Particular Coupling Function Patents (Class 385/27)
  • Patent number: 10833472
    Abstract: An apparatus and method for calculating the frequency of the light.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: November 10, 2020
    Assignee: Acacia Communications, Inc.
    Inventors: Long Chen, Christopher Doerr
  • Patent number: 10740493
    Abstract: An improved waveguide is disclosed. The waveguide utilizes a luminescent material disposed within or around its perimeter to introduce additional light into the waveguide. For example, the waveguide may include a plurality of planar layers having different refractive indexes. A luminescent material may be disposed along the outer edge of these layers. When light from within the waveguide strikes the luminescent material, it emits light, thereby adding to the light in the waveguide. Not only does the luminescent material introduce more light into the waveguide, it also introduces more light sources, thereby making it more difficult to introduce a probe without blocking at least a portion of the light destined for the image sensor. The luminescent material may be a phosphor.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: August 11, 2020
    Assignee: Massachusetts Institute of Technology
    Inventors: Michael W. Geis, Joshua Kramer, Karen M.G.V. Gettings, Marc J. Burke, Mankuan M. Vai, Theodore M. Lyszczarz
  • Patent number: 10721634
    Abstract: A system, in an active reflector device, adjusts a first amplification gain of each of a plurality of radio frequency (RF) signals received at a receiver front-end from a first equipment via a first radio path of an NLOS radio path. A first phase shift is performed on each of the plurality of RF signals with the adjusted first amplification gain. A combination of the plurality of first phase-shifted RF signals is split at a transmitter front-end. A second phase shift on each of the split first plurality of first phase-shifted RF signals is performed. A second amplification gain of each of the plurality of second phase-shifted RF signals is adjusted.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: July 21, 2020
    Assignee: MOVANDI CORPORATION
    Inventors: Ahmadreza Rofougaran, Sam Gharavi, Kartik Sridharan, Michael Boers, Seunghwan Yoon, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Patent number: 10687221
    Abstract: A system, in an active reflector device, adjusts a first amplification gain of each of a plurality of radio frequency (RF) signals received at a receiver front-end from a first equipment via a first radio path of an NLOS radio path. A first phase shift is performed on each of the plurality of RF signals with the adjusted first amplification gain. A combination of the plurality of first phase-shifted RF signals is split at a transmitter front-end. A second phase shift on each of the split first plurality of first phase-shifted RF signals is performed. A second amplification gain of each of the plurality of second phase-shifted RF signals is adjusted.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: June 16, 2020
    Assignee: MOVANDI CORPORATION
    Inventors: Ahmadreza Rofougaran, Sam Gharavi, Kartik Sridharan, Michael Boers, Seunghwan Yoon, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Patent number: 10652758
    Abstract: A system, in an active reflector device, adjusts a first amplification gain of each of a plurality of radio frequency (RF) signals received at a receiver front-end from a first equipment via a first radio path of an NLOS radio path. A first phase shift is performed on each of the plurality of RF signals with the adjusted first amplification gain. A combination of the plurality of first phase-shifted RF signals is split at a transmitter front-end. A second phase shift on each of the split first plurality of first phase-shifted RF signals is performed. A second amplification gain of each of the plurality of second phase-shifted RF signals is adjusted.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: May 12, 2020
    Assignee: MOVANDI CORPORATION
    Inventors: Ahmadreza Rofougaran, Sam Gharavi, Kartik Sridharan, Michael Boers, Seunghwan Yoon, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Patent number: 10641964
    Abstract: A system for continuously phase tuning an optical signal includes one optical switch coupled to a phase modulator having a first waveguide with a first phase shifter and a second waveguide with a second phase shifter. The optical switch alternately switches between the first and second phase shifters to phase shift the optical signal, respectively. The continuously phase tuning system further includes a loop mirror that alternately receives the phase shifted optical signal from the first and second waveguides in accordance with the switching, via corresponding first and second mirror inputs, respectively, and reflects the phase shifted optical signal back to the same first or second mirror input at which the phase shifted optical signal was received. First and second phase values of the first and second phase shifters are determined such that overall phase change continues to accumulate substantially linearly.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: May 5, 2020
    Assignee: Keysight Technologies, Inc.
