Phase Modulation Patents (Class 359/279)
  • Patent number: 11493602
    Abstract: A photonic, integrated circuit chip can have a frequency comb laser configured to generate a plurality of wavelengths, a plurality of modulators, one respective modulator for each wavelength of the plurality of wavelengths, the plurality of modulators being aligned in series with each of the plurality of modulators being tuned to a respective one of the wavelengths of the plurality of wavelengths, a connector configured to convey a drive signal for each modulator of the plurality of modulators, a semiconductor optical amplifier configured to receive light exiting from the plurality of modulators, and a chip having present thereon the frequency comb laser, the plurality of modulators, and the semiconductor optical amplifier. The plurality of modulators can be configured to produce a single beam of time-interleaved, multiple-wavelength output laser light. A mobile system, such as a satellite, can also have the photonic, integrated circuit chip as a component thereof.
    Type: Grant
    Filed: April 30, 2020
    Date of Patent: November 8, 2022
    Assignee: United States of America as represented by the Administrator of NASA
    Inventors: Guangning Yang, Jeffrey Chen
  • Patent number: 11418263
    Abstract: An optical full-field transmitter for an optical communications network includes a primary laser source configured to provide a narrow spectral linewidth for a primary laser signal, and a first intensity modulator in communication with a first amplitude data source. The first intensity modulator is configured to output a first amplitude-modulated optical signal from the laser signal. The transmitter further includes a first phase modulator in communication with a first phase data source and the first amplitude-modulated optical signal. The first phase modulator is configured to output a first two-stage full-field optical signal. The primary laser source has a structure based on a III-V compound semiconductor.
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: August 16, 2022
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Haipeng Zhang, Junwen Zhang, Mu Xu, Zhensheng Jia, Luis Alberto Campos
  • Patent number: 11362058
    Abstract: A bonding and indexing apparatus has a first index head to move a substrate in an indexing direction from a first position to a second position and a second index head to move the substrate in an indexing direction from the second position to a third position. The first and/or second index head has a bonding element to effect a bonding process between the substrate and an element disposed against the substrate so that bonding and movement in the indexing direction is implemented simultaneously by the first index head and/or bonding and movement in the indexing direction is implemented simultaneously by the second index head.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: June 14, 2022
    Assignee: Nexperia B.V.
    Inventors: Ralph Huybers, Hans Van De Rijdt
  • Patent number: 11327328
    Abstract: Described examples include a beam spreader having a first beam splitter arranged to receive light from a light source, the first beam splitter arranged to pass a first portion of the light in a first direction and reflect a second portion of the light; a second beam splitter arranged to receive the second portion of the light and reflect a third portion of the light in a second direction parallel to the first direction and arranged to pass a fourth portion of the light; and a mirror arranged to receive the fourth portion of the light and reflect the fourth portion of the light in a third direction parallel to the first direction, wherein the third portion and the fourth portion of the light reflected from the mirror is separated from the first portion of the light in the spreading direction.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: May 10, 2022
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Alexander Lyubarsky
  • Patent number: 11327326
    Abstract: The present disclosure discloses a real-time micro/nano optical field generation and manipulation system and method. The system comprises a light source, a spatial filtering unit, an optical 4F system and a light wave manipulation unit, and the optical 4F system comprises a first lens (set) and a second lens (set) sequentially arranged along a light path. The present disclosure achieves real-time modulation on an incident wavefront through a phase element or a phase element assemble. By dynamically manipulating an incident light sub-wavefront, or the light wave modulation optical element, or different areas of the optical element, or different parts of the optical field in an imaging plane and/or the like by the spatial filtering unit, real time light fields with different parameters are generated in the image plane of the system.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: May 10, 2022
    Assignee: Soochow University
    Inventors: Yan Ye, Yishen Xu, Linsen Chen
  • Patent number: 11327227
    Abstract: A multi-level semiconductor device, the device including: a first level including integrated circuits; a second level including a structure designed to conduct electromagnetic waves, where the second level is disposed above the first level, where the first level includes crystalline silicon; an oxide layer disposed between the first level and the second level; and a plurality of electromagnetic modulators, where the second level is bonded to the oxide layer, and where the bonded includes oxide to oxide bonds.
    Type: Grant
    Filed: October 3, 2021
    Date of Patent: May 10, 2022
    Assignee: Monolithic 3D Inc.
    Inventors: Zvi Or-Bach, Deepak C. Sekar, Brian Cronquist
  • Patent number: 11215851
    Abstract: An optical modulator uses an optoelectronic phase comparator configured to provide, in the form of an electrical signal, a measure of a phase difference between two optical waves. The phase comparator includes an optical directional coupler having two coupled channels respectively defining two optical inputs for receiving the two optical waves to be compared. Two photodiodes are configured to respectively receive the optical output powers of the two channels of the directional coupler. An electrical circuit is configured to supply, as a measure of the optical phase shift, an electrical signal proportional to the difference between the electrical signals produced by the two photodiodes.
