening.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: October 1, 2019
    Assignee: FUJITSU LIMITED
    Inventor: Akio Sugama
  • Patent number: 10425155
    Abstract: Provided are a device and method for free space coherent optical communications by means of an automatic compensation for phase noise in atmosphere using a femtosecond laser optical comb, and more particularly, a device and method for free space coherent optical communications by means of an automatic compensation for phase noise in atmosphere using a femtosecond laser optical comb, in which a phase shift value due to atmospheric turbulence is obtained from reflected light of transmission light generated from a femtosecond laser optical comb and the transmission light is pre-distorted on the basis of the phase shift value, thereby pre-compensating, in a transmission end, for phase noise due to atmospheric turbulence.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: September 24, 2019
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Seung-Woo Kim, Young-Jin Kim, Byung Jae Chun, Hyun Jay Kang
  • Patent number: 10414001
    Abstract: To provide a galvanometer scanner that increases reliability by reducing burden on a mechanism unit. A galvanometer scanner converts a command for machining position on a machining target to movement commands for a rotary motor, a rotary motor, and a direct drive mechanism. If the movement command for the direct drive mechanism contains a weak direct drive component depending on the movement command for the rotary motor, and falling within an amplitude range not exceeding a predetermined amplitude and within a frequency range not falling below a predetermined frequency, the galvanometer scanner removes the weak direct drive component from the movement command for the direct drive mechanism, and then outputs control signals corresponding to the movement commands for the rotary motors and the direct drive mechanism. The galvanometer scanner controls the rotary motors and the direct drive mechanism based on the control signals.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: September 17, 2019
    Assignee: FANUC CORPORATION
    Inventors: Yoshinori Murakami, Satoru Kawai
  • Patent number: 10418943
    Abstract: A method for down-converting an RF signal is described that optically phase modulates an RF signal onto an optical carrier then applies an RF local oscillator (LO) phase modulation which down-converts the RF signal to an intermediate frequency after appropriate optical signal processing and optical-to-electrical photo-detection. The LO phase modulator is constructed such that a common hot electrode is shared among more than one optical mode, where an optical mode can be separate waveguides or optical wavelengths. The relative phase of the LO frequency applied to each optical mode can be different between the different optical modes. The resulting down-converted photo-detected signals of different LO-phase can be processed to reduce noise. A single LO phase modulator can down-convert multiple RF signals carried by multiple optical wavelengths, and a harmonic generation stage with multi-phase-matching peaks can be used to linearize each RF signal.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: September 17, 2019
    Assignee: Nucript LLC
    Inventor: Gregory S. Kanter
  • Patent number: 10401658
    Abstract: Provided is an optical modulator including: a relay substrate; a first transmission line that is provided on a flat surface of the relay substrate, and transmits an electrical signal along the flat surface; a second transmission line that is provided separately from the relay substrate, is electrically connected to the first transmission line, and transmits, to the first transmission line, the electrical signal that has been input from an outer side in a direction that is not included in the flat surface; a modulation unit that modulates an optical signal by using the electrical signal that is transmitted by the first transmission line and the second transmission line; and a shield that shields a radiation component of the electrical signal that is radiated from the second transmission line.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: September 3, 2019
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Toshio Kataoka, Kei Kato, Junichiro Ichikawa
  • Patent number: 10320488
    Abstract: A distributed traveling-wave Mach-Zehnder modulator driver having a plurality of modulation stages that operate cooperatively (in-phase) to provide a signal suitable for use in a 100 Gb/s optical fiber transmitter at power levels that are compatible with conventional semiconductor devices and conventional semiconductor processing is described.
    Type: Grant
    Filed: December 14, 2018
    Date of Patent: June 11, 2019
    Assignee: Elenion Technologies, LLC.