    Inventor: Bernd Nebendahl
  • Patent number: 10641974
    Abstract: Provided a two-dimensional photonic crystal device in which are inserted three waveguides and one resonant cavity by the creation of linear and local defects. Due to the photonic band gap related to the photonic crystal, electromagnetic signals are confined to the interior of waveguides and resonant cavity. By exciting dipole modes in the resonant cavity, with orientation that depends on the intensity of the applied DC magnetic field, the present circulator device can provide the nonreciprocal transmission of signals in the clockwise and counterclockwise directions. It can fulfill the isolation function and it is fork-shaped, providing greater flexibility in the design of integrated optical communication systems.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: May 5, 2020
    Assignee: UNIVERSIDADE FEDERAL DO PARÁ
    Inventors: Victor Dmitriev, Leno Rodrigues Martins, Gianni Masaki Tanaka Portela
  • Patent number: 10627284
    Abstract: There is provided a method for manufacturing an optical-fibre sensor device, including an enclosure defining a cavity and an optical-fibre sensor including an optical-fibre and a device for holding the sensor rigidly connected to the optical fibre, the optical fibre passing through the holding device between two attachment points. The method comprises: positioning the optical-fibre sensor in the enclosure to pass the fibre through two passage openings provided on the enclosure, which defines two optical-fibre portions in the enclosure, on either side of the holding device, each fibre portion extending between one of the attachment points and one of the passage openings; holding the optical-fibre sensor in position; performing a differential elongation of the enclosure relative to the optical-fibre sensor in the longitudinal direction and towards the outside of the enclosure, the optical-fibre sensor remaining held in position; attaching the optical fibre to the enclosure at the passage openings.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: April 21, 2020
    Assignee: THALES
    Inventors: François-Xavier Launay, Raphael Lardat, Gérard Roux
  • Patent number: 10520789
    Abstract: Apparatus for generating ultraviolet (UV) pulsed laser-radiation for material-processing includes a laser-source providing infrared (IR) pulsed laser-radiation and a frequency-conversion module. A lithium tetraborate (Li2B4O7) crystal located within the frequency-conversion module converts the IR pulsed laser-radiation to UV pulsed laser-radiation by non-linear harmonic generation. The frequency-conversion module is an airtight enclosure that may be evacuated or contain a dry gas. A flexible optical fiber-assembly transports the IR pulsed laser-radiation from the laser-source to the frequency-conversion module.
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: December 31, 2019
    Assignee: COHERENT KAISERSLAUTERN GMBH
    Inventor: Ralf Knappe
  • Patent number: 10418782
    Abstract: A wavelength-selectable laser device providing spatially-selectable wavelength(s) may be used to select one or more wavelengths for lasing in a tunable transmitter or transceiver, for example, in a wavelength division multiplexed (WDM) optical system such as a WDM passive optical network (PON). The wavelength-selectable laser device uses a dispersive optical element, such as a diffraction grating, to disperse light emitted from a laser emitter and to direct different wavelengths of the light toward a reflector at different spatial positions such that the wavelengths may be selected by allowing light to be reflected from selected spatial position(s) back into the laser emitter. Thus, the reflected light with a wavelength at the selected spatial position(s) is allowed to complete the laser cavity.
    Type: Grant
    Filed: July 3, 2017
    Date of Patent: September 17, 2019
    Assignee: Applied Optoelectronics, Inc.
    Inventors: Jun Zheng, Stefan J. Murry, Bujin Guo
  • Patent number: 10404381
    Abstract: A radio frequency (RF) link includes a link transmitter that includes a data modulator for modulating a data waveform together with an RF carrier, a photonic encoder coupled to the data modulator, and a transmitter antenna for transmitting an RF signal, wherein the RF signal comprises an output of the photonic encoder, and a link receiver including a receiver antenna for receiving the RF signal, a first laser source, a photonic limiter coupled to the first laser source and to the receiving antenna, a photonic decoder coupled to the photonic limiter, a photo-receiver coupled to the photonic decoder, and a demodulator coupled to the photo-receiver for demodulating an output of the photo-receiver with the RF carrier to form a data output.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: September 3, 2019
    Assignee: HRL Laboratories, LLC
    Inventor: Daniel Yap
  • Patent number: 10390115
    Abstract: There is provided an optical switch. The optical switch comprises a first optical waveguide, a second optical waveguide, a first optical ring resonator and a second optical ring resonator. The first optical ring resonator is arranged between the first optical waveguide and the second optical waveguide, wherein the first optical ring resonator is capable of coupling an optical signal travelling along the first optical waveguide in a first direction to the second optical waveguide such that the optical signal travels in a second direction along the second optical waveguide. The second optical ring resonator is arranged between the first optical waveguide and the second optical waveguide; wherein the second optical ring resonator is capable of coupling an optical signal travelling along the first optical waveguide in the first direction to the second optical waveguide such that the optical signal travels in a third direction along the second optical waveguide opposite to the second direction.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: August 20, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Francesco Testa, Alberto Bianchi, Marco Romagnoli, Vito Sorianello, Philippe Velha
  • Patent number: 10379301
    Abstract: The present disclosure provides a multi-channel parallel optical receiving device, including a carrier, a light receiving chip, a plurality of optoelectronic diodes disposed on a top surface of an end of the carrier, an optical fiber connector disposed in another end of the carrier, and an arrayed waveguide grating disposed on the top surface of the carrier. The plurality of optoelectronic diodes is electrically connected to the light receiving chip, and an input end of the arrayed waveguide grating is connected to the optical fiber connector for receiving an optical signal from the optical fiber. The optical signals are divided into multi-channel optical signals in parallel. The top surface of an output end of the arrayed waveguide grating is at a predetermined angle, causing the multi-channel optical signals to be reflected by the top surface and to photosensitive surfaces of the optoelectronic diodes arranged in parallel.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: August 13, 2019
    Assignee: Applied Optoelectronics, Inc.