    Type: Grant
    Filed: March 18, 2019
    Date of Patent: January 4, 2022
    Assignee: STMICROELECTRONICS SA
    Inventor: Jean-Robert Manouvrier
  • Patent number: 11163181
    Abstract: A method for generating a control signal, having at least one frequency component, for an acousto-optical element, from one frequency spectrum having the at least one frequency, or from multiple frequency spectra which together have the at least one frequency, includes the step of obtaining, from the one frequency spectrum or from the multiple frequency spectra, one transmit signal in the time domain in each case via an inverse Fourier transform. The one or the multiple transmit signals are modulated via a single-sideband modulation onto a carrier signal having a carrier frequency in order to obtain one modulated signal in each case. The control signal is obtained as a real part of the one modulated signal or as a consolidation of the real parts of the multiple modulated signals.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: November 2, 2021
    Assignee: LEICA MICROSYSTEMS CMS GMBH
    Inventors: Patric Mrawek, Thorsten Koester
  • Patent number: 11079520
    Abstract: In this disclosure, an optical component which comprises an array of metalenses is provided. Each metalens comprises a plurality of nanostructures and a dielectric layer and the nanostructures are disposed on the dielectric layer, and the nanostructures comprises an array of first phase compensation structures, and an array of second phase compensation structures. The array of the first phase compensation structures are disposed to surround the array of the second phase compensation structures so as to define a single metalens. The first and second phase compensation structures are complementary to each other and substantially satisfy the Babinet's principle.
    Type: Grant
    Filed: December 24, 2018
    Date of Patent: August 3, 2021
    Assignee: Academia Sinica
    Inventors: Din-Ping Tsai, Pin-Chieh Wu
  • Patent number: 11054674
    Abstract: A modulator. In some embodiments, the modulator includes a portion of an optical waveguide, the waveguide including a rib extending upwards from a surrounding slab. The rib may have a first sidewall, and a second sidewall parallel to the first sidewall. The rib may include a first region of a first conductivity type, and a second region of a second conductivity type different from the first conductivity type. The second region may have a first portion parallel to and extending to the first sidewall, and a second portion parallel to the second sidewall. The first region may extend between the first portion of the second region and the second portion of the second region.
    Type: Grant
    Filed: April 24, 2019
    Date of Patent: July 6, 2021
    Assignee: Rockley Photonics Limited
    Inventors: Dong Yoon Oh, David Arlo Nelson, Pradeep Srinivasan, Amit Singh Nagra, Aaron John Zilkie, Jeffrey Driscoll, Aaron L. Birkbeck
  • Patent number: 10935797
    Abstract: A head-mounted display (HMD) includes a multifocal block having one or more possible focal distances and includes a multifocal structure. The multifocal structure has a first focal distance and a second focal distance of the one or more possible focal distances. The multifocal structure includes one or more optical components positioned in series such that light from an electronic display is received and passes through each of the one or more optical components at least once before being output from the multifocal structure. The one or more optical components includes a switchable half waveplate (SHWP). The SHWP has a first state that causes the multifocal structure to output image light at the first focal distance, and a second state that causes the multifocal structure to output the image light at the first focal distance.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: March 2, 2021
    Assignee: Facebook Technologies, LLC
    Inventors: Yusufu Njoni Bamaxam Sulai, Nicholas Daniel Trail, Wai Sze Tiffany Lam
  • Patent number: 10921618
    Abstract: An optical modulating device may include a plurality of quantum dot (QD)-containing layers having QDs and a plurality of refractive index change layers. The QD-containing layers may be disposed between the refractive index change layers, respectively. The optical modulating device may be configured to modulate light-emission characteristics of the plurality of QD-containing layers. At least two of the QD-containing layers may have different central emission wavelengths. At least two of the plurality of refractive index change layers may include different materials or have different carrier densities.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: February 16, 2021
    Assignees: SAMSUNG ELECTRONICS CO., LTD., CALIFORNIA INSTITUTE OF TECHNOLOGY
    Inventors: Duhyun Lee, Ruzan Sokhoyan, Yu-Jung Lu, Ghazaleh Kafaie Shirmanesh, Harry Atwater, Ragip Pala, Chanwook Baik
  • Patent number: 10921620
    Abstract: An optical modulator includes an optical modulation element (102) including a plurality of signal electrodes (112a and the like), a plurality of lead pins (116a and the like) for inputting high frequency signals, and a relay substrate (118) in which conductor patterns (202a and the like) that electrically connect the lead pins and the signal electrodes are formed, and at least one of the conductor patterns in the optical modulator is constituted so that at least one resonant frequency of the at least one of the conductor patterns is different from at least one resonant frequency of at least one of the other conductor patterns.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: February 16, 2021
