Multiple Pole Multiple Throw Patents (Class 385/20)
  • Patent number: 10110466
    Abstract: A wet plant manager (WPM) platform is disclosed in accordance with an embodiment of the present disclosure, and supports management of Smart Undersea Network Elements (SUNEs) by providing an abstracted view of the same to higher level network management functions within an optical communication system. The optical communication system can include an optical cable system extending between two or more cable landing stations (CLSs). Each CLS may execute a respective instance of a WPM platform service, with the collective WPM platform performing self-coordination such that only one instance of a WPM service is “active” at any given time. The active WPM service supports a plurality of network topologies architected around SUNEs and “bridges” them such that requests to communicate with a particular SUNE get handled in a transparent manner without the requesters specific knowledge of which command/response (CR) telemetry path was utilized to satisfy the request.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: October 23, 2018
    Assignee: TYCO ELECTRONICS SUBSEA COMMUNICATIONS LLC
    Inventors: Yuriy Tsaltskan, Richard Kram, Jonathan M. Liss
  • Patent number: 10061085
    Abstract: An optical switching system comprising a switching cell having first and second fixed-position bus waveguides and a moveable shunt waveguide is disclosed. The first bus waveguide includes an input and a first output. The second bus waveguide includes a second output. When the switching cell is in its unswitched state, the shunt waveguide is not optically coupled with either bus waveguide and a light signal can pass from the input to the first output while remaining in the first bus waveguide. When the switching cell is in its switched state, the shunt waveguide is optically coupled with both bus waveguides such that the light signal is coupled out of the first bus waveguide and into the second bus waveguide via the shunt waveguide. As a result, the light signal can pass from the input to the second output while bypassing the first input.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: August 28, 2018
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Ming C. Wu, Sangyoon Han, Tae Joon Seok, Niels Quack, Byung-Wook Yoo
  • Patent number: 9989788
    Abstract: The invention provides an electro-optically induced waveguide including: a waveguide layer stack having a core layer including an electro-optic material for guiding light waves; and a field generator for generating an electrical field in the core layer, wherein the field generator includes an electrode arrangement having a plurality of electrodes and a voltage supply arrangement for supplying at least two potentials to the electrode arrangement; wherein the field generator is configured to induce an electro-optic effect by the generated electrical field in a first cross sectional region of the core layer such that a propagation of transverse-electric polarized light waves is enabled in the first cross sectional region; wherein the field generator is configured to induce an electro-optic effect by the generated electrical field in a second cross sectional region of the core layer such that a propagation of transverse-magnetic polarized light waves is enabled in the second cross sectional region; and wherein
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: June 5, 2018
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Martin Blasl, Florenta Costache, Haldor Hartwig
  • Patent number: 9417395
    Abstract: An optical path system includes a first rectangular block that further includes multiple first fiber optic guides, arranged in a first configuration, into which are placed multiple first optical fibers, one fiber in each guide. The optical path system further includes a second rectangular block comprising multiple second fiber optic guides, arranged in a second configuration, into which are placed multiple second optical fibers, one fiber in each guide, wherein a first face of the second rectangular block abuts a first face of the first rectangular block and wherein the first block is movable relative to the second block. The optical path system also includes micro-position adjusting mechanisms configured to move the first block relative to the second block to align the multiple first optical fibers with the multiple second optical fibers.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: August 16, 2016
    Assignee: Verizon Patent and Licensing Inc.
    Inventors: Tiejun J. Xia, Glenn A. Wellbrock
  • Patent number: 9146357
    Abstract: A cartridge-type optical functional module achieves excellent optical coupling and may include an optical fiber-type module and/or a waveguide-type module. A cartridge-type optical functional module is provided that includes first and second optical fiber collimators, an optical functional object that has an optical fiber-type module or a waveguide-type module, and a base section. The optical functional object also includes a third collimator, and a first alignment mechanism for aligning the position of the third collimator in the optical functional object.
    Type: Grant
    Filed: July 19, 2012
    Date of Patent: September 29, 2015
    Assignees: NATIONAL INSTITUTE OF INFORMATION AND COMMUNICATIONS TECHNOLOGY, OPTOQUEST CO., LTD.
    Inventors: Naoya Wada, Tetsuya Kobayashi, Yusaku Tottori
  • Patent number: 9025915
    Abstract: A method and module for affecting controlled switching of optical signals having different modes of propagation, wherein the module being provided with at least two multi-mode ports MMPs and a plurality of single-mode ports SMPs, the method comprises: inputting at least one multimode optical signal to an MMP of said MMPs; inputting the single mode optical signals to the SMPs; performing mode processing of one or more of the single mode and multi mode optical signals within the switching module, controllably and selectively switching different optical signals inputted to different ports of the module, preferably based on received feedback related to quality information, thereby allowing switching between single mode ports, between multi-mode ports, and between single mode and multi mode ports.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: May 5, 2015
    Assignee: ECI Telecom Ltd.