    Inventors: Jian-Hong Luo, Dong-Biao Jiang, Peng Nie, Xiao-Liang Ding
  • Patent number: 10352852
    Abstract: A system for widely spaced wavelength tunable diode laser absorption spectroscopy includes at least a first and second tunable diode laser generating laser light at a first and second wavelength, wherein laser light of the first and second wavelengths cannot co-propagate efficiently on the same single-mode fiber. A first fiber may be configured to carry light in the first wavelength, and a second fiber configured to carry light in the second wavelength. A fiber bundle may be formed from the distal ends of the first and second fibers stripped of their respective coatings, and arranged with their claddings adjacent to each other. One or more pitch heads are configured to project respective beams of laser light from the fiber bundle through a measurement zone. One or more catch heads located across the measurement zone receive the respective beams and direct the respective beams onto at least one sensor.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: July 16, 2019
    Assignee: JOHN ZINK COMPANY, LLC
    Inventors: Andrew D. Sappey, Bernard Patrick Masterson
  • Patent number: 10317677
    Abstract: A display system comprises an optical waveguide, an actuator and a light engine. The light engine generates multiple input beams which form a virtual image. An incoupling grating of the optical waveguide couples each beam into an intermediate grating of the waveguide, in which that beam is guided onto multiple splitting regions. The intermediate grating splits that beam at the splitting regions to provide multiple substantially parallel versions of that beam. Those multiple versions are coupled into an exit grating of the waveguide, in which the multiple versions are guided onto multiple exit regions. The exit grating diffracts the multiple versions of that beam outwardly. The multiple input beams thus cause multiple exit beams to exit the waveguide which form a version of the virtual image. The actuator is coupled to the waveguide and is arranged to generate acoustic waves, which are incident on, and propagate through, the optical waveguide.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: June 11, 2019
    Assignee: Microsoft Technology Licensing, LLC
    Inventor: Tapani Levola
  • Patent number: 10310181
    Abstract: Barium titanate thin film waveguides and related modulator and devices with photonic crystal structures to promote wide bandwidths, low operating voltages and small footprint.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: June 4, 2019
    Assignee: NORTHWESTERN UNIVERSITY
    Inventors: Bruce W. Wessels, Zhifu Liu, Peter D. Girouard
  • Patent number: 10267995
    Abstract: In order to reduce a high frequency loss of a substrate-type optical waveguide without facilitating, in a low frequency domain, a reflection by an entrance end of a traveling-wave electrode, the substrate-type optical waveguide includes a coplanar line, provided on an upper surface of an upper cladding, which includes (i) a traveling-wave electrode connected to a P-type semiconductor region and (ii) an earth conductor connected to an N-type semiconductor region. The traveling-wave electrode and the earth conductor are provided so that a distance D therebetween decreases as a distance from an entrance end of the traveling-wave electrode increases.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: April 23, 2019
    Assignee: FUJIKURA LTD.
    Inventors: Shinichi Sakamoto, Kazuhiro Goi, Norihiro Ishikura
  • Patent number: 10260964
    Abstract: The present disclosure relates to an optical fiber sensor system (10) arranged to detect a temperature change in a zone (2, 3, 4) in an aircraft (1) having at least one zone (2, 3, 4). The optical fiber sensor system (10) comprises at least one optical fiber (11, 21, 31, 41) comprising a plurality of Fiber Bragg Gratings (20, 30, 40) for detecting a temperature change. Each of the Fiber Bragg Gratings (20, 30, 40) is reflecting radiation within a predetermined wavelength range. A radiation source unit (13) is arranged to emit radiation into the at least one optical fiber (11, 21, 31, 41). A radiation detector unit (14) is arranged to receive radiation from the at least one optical fiber (11, 21, 31, 41). A processing unit (15) is configured to identify a spectral response (22, 32, 42) of the received radiation and to determine a temperature change from the spectral response (22, 32, 42) of the received radiation in a predetermined wavelength range.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: April 16, 2019
    Assignee: SAAB AB
    Inventors: Fredrik Fisk, Bjorn-Erik Andersson
  • Patent number: 10241003
    Abstract: The invention relates to a method of measuring time delays with respect to differential mode delay of a multi-mode fiber or a few-mode fiber for at least two different wavelengths. The time delays for each wavelength are measured before the single mode fiber is translated to a next radial offset.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: March 26, 2019
    Assignee: Draka Comteq B.V.