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Toru Sugamata, Norikazu Miyazaki
  • Patent number: 10908021
    Abstract: A spectroscopic device and the like that are capable of fast spectral dispersion are provided. The spectroscopic device includes: a modulation unit for converting wavefront shapes of light according to wavelengths; and a demodulation unit for changing a phase of light of a selected wavelength within the light whose wavefront shapes have been converted, in such a way that the light changes into a predetermined state.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: February 2, 2021
    Assignee: NEC CORPORATION
    Inventors: Chenhui Huang, Masahiro Tanomura
  • Patent number: 10901153
    Abstract: In Mach-Zehnder interferometer (MZI) based modulators (MZM) input laser light comes in from one side, gets split into two MZI arms, then recombined at an opposite side. Each MZI arm may be phase or intensity modulated depending on the set phase offset, whereby coherent or intensity modulation may be performed which can later be de-coded by a receiver. Ring resonator type modulators (RRM) are compact; however, their phase response is nonlinear, normally limiting their application in coherent phase modulation. However, a combined MZI RRM overcomes the shortcomings of the prior art by providing a novel structure and driving scheme for use with semiconductor photonics that takes advantage of the compactness of ring modulators and the linearity of MZI by setting the ring resonators to resonate at the input laser light wavelength.
    Type: Grant
    Filed: December 24, 2018
    Date of Patent: January 26, 2021
    Assignee: Elenion Technologies, LLC
    Inventors: Yangjin Ma, Alexandre Horth, Matthew Streshinsky, Ruizi Shi, Rafeed Sukkar, Richard Younce, Michael J. Hochberg
  • Patent number: 10742324
    Abstract: A semiconductor-based Mach-Zehnder modulator (MZM) is configured for push-pull bias dithering to control the MZM bias at a desired set point. When two such MZM modulators are connected in parallel to form an IQ modulator, bias settings for both MZMs and the IQ bias may be controlled from an output of the IQ modulator to minimize both the IQ offset and the quadrature error of the output signal constellation even for non-ideal MZMs with low extinction ratios.
    Type: Grant
    Filed: May 21, 2019
    Date of Patent: August 11, 2020
    Assignee: Elenion Technologies, LLC
    Inventors: Kishore Padmaraju, Ruizhi Shi, Yangjin Ma, Matthew Streshinsky
  • Patent number: 10641959
    Abstract: An optical device comprises first, second and third elements fabricated on a common substrate. The first element comprises an active waveguide structure supporting a first optical mode, the second element comprises a passive waveguide structure, characterized by a planar top surface, supporting a second optical mode, and the third element, at least partly butt-coupled to the first element, comprises an intermediate waveguide structure. If the first optical mode differs from the second optical mode by more than a predetermined amount, a tapered waveguide structure in at least one of the second and third elements facilitates efficient adiabatic transformation between the first optical mode and the second optical mode. Mutual alignments of the first, second and third elements are defined using lithographic alignment marks that facilitate precise alignment between layers formed during processing steps of fabricating the first, second and third elements.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: May 5, 2020
    Inventor: Hyundai Park
  • Patent number: 10621936
    Abstract: In an apparatus for modulating light, a spatial light modulator includes a plurality of pixels and configured to modulate input light in response to a drive voltage for each of the pixels. An input value setting unit is configured to set an input value for the each of pixels. The input value is a digital value, an entire gray level of the digital value is “N”, and “N” is a natural number. A converting unit is configured to convert the input value to a control value. A control value is a digital value, an entire gray level of the control value is “M”, and “M” is a natural number greater than “N”. A driving unit is configured to convert the control value to a voltage value and drive the each of the pixels in response to the drive voltage corresponding to the voltage value.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: April 14, 2020
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Naoya Matsumoto, Takashi Inoue, Norihiro Fukuchi, Yuji Kobayashi, Tsutomu Hara
  • Patent number: 10591870
    Abstract: Techniques to improve image quality in holography utilizing lenses made from materials with non-quantized anisotropic electromagnetic properties, such as birefringent materials, to advantageously split an incoming beam of light into two coincident beams with different focal lengths that interfere with one another and thus create holograms free of electro-optical or pixelated devices are disclosed for microscopy and other applications. The use of thin birefringent lenses and single crystal alpha-BBO lenses are introduced. Corresponding systems, methods and apparatuses are described.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: March 17, 2020
    Assignee: CellOptic, Inc.