    Inventor: Uri Mahlab
  • Patent number: 8938139
    Abstract: Embodiments of the present invention are directed to optoelectronic network switches. In one embodiment, an optoelectronic switch includes a set of roughly parallel input waveguides and a set of roughly parallel output waveguides positioned roughly perpendicular to the input waveguides. Each of the output waveguides crosses the set of input waveguides. The optoelectronic switch includes at least one switch element configured to switch one or more optical signals transmitted on one or more input waveguides onto one or more crossing output waveguides.
    Type: Grant
    Filed: March 11, 2008
    Date of Patent: January 20, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Moray McLaren, Jung Ho Ahn, Nathan L. Binkert, Alan L. Davis, Norman Paul Jouppi
  • Patent number: 8934742
    Abstract: An optical beam switch includes at least one input optical wave guide, multiple output optical wave guides and an optical switching element for selectively switching a light beam guided in the at least one input optical wave guide to one of the output optical wave guides, in which the switching element is between the at least one input optical waveguide and the multiple output optical waveguides. The optical switching element includes a beam propagation element and an optical focusing system, where the beam propagation element has two mutually opposed end faces and where either the beam propagation element or the optical focusing system can be deflected and/or twisted transversely to an optical axis. The at least one input optical wave guide is attached to a first end face of the beam propagation element, and the output optical wave guides are attached to a second end face.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: January 13, 2015
    Assignee: TRUMPF Laser GmbH + Co. KG
    Inventors: Andreas Voss, Thomas Rataj
  • Patent number: 8909007
    Abstract: A circuit switched optical device includes a first array of intersecting hollow waveguides formed in a first plane of a substrate. A second array of intersecting hollow waveguides is formed in a second plane of the substrate, and the second plane is positioned parallel to the first plane. An optical element within the first array selectively redirects an optical signal from the first array to the second array.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: December 9, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Shih-Yuan (S Y) Wang, Michael Renne Ty Tan
  • Patent number: 8891915
    Abstract: An optical switch system and the system includes a semi-transmissive semi-reflective module is configured to intercept, in a transmission manner, test light that is the same as the signal light with respect to the propagation path and output after being modulated by the optical output control module; the imaging module is configured to acquire the test light, generate corresponding initial optical path information and sampled optical path information in sequence, and transfer the initial optical path information and the sampled optical path information to the judging module in sequence; the judging module is configured to record the initial optical path information, and compare the sampled optical path information with the initial optical path information; and the control module is configured to control the optical output control module according to a comparison result.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: November 18, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Shijun Wang, Yunsheng Wen, Jun Zhao
  • Patent number: 8891914
    Abstract: Telecommunications switches are presented, including expandable optical switches that allow for a switch of N inputs×M outputs to be expanded arbitrarily to a new number of N inputs and/or a new number of M outputs. Switches having internal switch blocks controlling signal bypass lines are also provided, with these switches being useful for the expandable switches.
    Type: Grant
    Filed: October 27, 2012
    Date of Patent: November 18, 2014
    Assignee: NeoPhotonics Corporation
    Inventors: Anthony J. Ticknor, Ilya Vorobeichik, Winston Way
  • Patent number: 8855450
    Abstract: A system for measuring properties of a thin film coated glass having a light source, a spectrometer, at least one pair of probes, a first optical fiber switch and a second optical fiber switch. The pair of probes includes a first probe located on one side of a glass sheet and a second probe located on the opposite side of the glass sheet, directly across from the first probe. The first and second optical fiber switches are adapted to couple either probe to the light source and/or the spectrometer. Because the design of the system is optically symmetrical, calibration may be performed without the use of a reference material such as a tile or mirror. Each of the first and second probes has a first leg and a second leg that are separated from each other by a distance n so that angled reflections may be detected.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: October 7, 2014
    Assignee: Cardinal CG Company
    Inventors: Jordan B. Lagerman, Keith J. Burrows, Kyle R. Thering
  • Patent number: 8781271
    Abstract: A compact photonic time delay unit. The unit includes a plurality of compact optical delay elements, a plurality of delay bypass elements, with each delay bypass element being associated with a respective one of the compact optical delay elements, and a plurality of compact optical switches. Each of the compact optical switches is configured to controllably switch an optical signal through one of the compact optical delay elements or through the associated delay bypass element. In some aspects, the compact optical delay elements, delay bypass elements, and compact optical switches are disposed on a single electro-optical chip.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: July 15, 2014
    Assignee: Lockheed Martin Corporation
    Inventor: Thomas W. Karras
  • Patent number: 8781270
    Abstract: An optical cross-connect apparatus includes: a plurality of switch units connected to each other via input ports and output ports; a storage unit to store a setting table in which output port information and corresponding input port information are associated together and registered for each optical signal such that the output port information identifies a specific output port, in the output ports, that outputs the optical signal and the input port information identifies a specific input port, in the input ports, that inputs the optical signal; a setting processor to set each switch unit in the plurality of switch units according to the setting table so as to set a wavelength for each optical signal that is input via the input ports or output via the output ports; and an update processor to update the content of the setting table in response to external input.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: July 15, 2014
    Assignee: Fujitsu Limited
    Inventors: Hisashi Taketomi, Yasuko Nozu, Kohei Ichimura
  • Patent number: 8781319
    Abstract: A configurable optical communications system (100) for establishing point-to-point communications between multiple computer servers (160) coupled to a common midplane or backplane communications bus (132), wherein at least two of the servers include an optical input/output device (170) for sending and receiving an optical signal (112). The system further includes an optical communications pathway (140) that is configured to carry the optical signal, and at least two pivotable mirrors (150) located within the optical pathway and in-line with the optical input/output devices that are selectively orientated to direct the optical signal between the optical input/output devices to establish the point-to-point communication between the at least two servers.