    Inventors: Ran Ding, Thomas Wetteland Baehr-Jones, Michael J. Hochberg, Alexander Rylyakov
  • Patent number: 10305599
    Abstract: In an optical transmitter module for combining three or more optical signals different in intensity with an optical multiplexer to generate a PAM signal, the influence of the beat noise and the chromatic dispersion due to the difference in wavelength is reduced. The optical transmitter module includes first through third optical signal sources adapted to output respective optical signals binary intensity modulated with different amplitude from each other, and a combining section. The combining section has a wavelength multiplexer adapted to wavelength-multiplex a plurality of input optical signals having different wavelengths from each other while keeping the respective polarization states, and a polarization multiplexer adapted to polarization-multiplex a pair of input optical signals having respective polarization states perpendicular to each other, and the combining section combines the input optical signals from the first through third optical signal sources with each other to generate a PAM8 signal.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: May 28, 2019
    Assignee: Oclaro Japan, Inc.
    Inventors: Kouji Nakahara, Hiroaki Inoue
  • Patent number: 10295738
    Abstract: An electro-optical modulator is provided. The modulator comprises a first and a second optical waveguide, at least one first capacitance, via which a voltage can be applied to a light-guiding region of the first optical waveguide, at least one second capacitance, via which a voltage can be applied to a light-guiding region of the second optical waveguide, an electrically conductive region, via which the first and second capacitances are electrically connected to one another, and a feed line to the electrically conductive region, via which feed line a DC voltage can be applied to the electrically conductive region, wherein the feed line is constituted such that it represents an electrical resistance connected in parallel with the second capacitance, and a compensation resistance connected in parallel with the first capacitance and serving for reducing transients in a voltage profile on the first and second capacitances during the operation of the modulator.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: May 21, 2019
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventor: Heinz-Gunter Bach
  • Patent number: 10284288
    Abstract: A fiber link system, method and device for masking signals on a fiber link system. The system includes sending a desired sequence of information in the form of a true signal that is typically intended to be transferred between legitimate users at both ends of a link. Sending chaff signals, or subterfuge signals, alongside the true signal to mask such legitimate signals in the fiber cable from intruders tapping into the fiber cable.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: May 7, 2019
    Assignee: APRIORI NETWORK SYSTEMS, LLC
    Inventor: Gary M. Weiner
  • Patent number: 10277311
    Abstract: Systems and methods using a bi-directional Optical Time Domain Reflectometer (OTDR) to monitor a fiber optic communication system including a first node and a second node. The systems and methods include performing a first OTDR measurement at a first OTDR wavelength at the first node on a first fiber; performing a second OTDR measurement at a second OTDR wavelength at the second node on the first fiber; and utilizing the first OTDR measurement and the second OTDR measurement for event detection on the first fiber.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: April 30, 2019
    Assignee: Ciena Corporation
    Inventors: Jean-Luc Archambault, David W. Boertjes
  • Patent number: 10261385
    Abstract: A light modulation element constituted by a substrate type optical waveguide has a Mach-Zehnder interferometer; and a traveling wave electrode having a signal electrode arranged at least between a first phase modulator and a second phase modulator and electrically connected to both of the first phase modulator and the second phase modulator. A polarity of a semiconductor region of the first phase modulator connected to the signal electrode and a plurality of a semiconductor region of the second phase modulator connected to the signal electrode are different from each other.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: April 16, 2019
    Assignee: FUJIKURA LTD.
    Inventor: Kazuhiro Goi
  • Patent number: 10247850
    Abstract: A laser seismometer may measure the change in a phase modulated optical signal. Unlike traditional interferometers, the laser phase is first modulated by a radio frequency (RF) source, which is then demodulated following detection to provide the signal of interest. The net result is a direct measurement of displacement with the effects of amplitude noise eliminated via limiting and the effects of 1/f phase noise (frequency drift, etc.) eliminated by self-interfering the signal. Because the signal-to-noise ratio (SNR) of the optical signal is strong, the technique provides a strong measure of the displacement and avoids the extremely low voltages and associated problems of traditional sensors.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: April 2, 2019
    Assignee: Triad National Security, LLC
    Inventors: Stephen Judd, Gerald Seitz, Michael Shinas, Matthew Briggs
  • Patent number: 10236657
    Abstract: A device and method for tuning a ring resonator using self-heating stabilization is provided. A light source is controlled to produce an optical signal, input to an optical ring resonator, at a power where self-heating shifts a resonance wavelength of the optical ring resonator by at least 10 picometers, the self-heating comprising absorption in the optical ring resonator of optical power from a received optical signal. Prior to using the optical ring resonator at least one of modulate and filter the optical signal at the optical ring resonator, a heater of the optical ring resonator is controlled to an operating temperature at which the resonance wavelength of the optical ring resonator is greater than a respective wavelength of the optical signal.