    Inventors: Gary Brooker, Nisan Siegel
  • Patent number: 10585187
    Abstract: A vehicular radar system includes an optical source designed to output an optical signal. The vehicular radar system further includes a first optical splitter coupled to the optical source and designed to split the optical signal into a first duplicate signal and a second duplicate signal. The vehicular radar system further includes at least one converter coupled to the first optical splitter and designed to convert the first duplicate signal and the second duplicate signal into a first radar signal and a second radar signal, respectively. The vehicular radar system further includes a first antenna coupled to the at least one converter and designed to transmit the first radar signal, and a second antenna coupled to the at least one converter and designed to transmit the second radar signal.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: March 10, 2020
    Assignee: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.
    Inventor: Jae Seung Lee
  • Patent number: 10495887
    Abstract: A head-mounted display (HMD) includes a multifocal block having one or more possible focal distances and includes a multifocal structure. The multifocal structure has a first focal distance and a second focal distance of the one or more possible focal distances. The multifocal structure includes one or more optical components positioned in series such that light from an electronic display is received and passes through each of the one or more optical components at least once before being output from the multifocal structure. The one or more optical components includes a switchable half waveplate (SHWP). The SHWP has a first state that causes the multifocal structure to output image light at the first focal distance, and a second state that causes the multifocal structure to output the image light at the first focal distance.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: December 3, 2019
    Assignee: Facebook Technologies, LLC
    Inventors: Yusufu Njoni Bamaxam Sulai, Nicholas Daniel Trail, Wai Sze Tiffany Lam
  • Patent number: 10338416
    Abstract: Coupling modulation of an optical resonator employs a variable modal index to provide modulation of optical signal coupling. A coupling-modulated optical resonator includes an optical resonator having a coupled portion and a bus waveguide having a modulation section adjacent to and coextensive with and separated by a gap from the coupled portion. The modulation section is to modulate coupling of an optical signal between the optical resonator and the bus waveguide according to a variable difference between a modal index of the bus waveguide modulation section and a modal index of the optical resonator coupled portion.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: July 2, 2019
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Di Liang, David A. Fattal
  • Patent number: 10295812
    Abstract: A light irradiation device is an apparatus for irradiating an irradiation object, and includes a light source outputting readout light L1, a spatial light modulator modulating the readout light L1 in phase to output modulated light L2, and a both-sided telecentric optical system including a first lens optically coupled to a phase modulation plane of the spatial light modulator and a second lens optically coupled between the first lens and the irradiation object, and optically coupling the phase modulation plane and the irradiation object. An optical distance between the phase modulation plane and the first lens is substantially equal to a focal length of the first lens. The spatial light modulator displays a Fresnel type kinoform on the phase modulation plane.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: May 21, 2019
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventor: Yuu Takiguchi
  • Patent number: 10284302
    Abstract: An optical transmitter includes an optical modulator that includes a first phase shifter for a most significant bit, a second phase shifter for a least significant bit, and a third phase shifter for fine adjustment, the first phase shifter, the second phase shifter, and the third phase shifter are disposed along an optical waveguide, and a drive circuit that includes a first driver that drives the first phase shifter, a second driver that drives the second phase shifter, and a third driver that drives the third phase shifter, wherein a drive polarity of the third driver is adjustable in a positive direction and a negative direction, and the third phase shifter adjusts an amount of phase change of the optical modulator in a positive direction or a negative direction based on a drive voltage inputted from the third driver.
    Type: Grant
    Filed: May 23, 2018
    Date of Patent: May 7, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Shigeki Kawaai, Yoshiharu Yoshizawa, Manabu Yamazaki, Daisuke Usui
  • Patent number: 10263073
    Abstract: A gate-all-around field effect transistor (GAA FET) includes an InAs nano-wire as a channel layer, a gate dielectric layer wrapping the InAs nano-wire, and a gate electrode metal layer formed on the gate dielectric layer. The InAs nano-wire has first to fourth major surfaces three convex-rounded corner surfaces and one concave-rounded corner surface.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: April 16, 2019
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
    Inventors: Mark Van Dal, Gerben Doornbos, Matthias Passlack, Martin Christopher Holland
  • Patent number: 10241326
    Abstract: Devices, systems and techniques are provided for adaptive transformation of wavefronts of optical waves or other electromagnetic waves to either correct the undesirable aberration or provide desirable wavefronts or aberrations for various applications, including imaging, sensing, signaling and other applications.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: March 26, 2019
    Assignee: C URCHIN TECHNOLOGIES LLC
    Inventor: Feiling Wang
  • Patent number: 10244297
    Abstract: Described are various configurations of reduced crosstalk optical switches. Various embodiments can reduce or entirely eliminate crosstalk using a coupler that has a power-splitting ratio that compensates for amplitude imbalance caused by phase modulator attenuation. Some embodiments implement a plurality of phase modulators and couplers as part of a dilated switch network to increase overall bandwidth and further reduce potential for crosstalk.