    Inventors: Franciscus Johannes Achten, Denis Molin, Nam Nguyen Thang
  • Patent number: 10230486
    Abstract: An optical transceiver and a network device are provided. The optical transceiver includes a common end module and two data submodules. The common end module includes a multi-carrier light source, a wavelength division multiplexer, a wavelength division demultiplexer, an external optical interface, and two first beam splitters. Each data submodule includes a second beam splitter, an optical/electrical signal modulator, and an optical receiver. According to the optical transceiver and the network device, a high-capacity optical transceiver with a single optical interface can be implemented, so that optical interface management complexity is reduced, and a fiber resource is reduced.
    Type: Grant
    Filed: October 13, 2017
    Date of Patent: March 12, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Jiangwei Man, Xiaolu Song, Li Zeng
  • Patent number: 10141644
    Abstract: Filter circuitry is used in communication systems that employ multiple antennas. In general, a communication system may have a transmit path and a receive path. The transmit path extends to a first antenna port and is configured to present signals for transmission in a first communication band and a second communication band to the first antenna port for transmission via a first antenna that is coupled to the first antenna port. The receive path extends to a second antenna port and comprises a first multiple passband/multiple stopband filter that provides a plurality of passbands and a plurality of stopbands interleaved with one another, wherein a first stopband and a second stopband of the plurality of stopbands correspond respectively to the first communication band and the second communication band and are separated by a first passband of the plurality of passbands.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: November 27, 2018
    Assignee: Qorvo US, Inc.
    Inventors: Nadim Khlat, Robert Aigner
  • Patent number: 10135559
    Abstract: A wavelength selective switch (WSS) may include a first set of ports, each to launch a respective beam of a first set of beams, wherein the first set of beams is provided to a first position on a focal plane, and wherein a first set of wavelength channel sub-beams, included in a beam of the first set of beams, is to be incident on a particular section of a switching array. The WSS may include a second set of ports, each to launch a respective beam of a second set of beams, wherein the second set of beams is provided to a second position on the focal plane, wherein the second position is different from the first position, and wherein a second set of wavelength channel sub-beams, included in a beam of the second set of beams, is to be incident on the particular section of the switching array.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: November 20, 2018
    Assignee: Lumentum Operations LLC
    Inventors: Paul Colbourne, Sheldon McLaughlin
  • Patent number: 10133097
    Abstract: An example optical polarization controller can include a substantially planar substrate and a waveguide unit cell formed on the substantially planar substrate. The waveguide unit cell can include a first out-of-plane waveguide portion and a second out-of-plane waveguide portion coupled to the first out-of-plane waveguide portion. Each of the first and second out-of-plane waveguide portions can respectively include a core material layer arranged between a first optical cladding layer having a first stress-response property and a second optical cladding layer having a second stress-response property. The first and second stress-response properties can be different such that each of the first and second out-of-plane waveguide portions is deflected by a deflection angle.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: November 20, 2018
    Assignee: OHIO STATE INNOVATION FOUNDATION
    Inventors: Ronald M. Reano, Peng Sun, Qiang Xu
  • Patent number: 10120151
    Abstract: A cooling device includes a thermally conductive object having an opening configured to receive an optical component, the opening being configured such that the optical component is thermally and optically operationally connected to the thermally conductive and electrically conductive object. One or more cooling components, microchannel coolers in one instance, are also thermally operationally connected to the thermally conductive and electrically conductive object. Methods of use are disclosed.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: November 6, 2018
    Assignee: SCIENCE RESEARCH LABORATORY, INC.
    Inventors: Aland K. Chin, Richard H. Chin, Alan Nelson
  • Patent number: 10103436
    Abstract: Filter circuitry is used in communication systems that employ multiple antennas. In general, a communication system may have a transmit path and a receive path. The transmit path extends to a first antenna port and is configured to present signals for transmission in a first communication band and a second communication band to the first antenna port for transmission via a first antenna that is coupled to the first antenna port. The receive path extends to a second antenna port and comprises a first multiple passband/multiple stopband filter that provides a plurality of passbands and a plurality of stopbands interleaved with one another, wherein a first stopband and a second stopband of the plurality of stopbands correspond respectively to the first communication band and the second communication band and are separated by a first passband of the plurality of passbands.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: October 16, 2018
    Assignee: Qorvo US, Inc.
    Inventors: Nadim Khlat, Robert Aigner
  • Patent number: 10050416
    Abstract: A method to control an amplifying unit including a variable optical attenuator VOA and a semiconductor optical amplifier SOA is disclosed. The method first sets the attenuation of the VOA in a value realizable in the VOA and the optical gain of the SOA in a value where the SOA may operate in an optimum range. The method then gradually reduces the attenuation of the VOA as detecting the intensity of the beam output from the amplifying unit. When the intensity is still less than a target one even when the VOA shows no attenuation, the optical gain of the SOA is gradually increased to a value by which the intensity of the output beam becomes the target one.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: August 14, 2018
    Assignee: Sumitomo Electric Device Innovations, Inc.