    Type: Grant
    Filed: February 9, 2018
    Date of Patent: March 19, 2019
    Assignee: RANOVUS INC.
    Inventors: Bin Cao, Dylan Logan, Douglas J. S. Beckett, Rong Chen, Andrew Peter Knights
  • Patent number: 10215692
    Abstract: There is provided an optical waveguide structure, including a substrate, an insulating layer disposed on the substrate whereby the insulating layer includes an air slot formed therein, a first material layer suspended over the air slot whereby the first material layer constitutes a waveguide core of the optical waveguide structure, and a second material layer disposed over the waveguide core whereby the waveguide core is suspended over the air slot by the second material layer. There is also provided an optical gas sensor incorporating the optical waveguide structure and methods of fabrication thereof.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: February 26, 2019
    Assignee: Agency for Science, Technology and Research
    Inventors: Jifang Tao, Hong Cai, Alex Yuandong Gu, Hyun Kee Chang
  • Patent number: 10203525
    Abstract: Techniques for increasing efficiency of thermo-optic phase shifters using multi-pass heaters and thermal bridges are provided. In one aspect, a thermo-optic phase shifter device includes: a plurality of optical waveguides formed in an SOI layer over a buried insulator; at least one heating element adjacent to the optical waveguides; and thermal bridges connecting at least one of the optical waveguides directly to the heating element. A method for forming a thermo-optic phase shifter device is also provided.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: February 12, 2019
    Assignee: International Business Machines Corporation
    Inventors: Douglas M. Gill, Chi Xiong
  • Patent number: 10205531
    Abstract: A distributed traveling-wave Mach-Zehnder modulator driver having a plurality of modulation stages that operate cooperatively (in-phase) to provide a signal suitable for use in a 100 Gb/s optical fiber transmitter at power levels that are compatible with conventional semiconductor devices and conventional semiconductor processing is described.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: February 12, 2019
    Assignee: Elenion Technologies, LLC
    Inventors: Ran Ding, Thomas Wetteland Baehr-Jones, Michael J. Hochberg, Alexander Rylyakov
  • Patent number: 10200130
    Abstract: An optical transmitter includes: a splitter; a first optical modulator and a second optical modulator that modulate each of light beams split by the splitter; a first semiconductor optical amplifier (SOA) and a second SOA that are connected to a subsequent stage of the first optical modulator and a subsequent stage of the second optical modulator, respectively; a first detector and a second detector that detect light output intensity of the first SOA and light output intensity of the second SOA, respectively; a controller that sets gains of the first and second SOAs such that the first and second SOAs are equal in the light output intensity based on detection values of the first and second detectors; and a combiner that combines an output light beam of the first SOA and an output light beam of the second SOA.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: February 5, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shusaku Hayashi, Satoshi Nishikawa, Koichi Akiyama, Eiji Yagyu
  • Patent number: 10197819
    Abstract: Techniques for increasing efficiency of thermo-optic phase shifters using multi-pass heaters and thermal bridges are provided. In one aspect, a thermo-optic phase shifter device includes: a plurality of optical waveguides formed in an SOI layer over a buried insulator; at least one heating element adjacent to the optical waveguides; and thermal bridges connecting at least one of the optical waveguides directly to the heating element. A method for forming a thermo-optic phase shifter device is also provided.