    Type: Grant
    Filed: March 14, 2018
    Date of Patent: March 26, 2019
    Assignee: Juniper Networks, Inc.
    Inventor: Jonathan Edgar Roth
  • Patent number: 10234668
    Abstract: Provided is a microscope system including: a galvanometer scanner that scans laser light on a sample; an observation optical system that acquires an image of the sample on which the laser light is scanned by the galvanometer scanner; an ROI setting portion that sets a region-of-note, which is an area of note in the sample, so as to serve as an observation ROI in the image acquired by the observation optical system; an amount-of-rotation calculating portion that calculates an amount by which the observation ROI is rotated about the Z-axis in the image in association with rotation of the region-of-note about the Z-axis; and a control portion that controls the galvanometer scanner so that the direction in which the laser light is scanned in the region-of-note is made steady on the basis of the amount by which the observation ROI is rotated about the Z-axis.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: March 19, 2019
    Assignee: OLYMPUS CORPORATION
    Inventor: Toshiyuki Hattori
  • Patent number: 10216059
    Abstract: An optoelectronic device and method of making the same. In some embodiments, the optoelectronic device includes a substrate, a Mach-Zehnder waveguide modulator, and an epitaxial crystalline cladding layer. The Mach-Zehnder waveguide modulator includes a left arm including a left SiGe optical waveguide, and a right arm including a right SiGe optical waveguide, each of the left and right optical waveguides including a junction region and a plurality of electrodes for providing a bias across the junction to enable control of the phase of light travelling through the junction regions via dispersion. The epitaxial crystalline cladding layer is on top of the substrate and beneath the junction region of the left optical waveguide and/or the junction region of the right optical waveguide, and has a refractive index which is less than a refractive index of the respective junction region(s), such that optical power is confined to the respective junction region(s).
    Type: Grant
    Filed: March 21, 2018
    Date of Patent: February 26, 2019
    Assignee: Rockley Photonics Limited
    Inventors: Guomin Yu, Aaron John Zilkie, Hooman Abediasl, Damiana Lerose, Amit Singh Nagra, Pradeep Srinivasan, Haydn Frederick Jones
  • Patent number: 10200143
    Abstract: A transmitter comprising a plurality of modulator and multiplexer (Mod-MUX) units, each Mod-MUX unit operating at an optical wavelength different from the other Mod-MUX units. The transmitter can additional include in each Mod-MUX unit two optical taps and three photodetectors that are configured to allow the respective Mod-MUX unit to be tuned to achieve thermal stabilization and achieve effective modulation and WDM operation across a range of temperatures. The Mod-MUX transmitter avoids the use of a frequency comb. The Mod-MUX transmitter avoids cross-modulation between different modulators for different laser signals.
    Type: Grant
    Filed: March 9, 2018
    Date of Patent: February 5, 2019
    Assignee: Elenion Technologies, LLC
    Inventors: Thomas Baehr-Jones, Yang Liu, Ran Ding
  • Patent number: 10185165
    Abstract: Object To provide an optical waveguide device capable of suppressing an excess optical loss at a low level. Means An optical waveguide device including a substrate having an electro-optic effect, an optical waveguide 1 formed on the substrate, and a control electrode having a signal electrode 2 and ground electrodes 3 and 4 for controlling light waves that propagate through the optical waveguide, in which the signal electrode 2 has, in an intersection portion in which the signal electrode 2 is disposed on the optical waveguide 1, a narrow portion at which a width of the signal electrode 2 is narrower than those of portions before and after the intersection portion.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: January 22, 2019
    Assignee: SUMITOMO OSAKA CEMENT CO., LTD.