    Inventor: Ryota Teranishi
  • Patent number: 10020865
    Abstract: A Phase Rotator and Amplitude control Unit, PRAU (500), for performing phase rotation and amplitude control of an input signal and generating an output signal with an individual phase shift is disclosed. The PRAU (500) comprises a plurality N1 of Phase Rotator and Amplitude control Circuits, PRAC. Each PRAC comprises an input port comprising in-phase and quadrature-phase inputs to receive the input signal; an output port comprising in-phase and quadrature-phase outputs, control inputs to receive phase and amplitude control parameters. The phase and amplitude control parameters comprise sign control signals and positive amplitude coefficient signals, and each positive amplitude coefficient signal has N1 digital bits. Each PRAC further comprises a plurality of switched transconductance branches, and each switched transconductance branch comprises one transconductance transistor connected in series with two switching transistors.
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: July 10, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventor: Fenghao Mu
  • Patent number: 9958614
    Abstract: An apparatus for converting fiber mode to waveguide mode. The apparatus includes a silicon substrate member and a dielectric member having an elongated body. Part of the elongated body from a back end overlies the silicon substrate member and remaining part of the elongated body up to a front end is separated from the silicon substrate member by a second dielectric material at an under region. The apparatus also includes a waveguide including a segment from the back end to a tail end formed on the dielectric member at least partially overlying the remaining part of the elongated body. The segment is buried in a cladding overlying entirely the dielectric member. The cladding has a refractive index that is less than the waveguide but includes an index-graded section with decreasing index that is formed at least over the segment from the tail end toward the back end.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: May 1, 2018
    Assignee: INPHI CORPORATION
    Inventors: Masaki Kato, Radhakrishnan L. Nagarajan
  • Patent number: 9897768
    Abstract: An optical fiber module has a package housing having an internal space defined by a base plate, a side wall, and a cover member, a laser device disposed on the base plate within the internal space, an optical fiber that transmits a laser beam emitted from the laser device to an outside of the package housing, a light scattering member that scatters light having a wavelength of the laser beam and covers an outer circumferential surface of the projecting end of the optical fiber, and a heat dissipation portion disposed on the base plate. The optical fiber has a projecting end projecting from an inner surface of the side wall toward the internal space. The heat dissipation portion covers a portion of an outer circumferential surface of the light scattering member and exposes another portion of the outer circumferential surface of the light scattering member to the internal space.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: February 20, 2018
    Assignee: FUJIKURA LTD.
    Inventor: Yohei Kasai
  • Patent number: 9850711
    Abstract: An autonomous laser-powered vehicle designed to autonomously penetrate through ice caps of substantial (e.g., kilometers) thickness by melting a path ahead of the vehicle as it descends. A high powered laser beam is transmitted to the vehicle via an onboard bare fiber spooler. After the beam enters through the dispersion optics, the beam expands into a cavity. A radiation shield limits backscatter radiation from heating the optics. The expanded beam enters the heat exchanger and is reflected by a dispersion mirror. Forward-facing beveled circular grooves absorb the reflected radiant energy preventing the energy from being reflected back towards the optics. Microchannels along the inner circumference of the beam dump heat exchanger maximize heat transfer. Sufficient amount of fiber is wound on the fiber spooler to permit not only a descent but also to permit a sample return mission by inverting the vehicle and melting its way back to the surface.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: December 26, 2017
    Assignee: Stone Aerospace, Inc.
    Inventors: William C. Stone, Bartholomew P. Hogan
  • Patent number: 9841348
    Abstract: It is provided an apparatus, comprising a box configured to conduct an optical fiber from an exterior to an interior of the box; at least one of a mounting means adapted to mount a connecting means to which the optical fiber may be connected and a guiding means adapted to guide the optical fiber, wherein the at least one of the mounting means and the guiding means is arranged in the interior of the box; a detecting means arranged in the interior of the box adapted to detect a first signal from the interior of the box, wherein the first signal is at least one of a light and a smoke; wherein the interior of the box is substantially shielded from a second signal from an exterior of the box, and the detecting means is suitable to detect the second signal in a same manner as the first signal.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: December 12, 2017
    Assignee: Xieon Networks S.a.r.l.