    Type: Grant
    Filed: December 29, 2017
    Date of Patent: February 5, 2019
    Assignee: International Business Machines Corporation
    Inventors: Douglas M. Gill, Chi Xiong
  • Patent number: 10194221
    Abstract: A high capacity node includes a plurality of receiver sections and a plurality of transmitter sections; and an electrical switching fabric between the plurality of receiver sections and the plurality of transmitter sections, wherein each of the plurality of receiver sections and the plurality of transmitter sections interface the electrical switching fabric at a full signal level and the electrical switching fabric is configured to perform flow switching on the full signal level between respective receiver sections and transmitter sections, and wherein the plurality of receiver sections, the plurality of transmitter sections, and one or more stages of the electrical switching fabric are implemented in one or more optoelectronic integrated circuits.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: January 29, 2019
    Assignee: Ciena Corporation
    Inventors: Michael Y. Frankel, John P. Mateosky, Michael H. Shahine, Joseph Berthold
  • Patent number: 10192857
    Abstract: According to an example of the present disclosure a direct bandgap (DBG) semiconductor structure is bonded to an assembly comprising a silicon photonics (SiP) wafer and a complementary metal-oxide-semiconductor (CMOS) wafer. The SiP wafer includes photonics circuitry and the CMOS wafer includes electronic circuitry. The direct bandgap (DBG) semiconductor structure is optically coupled to the photonics circuitry.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: January 29, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Marco Fiorentino, Di Liang, Geza Kurczveil, Raymond G Beausoleil
  • Patent number: 10187112
    Abstract: Various methods of detecting leakage of a signal from a Data-Over-Cable Service Interface Specification (DOCSIS) 3.1 channel are disclosed, including using a DOCSIS 3.1-defined “exclusion band” to insert existing tagger-based test carriers, using a power signature algorithm to detect the presence of DOCSIS 3.1-defined pilot carriers, and using a time-based correlation technique to detect the presence of DOCSIS 3.1-defined cyclic prefixes.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: January 22, 2019
    Assignee: Viavi Solutions, Inc.
    Inventors: Gary W. Sinde, Brett W. Emsley, Raleigh B. Stelle, IV, Mathew A. King
  • Patent number: 10187157
    Abstract: To provide an optical transmitter module with simplified control of a voltage to be applied to an optical modulator. An optical transmitter module includes a semiconductor laser for irradiating a laser beam; a demultiplexer for branching the laser beam to output branched light beams; optical modulators for modulating an optical amplitude of each of the branched light beams into a first optical amplitude or a second optical amplitude, depending on an input level at two levels; and a multiplexer for multiplexing output light beams from the optical modulators. The optical transmitter module may include optical waveguides for connecting the optical modulators and the multiplexer, and the optical waveguides may include a first optical waveguide for causing a first phase difference and a second optical waveguide for causing a second phase difference different from the first phase difference.
    Type: Grant
    Filed: February 27, 2017
    Date of Patent: January 22, 2019
    Assignee: Oclaro Japan, Inc.
    Inventor: Kouji Nakahara
  • Patent number: 10172002
    Abstract: A method and device for transmitting product information using ultrasonic signals are disclosed. The device detects local availability of ultrasound-encoded product information while the device is at a location in proximity to an ultrasound transmitter. In response to detecting the local availability of the ultrasound-encoded product information, the device requests a user permission from a user of the device to capture the ultrasound-encoded product information. Upon obtaining the user permission to capture the ultrasound-encoded product information, the device receives, from the ultrasound transmitter, an ultrasonic signal encoded with a message containing respective information associated with a respective product. The device decodes the ultrasonic signal to obtain the message in a human-perceivable form.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: January 1, 2019
    Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventor: Chang He
  • Patent number: 10168476
    Abstract: Disclosed herein are techniques, methods, structures and apparatus for providing photonic structures and integrated circuits with optical gratings disposed within cladding layer(s) of those structures and circuits.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: January 1, 2019
    Assignee: Acacia Communications, Inc.
    Inventors: Christopher Doerr, Diedrik Vermeulen