    Inventors: Youichi Hosokawa, Norikazu Miyazaki
  • Patent number: 10146040
    Abstract: A microscope (10) is described, having an aperture limiter (12), arranged in the beam path (22), for generating at least one optical channel (16; 18; 20). The aperture limiter (12) is embodied to set the aperture of the at least one optical channel (16; 18; 20). The aperture limiter (12) is furthermore embodied in such a way that in a first operating mode a first optical channel, and in a second operating mode at least one second optical channel, is selectively generable. The aperture limiter is also arranged in the pupil plane of the beam path.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: December 4, 2018
    Assignee: Leica Microsystems (Schweiz) AG
    Inventors: Harald Schnitzler, Reto Zuest
  • Patent number: 10069533
    Abstract: In one example embodiment, a method includes determining a first set of first lines and a second set of second lines in a system, obtaining input signals to be transmitted over the first set of first lines and the second set of second lines, determining a vectoring matrix, processing, within the first set, the incoming signals for the first lines in parallel based on the vectoring matrix, processing, within the second set, the input signals for the second lines in parallel based on the vectoring matrix and processing the first set and the second set sequentially based on the vectoring matrix, the processing the second set being based on at least a portion of the processing the incoming signals for the first lines.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: September 4, 2018
    Assignee: Nokia of America Corporation
    Inventor: Carl J. Nuzman
  • Patent number: 10048519
    Abstract: A driver configuration for driving a Mach-Zehnder modulator (MZM) includes a first driver supplied by a first voltage and a second voltage and configured to provide a first two complimentary outputs respectively to a first N-electrode of a first branch of the MZM and a second N-electrode of a second branch of the MZM. Additionally, the driver configuration includes a second driver supplied by a third voltage and a fourth voltage and configured to provide a second two complimentary outputs respectively to a first P-electrode of the first branch and a second P-electrode of the second branch. The driver configuration sets a difference between the third voltage and the fourth voltage equal to a difference between the first voltage and the second voltage to provide a same peak-to-peak differential swing for modulating light wave through each transmission line and output a modulated light with twice of the peak-to-peak differential swing.
    Type: Grant
    Filed: March 1, 2018
    Date of Patent: August 14, 2018
    Assignee: INPHI CORPORATION
    Inventors: Abdellatif El-Moznine, Bruno Tourette, Hessam Mohajeri
  • Patent number: 10044443
    Abstract: Described are various embodiments of a dual optical modulator, system and method. In one embodiment, an optical modulator modulates an input optical signal having a designated optical frequency. The modulator comprises first and second tunable modulators operable around the optical frequency and operatively disposed between a bus waveguide path and an opposed waveguide path. The modulator further comprises a relative optical phase-shifter optically coupled between the tunable modulators so to impart a relative optical phase shift between the bus waveguide path and the opposed waveguide path. The tunable modulators are respectively driveable to modulate a respective resonance thereof in complimentary directions relative to the optical frequency and thereby resonantly redirect a selectable portion of the input optical signal along the opposed waveguide path such that the relative optical phase shift is imparted thereto for output.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: August 7, 2018
    Assignee: Elenion Technologies, LLC
    Inventors: Thomas Wetteland Baehr-Jones, Michael J. Hochberg, Yang Liu
  • Patent number: 10031230
    Abstract: In a method for optically measuring the properties of at least one measurement path (I1, I2) between a transmitter (H) and a receiver (D), the receiver (D) receives an optical signal from a compensation transmitter (K) in addition to an optical signal from the transmitter (H). The signal of the transmitter (H) is reflected by an object (O) or is transmitted to the receiver (D) by means of said object in a different manner. The output signal (SO) of the receiver (D) is fed to a controller (CT), which changes the transmitter feed signal (S5) and/or compensation feed signal (S3) in accordance with a control algorithm. In the process, the controller (CT) determines two signals or values, which represent control parameters (S4a, S4?) for magnitude and phase or magnitude and delay.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: July 24, 2018
    Assignee: Mechaless Systems GMBH
    Inventor: Uwe Hendrik Hill
  • Patent number: 9941990
    Abstract: A transmitter comprising a plurality of modulator and multiplexer (Mod-MUX) units, each Mod-MUX unit operating at an optical wavelength different from the other Mod-MUX units. The transmitter can additional include in each Mod-MUX unit two optical taps and three photodetectors that are configured to allow the respective Mod-MUX unit to be tuned to achieve thermal stabilization and achieve effective modulation and WDM operation across a range of temperatures. The Mod-MUX transmitter avoids the use of a frequency comb. The Mod-MUX transmitter avoids cross-modulation between different modulators for different laser signals.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: April 10, 2018
    Assignee: Elenion Technologies, LLC
    Inventors: Thomas Baehr-Jones, Yang Liu, Ran Ding
  • Patent number: 9939667
    Abstract: A driver configuration for driving a Mach-Zehnder modulator (MZM) includes a first driver supplied by a first voltage and a second voltage and configured to provide a first two complimentary outputs respectively to a first N-electrode of a first branch of the MZM and a second N-electrode of a second branch of the MZM. Additionally, the driver configuration includes a second driver supplied by a third voltage and a fourth voltage and configured to provide a second two complimentary outputs respectively to a first P-electrode of the first branch and a second P-electrode of the second branch. The driver configuration sets a difference between the third voltage and the fourth voltage equal to a difference between the first voltage and the second voltage to provide a same peak-to-peak differential swing for modulating light wave through each transmission line and output a modulated light with twice of the peak-to-peak differential swing.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: April 10, 2018
    Assignee: INPHI CORPORATION
    Inventors: Abdellatif El-Moznine, Bruno Tourette, Hessam Mohajeri
  • Patent number: 9864148
    Abstract: An optical device includes at least three optical ports. An optical arrangement arranges an optical beam received from any of the optical ports into a first polarization state. A dispersion element spatially separates the optical beam into a plurality of wavelength components. An optical power element converges each wavelength component in at least one direction. A programmable optical phase modulator steers the wavelength components through the optical arrangement, the dispersion element and the focusing element to a selected optical output. The programmable optical phase modulator includes an active area that performs the steering and a non-active area surrounding the active area. A polarizing arrangement located in an optical path between at least one of the optical ports and at least a portion of the non-active area of the programmable optical phase modulator is configured to arrange optical energy into a second polarization state orthogonal to the first polarization state.