    Inventor: Lutz Rapp
  • Patent number: 9838125
    Abstract: A photonic beamformer is disclosed andh is configured to transmit or receive a plurality of RF input signals from a plurality of antennas. The beamformer receiver includes a plurality of optical modulators, each optical modulator being configured to modulate each of the RF input signals onto an optical carrier, each carrier having a different wavelength. The beamformer receiver also includes a plurality of optical amplifiers, each optical amplifier being configured to vary the optical power of one optical carrier based on a weighting input and generate a weighted optical carrier. The beamformer receiver also includes a plurality of multi-beam optical true-time delays (TTD), each TTD being configured to receive all of the weighted optical carriers and generate a plurality time delayed optical carriers.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: December 5, 2017
    Assignee: The Trustees of Princeton University
    Inventors: Paul Prucnal, Matthew Chang, John Chang
  • Patent number: 9835502
    Abstract: Disclosed is a temperature and strain sensing optical fiber including a first doped radial zone (Z1) with an associated first Brillouin shift (BS1) caused by the doping of said zone (Z1) and a second doped radial zone (Z2) with associated second Brillouin shift (BS2) caused by the doping of said second zone (Z2). The concentration and/or composition of the doping materials in said first and second radial zones are chosen such that the first Brillouin Shift (BS1) is different from the second Brillouin Shift (BS2) for all variations of said Brillouin Shifts (BS1, BS2) caused by temperature and/or strain.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: December 5, 2017
    Assignee: Draka Comteq B.V.
    Inventors: Ekaterina Burov, Alain Pastouret, Louis-Anne De Montmorillon
  • Patent number: 9823500
    Abstract: An optical assembly maintains 90° polarization rotation. In one aspect, an optical assembly includes a polarization beam splitter a rotational element and a path exchange mirror. The temperature, wavelength and manufacturing dependencies of polarization rotation of this optical assembly are minimal to nonexistent compared to conventional Faraday rotation assemblies as the optical fiber accepts only the desired rotation. As such these optical assemblies have no temperature and wavelength dependencies of the polarization rotation angle over broad temperature and wavelength ranges with minimal additional losses. In another aspect, the polarization dependence of reflection from the path exchange mirror is managed so as to minimize the polarization effect associated with oblique incidence.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: November 21, 2017
    Assignee: LIGHTEL TECHNOLOGIES, INC.
    Inventors: Shyh-Chung Lin, Hsin-Jung Lee
  • Patent number: 9817297
    Abstract: An apparatus comprising an optical filter located on a substrate. The optical filter including an optical splitter configured to receive an input light and an interferometer having two waveguide arms having different optical path-lengths from each other. The waveguide arms configured to receive the input light from the optical splitter. At least a portion of one of the two waveguide arms has a narrower core width than a wider core width of the other waveguide arm. The waveguide arm with the longest waveguide portion having the narrower core width has the longest total physical path-length of the two waveguide arms. At least one of the two waveguide arms having a set of discrete waveguide portions, the discrete waveguide portions of the set being connected by optical switches which are configured to tunably select from a plurality of different physical path-lengths through the discrete waveguide portions of the at least one waveguide arm.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: November 14, 2017
    Assignee: Alcatel-Lucent USA Inc.
    Inventors: Argishti Melikyan, Young-Kai Chen, Po Dong
  • Patent number: 9811573
    Abstract: A data analytics workload is obtained, wherein the data analytics workload includes one or more execution parameters and an input data set. An identifier specific to the data analytics workload is generated. The data analytics workload is at least partially executed based on the one or more execution parameters and the input data set to generate an output data set. Meta data associated with the output data set generated by execution of the data analytics workload is obtained, wherein the meta data includes lineage information corresponding to the output data set generated by execution of the input data set. The meta data is registered in a meta data store.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: November 7, 2017
    Assignee: EMC IP Holding Company LLC
    Inventors: Dong Xiang, Stephen Todd, Qiyan Chen
  • Patent number: 9804423
    Abstract: An example optical polarization controller can include a substantially planar substrate and a waveguide unit cell formed on the substantially planar substrate. The waveguide unit cell can include a first out-of-plane waveguide portion and a second out-of-plane waveguide portion coupled to the first out-of-plane waveguide portion. Each of the first and second out-of-plane waveguide portions can respectively include a core material layer arranged between a first optical cladding layer having a first stress-response property and a second optical cladding layer having a second stress-response property. The first and second stress-response properties can be different such that each of the first and second out-of-plane waveguide portions is deflected by a deflection angle.