    Type: Grant
    Filed: January 6, 2017
    Date of Patent: January 9, 2018
    Assignee: Nistica, Inc.
    Inventor: Takaaki Ishikawa
  • Patent number: 9774163
    Abstract: Variable repetition rate and wavelength optical pulse source, comprising a fixed or variable repetition rate source of supercontinuum pulses; a wavelength tunable optical bandpass filter to filter the supercontinuum pulses at two or more wavelengths, wherein said source of supercontinuum pulses and said wavelength tunable optical bandpass filter are configured such that the optical pulse source can provide variable repetition rate and variable wavelength optical pulses including a series of repetition rates with selected wavelength-varying pulse trains.
    Type: Grant
    Filed: March 10, 2013
    Date of Patent: September 26, 2017
    Assignee: NKT Photonics A/S
    Inventors: John Redvers Clowes, Anatoly Borisovich Grudinin, Ian Michael Godfrey
  • Patent number: 9739992
    Abstract: A light irradiation device is an apparatus for irradiating an irradiation object, and includes a light source outputting readout light L1, a spatial light modulator modulating the readout light L1 in phase to output modulated light L2, and a both-sided telecentric optical system including a first lens optically coupled to a phase modulation plane of the spatial light modulator and a second lens optically coupled between the first lens and the irradiation object, and optically coupling the phase modulation plane and the irradiation object. An optical distance between the phase modulation plane and the first lens is substantially equal to a focal length of the first lens. The spatial light modulator displays a Fresnel type kinoform on the phase modulation plane.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: August 22, 2017
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventor: Yuu Takiguchi
  • Patent number: 9716869
    Abstract: An image display apparatus according to an embodiment of the present technology includes a light source section, one or more reflection type light modulators, an optical system, and a light shielding plate. The light source section includes at least one or more laser light sources. The one or more reflection type light modulators modulate and reflect incident light. The optical system splits light from the light source section into a plurality of split light beams, superimposes the plurality of split light beams on the one or more reflection type light modulators, and causes them to enter. The light shielding plate is provided in the optical system and includes an aperture provided on a path of each of the plurality of split light beams and a light shielding portion that shields reflection light from the reflection type light modulator to the light source section.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: July 25, 2017
    Assignee: SONY CORPORATION
    Inventors: Jyunpei Nakajima, Koji Kita
  • Patent number: 9548816
    Abstract: Method and devices of controlling wavelengths in two-channel DEMUX/MUX in silicon photonics are provided. The two-channel DEMUX/MUX includes a waveguide-based delay-line-interferometer at least in receiver portion of a two-channel transceiver for DWDM optical transmission loop and is configured to split a light wave with combined two-wavelengths into one light wave with locked one channel wavelength and another light wave with locked another channel wavelength. The waveguide-based delayed-line interferometer (DLI) is characterized by a free-spectral-range configured to be equal to twice of channel spacing. The method includes tuning heater of DLI in receiver of each two-channel transceiver by using either low-frequency dither signals added on MZMs associated with respective two channels as feedback signal or one DFB laser wavelength tapped from an input of transmitter portion at one channel before or after the MZMs as a direct wavelength reference to feed into an output of receiver portion at another channel.
    Type: Grant
    Filed: March 21, 2016
    Date of Patent: January 17, 2017
    Assignee: INPHI CORPORATION
    Inventor: Masaki Kato
  • Patent number: 9442295
    Abstract: A beam shaping device includes a first phase modulation unit including a phase-modulation type SLM, and displaying a first phase pattern for modulating a phase of input light, a second phase modulation unit including a phase-modulation type SLM, being optically coupled to the first phase modulation unit, and displaying a second phase pattern for further modulating a phase of light phase-modulated by the first phase modulation unit, and a control unit providing the first and second phase patterns to the first and second phase modulation units, respectively. The first and second phase patterns are phase patterns for approximating an intensity distribution and a phase distribution of light output from the second phase modulation unit, to predetermined distributions.
    Type: Grant
    Filed: April 18, 2013
    Date of Patent: September 13, 2016
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Naoya Matsumoto, Takashi Inoue, Yuu Takiguchi
  • Patent number: 9425919
    Abstract: A transmitter comprising a plurality of modulator and multiplexer (Mod-MUX) units, each Mod-MUX unit operating at an optical wavelength different from the other Mod-MUX units. The transmitter can additional include in each Mod-MUX unit two optical taps and three photodetectors that are configured to allow the respective Mod-MUX unit to be tuned to achieve thermal stabilization and achieve effective modulation and WDM operation across a range of temperatures. The Mod-MUX transmitter avoids the use of a frequency comb. The Mod-MUX transmitter avoids cross-modulation between different modulators for different laser signals.
    Type: Grant
    Filed: October 15, 2014
    Date of Patent: August 23, 2016
    Assignee: Coriant Advanced Technology, LLC
    Inventors: Thomas Baehr-Jones, Yang Liu, Ran Ding, Michael J. Hochberg
  • Patent number: 9406865
    Abstract: A resonator is described. The resonator includes multiple electrodes. The resonator also includes a composite piezoelectric material. The composite piezoelectric material includes at least one layer of a first piezoelectric material and at least one layer of a second piezoelectric material. At least one electrode is coupled to a bottom of the composite piezoelectric material. At least one electrode is coupled to a top of the composite piezoelectric material.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: August 2, 2016
    Assignee: QUALCOMM Incorporated
    Inventors: Chengjie Zuo, Changhan Hobie Yun, Jonghae Kim
  • Patent number: 9341870
    Abstract: An optical device includes an optical port array, a first walk-off crystal, a first half-wave plate, a second walk-off crystal and a segmented half-wave plate. The optical port array has a first and second plurality of ports for receiving optical beams. The first walk-off crystal spatially separates the beams into first and second portions that are in first and second orthogonal polarization states, respectively. The first portions are walked-off by the first walk-off crystal and the second portions pass therethrough without being walked-off. The first half-wave plate rotates the polarization state of the first and second portions of the optical beams. The second walk-off crystal is oriented in an opposite direction from the first walk-off crystal such that the second portions are walked-off by the second walk-off crystal and the first portions pass therethrough without being walked-off. The segmented half-wave plate receives the first or second portions of the beams.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: May 17, 2016
    Assignee: Nistica, Inc.
    Inventors: Jefferson L. Wagener, Mitchell E. Haller
  • Patent number: 9223159
    Abstract: A spatial light modulation device includes a phase-modulation type spatial light modulator, a temperature sensor detecting a temperature of the spatial light modulator, and a control unit providing a drive signal to the spatial light modulator. The control unit has a storage unit. The storage unit stores N correction patterns created so as to correspond to N (N is an integer not less than 2) temperature values of the spatial light modulator in order to correct phase distortion of the spatial light modulator. The control unit selects one correction pattern according to a temperature value of the spatial light modulator, and generates the drive signal based on a phase pattern created by adding the one correction pattern to a desired phase pattern. Thereby, it becomes possible to suppress phase distortion according to a temperature change while suppressing a delay in operation.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: December 29, 2015
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Yuu Takiguchi, Naoya Matsumoto, Tomoko Otsu
  • Patent number: 9209382
    Abstract: A piezo electrical component has a stack of piezo electrical layers arranged over each other and electrode layers arranged therebetween. The stack has at least one first piezo electrical layer having a first piezo electrical charge constant and, directly adjacent thereto, at least one second piezo electrical layer having a second piezo electrical charge constant. The piezo electrical charge constant describes an expansion of the piezo electrical layer perpendicular to an electrical field at a voltage 6 applied to the electrode layers. The first piezo electrical charge constant is different from the second piezo electrical charge constant.
    Type: Grant
    Filed: January 26, 2011
    Date of Patent: December 8, 2015
    Assignee: EPCOS AG
    Inventors: Alexander Glazunov, Oliver Dernovsek
  • Patent number: RE46664
    Abstract: Laser lit flat panel displays are disclosed including edge-lit and direct lit backlights. In certain embodiments, laser assemblies are selected to obtain bandwidth distributions to reduce speckle.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: January 9, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Masayuki Karakawa