    Type: Grant
    Filed: February 24, 2014
    Date of Patent: October 31, 2017
    Assignee: Ohio State Innovation Foundation
    Inventors: Ronald M. Reano, Peng Sun, Qiang Xu
  • Patent number: 9800347
    Abstract: An optical transmission device in an optical network in which a first optical path and a second optical path are set, the optical transmission device locating on the second optical path, the optical transmission device includes; a storage unit configured to store control data for a control of an optical transmission power to the second optical path, the control being performed based on a training signal received through the second optical path; and a controller configured to control the optical transmission power to the second optical path, based on the control data stored in the storage unit, according to a detection of an optical path change by which an optical path transmitting a main signal is changed from the first optical path to the second optical path.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: October 24, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Kazuaki Nagamine, Ichiro Nakajima
  • Patent number: 9784931
    Abstract: An optical waveguide module includes an optical waveguide sheet including multiple optical waveguides, and a light-emitting device and a light-receiving device each positioned over a surface of the optical waveguide sheet. At least one of the optical waveguides includes a first mirror, a second mirror, and a slit. The first mirror is configured to reflect light entering the corresponding optical waveguide from its first end to the light-receiving device or to reflect light emitted from the light-emitting device toward the first end of the corresponding optical waveguide. The second mirror is configured to reflect light entering the corresponding optical waveguide from its second end toward the surface of the optical waveguide sheet. The slit is provided between the second mirror and the second end of the corresponding optical waveguide. The corresponding optical waveguide is discontinuous across the slit.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: October 10, 2017
    Assignee: FUJITSU COMPONENT LIMITED
    Inventors: Rie Gappa, Osamu Daikuhara, Shinichiro Akieda, Satoshi Moriyama, Hongfei Zhang, Mitsuki Kanda
  • Patent number: 9722391
    Abstract: A laser system according to an embodiment of the present invention includes an oscillation unit to generate a laser output, a connection unit to connect the oscillation unit with an optical fiber loop, an amplifying unit to amplify the laser output on the optical fiber loop, a conversion unit disposed on the optical fiber loop to convert pulsed wave laser output into continuous wave laser output, and an output unit disposed between the connection unit and the conversion unit to split a part of the laser output toward the conversion unit. The system for generating a high output pulsed wave laser and converting the pulsed wave laser into a continuous wave laser may be implemented in a simple structure and small size with high stability and high reproducibility. In addition, a high output laser may be obtained. Also, since conversion from the pulsed wave into the continuous wave is easy, both of the high output pulsed wave and the high output continuous wave may be obtained as necessary.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: August 1, 2017
    Assignee: IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY)
    Inventors: Young Geun Han, Ryun Kyung Kim, Sang Oh Park, Oh Jang Kwon, Su Ho Chu
  • Patent number: 9667026
    Abstract: A connected optical waveguide structure comprises n four-port optical couplers, where n is greater than one; and n waveguide loops, each loop having a corresponding perimeter; wherein each of the n perimeters is different from each of the other n?1 perimeters. In one embodiment, for any pair of the n loops, the ratio of the larger perimeter to the smaller perimeter is greater than five halves (5/2).
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: May 30, 2017
    Assignee: University of Zagreb
    Inventors: Tin Komljenovic, Dubravko Babic, Zvonimir Sipus
  • Patent number: 9614622
    Abstract: A fiber-optic transmitter comprises a transmitter optical port, an optical circulator, a semiconductor optical amplifier, and a two-port modulation-averaging structure. The optical circulator has at least three ports, a first one of the three circulator ports being optically coupled to the transmitter optical port. The semiconductor optical amplifier has an input optical port, an output optical port, and an electrical input port. The two-port modulation-averaging structure is optically coupled between the input optical port and a third one of the three circulator ports.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: April 4, 2017
    Inventors: Dubravko Babic, Tin Komljenovic, Zvonimir Sipus
  • Patent number: 9590288
    Abstract: A multilayer circuit substrate includes: a first signal line and a first ground conductor formed in a first conductive layer; and a second signal line and a second ground conductor formed in a second conductive layer, the second conductive layer facing the first conductive layer across an insulating layer. The first signal line intersects with the second signal line in a plan view of the multilayer circuit substrate, a space between the first ground conductor and first signal line is smaller in an intersection area of the first and second signal lines than a space in a non-intersection area, a space between the second ground conductor and second signal line is smaller in the intersection area than a space in the non-intersection area, and the first signal line is formed at a smaller line width in the intersection area than in the non-intersection area.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: March 7, 2017
    Assignee: TAIYO YUDEN CO., LTD.
    Inventors: Tetsuo Saji, Hiroshi Nakamura
  • Patent number: 9584217
    Abstract: A method of determining properties of an optical communications path between a first optical network node (A) and a second optical network node (B) determines, at the second optical network node (B), a time difference between respective first and second optical test signals received on different wavelengths (?1, ?2) from the first optical network node. The method also determines, at the second optical network node (B), a real-time chromatic dispersion parameter for each of the wavelengths using a respective coherent receiver at the second optical network node. The method can be used to determine length of the path between the nodes (A, B). The method can be used to determine propagation delay between the nodes (A, B), or asymmetry in propagation delay between the nodes (A, B). Where separate paths are used for forward and reverse transmission directions, measurements can be made of each path.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: February 28, 2017
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Giulio Bottari, Stefano Ruffini
  • Patent number: 9577403
    Abstract: Techniques are presented herein to set power levels for multiple Raman pump wavelengths in a distributed Raman amplification configuration. A first receive power measurement is obtained at a second node with a controlled optical source at a first node turned on and with a plurality of Raman pump lasers at different wavelengths at the second node turned off. A second receive power measurement is obtained at the second node with the controlled optical source at the first node turned on and the plurality of Raman pump lasers turned on to respective reference power levels to inject optical Raman pump power at a corresponding plurality of wavelengths into the optical fiber span. Based on a target Raman gain and a target Raman gain tilt, respective ratios of a total power are obtained, each ratio to be used for a corresponding one of the plurality of Raman pump lasers.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: February 21, 2017
    Assignee: Cisco Technology, Inc.
    Inventors: Enrico Griseri, Enrico Self, Mauro Brunella
  • Patent number: 9570873
    Abstract: A method of generating ultrashort pulses with wavelengths greater than 2 ?m comprising a short pulse diode laser or fiber laser operating at a wavelength of 1 ?m or greater with a pulse width of 10 ps or greater, one or more amplification stages to increase the peak power of the pulsed source, a nonlinear fiber stage whereby the dispersion of the nonlinear fiber is anomalous at the pulsed source wavelength such that the fiber breaks up the pulse into a series of sub-ps pulse train through modulation instability which may be seeded by spontaneous noise which are then wavelength shifted in one or more stages by soliton self frequency shift in anomalous dispersion fiber or Raman in normal dispersion fiber and amplified in one or more stages to generate a high peak power ultrashort pulse (<1 ps) source at a wavelength of 2.4 ?m or greater.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: February 14, 2017
    Assignee: The United States of America, as represented by the Secretary of the Navy
    Inventors: Leslie Brandon Shaw, Rafael R. Gattass, Jasbinder S. Sanghera, Ishwar D. Aggarwal
  • Patent number: 9563012
    Abstract: A hybrid optical fiber integrates features of multimode optical fibers and single-mode optical fibers. The hybrid optical fiber possesses an optical core having a first core region and a second core region to provide improved optical mode coupling ratio for single-mode transmission while maintaining a broad bandwidth for multimode transmission. The hybrid optical fiber's optical core may optionally include a depressed trench positioned between the optical core's first core region and the optical core's second core region to reduce modal dispersion and to improve modal bandwidth during multimode transmissions.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: February 7, 2017
    Assignee: Draka Comteq, B.V.
    Inventors: Denis Molin, Pierre Sansonetti, Pierre Sillard
  • Patent number: 9547132
    Abstract: An optical element includes: a first delayed interferometer; and a second delayed interferometer and a third delayed interferometer cascaded to the first delayed interferometer. The first delayed interferometer includes: a first optical coupler and a second optical coupler; a first waveguide between the first optical coupler and the second optical coupler; a second waveguide between the first optical coupler and the second optical coupler, the second waveguide being longer than the first waveguide; and a ring waveguide that is coupled to the first waveguide. A difference between a length of the first waveguide and a length of the second waveguide differs from a difference in lengths corresponding to a channel spacing by a length corresponding to a phase displacement caused by loading of the ring waveguide.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: January 17, 2017
    Assignees: FUJITSU LIMITED, PHOTONICS ELECTRONICS TECHNOLOGY RESEARCH ASSOCIATION
    Inventor: Seokhwan Jeong
  • Patent number: 9537600
    Abstract: The invention relates to a receiving device (Rx1_b) capable of receiving an optical signal emitted by an emitting device including a light source for emitting the optical signal, the optical signal being transmitted by a passive optical network having wavelength division multiplexing, the receiving device including: an optical amplifier (Amp_b) for amplifying the optical signal received from the emitting device; an optical detector (D_b) capable of detecting data in the amplified optical signal; an optical reflector (Ref_b) configured to return the amplified optical signal toward the emitting device, such as to tune the wavelength of the optical signal emitted by the emitting device by means of a round trip of the optical signal between the emitting device and the optical reflector.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: January 3, 2017
    Assignee: Orange
    Inventors: Philippe Chanclou, Fabienne Saliou, Qian Deniel
  • Patent number: 9467228
    Abstract: An optical transmission system includes an optical transmitter and an optical receiver. The optical transmitter includes: a first digital signal processor configured to generate an electric-field information signal corresponding to a transmission signal; and a transmitter front-end configured to generate an optical signal from the electric-field information signal. The optical receiver includes: a receiver front-end configured to generate an electric signal corresponding to the optical signal; and a second digital signal processor configured to detect polarization dependent effects on the optical signal based on the electric signal. The first digital signal processor corrects the electric-field information signal based on the polarization dependent effects detected by the second digital signal processor in the optical receiver.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: October 11, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Hisao Nakashima, Takeshi Hoshida, Takahito Tanimura