    Type: Grant
    Filed: January 9, 2009
    Date of Patent: July 15, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Martin Goldstein, Terrel Morris, Eric Peterson, Paul Kessler Rosenberg
  • Patent number: 8693827
    Abstract: Disclosed is a three-wavelength optical multiplexer which is compact, and which multiplexes light having different wavelength incident to three single-mode optical fibers, particularly light of red, green, and blue at transmittance above a certain reference.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: April 8, 2014
    Assignee: Tatsuta Electric Wire & Cable Co., Ltd.
    Inventors: Takatomo Katayama, Tomoyuki Kubota
  • Patent number: 8666202
    Abstract: A system for measuring properties of a thin film coated glass having a light source, a spectrometer, at least one pair of probes, a first optical fiber switch and a second optical fiber switch. The pair of probes includes a first probe located on one side of a glass sheet and a second probe located on the opposite side of the glass sheet, directly across from the first probe. The first and second optical fiber switches are adapted to couple either probe to the light source and/or the spectrometer. Because the design of the system is optically symmetrical, calibration may be performed without the use of a reference material such as a tile or mirror.
    Type: Grant
    Filed: February 20, 2012
    Date of Patent: March 4, 2014
    Assignee: Cardinal IG Company
    Inventors: Jordan B. Lagerman, Keith J. Burrows, Kyle R. Thering
  • Publication number: 20130259422
    Abstract: An N×N switching apparatus for optical components is provided. A switching apparatus includes a first element that provides for a supply of a length of optical fiber in tension and has an interface component for maintaining an end of the optical fiber in tension at a first position. The switching apparatus further includes a second element that has a coupling component for detachably maintaining the end of the optical fiber at a second position. The first and second elements are arranged such that the end of the optical fiber is movable between the first and second elements.
    Type: Application
    Filed: March 28, 2012
    Publication date: October 3, 2013
    Applicant: GO!FOTON HOLDINGS, INC.
    Inventors: Kenichiro Takeuchi, Qin Zhang, Haiguang Lu
  • Publication number: 20130243373
    Abstract: An optical cross-connect apparatus includes: a plurality of switch units connected to each other via input ports and output ports; a storage unit to store a setting table in which output port information and corresponding input port information are associated together and registered for each optical signal such that the output port information identifies a specific output port, in the output ports, that outputs the optical signal and the input port information identifies a specific input port, in the input ports, that inputs the optical signal; a setting processor to set each switch unit in the plurality of switch units according to the setting table so as to set a wavelength for each optical signal that is input via the input ports or output via the output ports; and an update processor to update the content of the setting table in response to external input.
    Type: Application
    Filed: December 26, 2012
    Publication date: September 19, 2013
    Applicant: FUJITSU LIMITED
    Inventors: Hisashi Taketomi, Yasuko Nozu, Kohei Ichimura
  • Patent number: 8538210
    Abstract: Techniques for designing optical devices that can be manufactured in volume are disclosed. In an exemplary an optical assembly, to ensure that all collimators are on one side to facilitate efficient packaging, all collimators are positioned on both sides of a substrate. Thus one or more beam folding components are used to fold a light beam up and down through the collimators on top of the substrate and bottom of the substrate.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: September 17, 2013
    Assignee: Alliance Fiber Optic Products, Inc.
    Inventors: Daoyi Wang, Frank Wu
  • Publication number: 20130094805
    Abstract: A line switching device includes multiple input ports to which signals are input and that include first input ports and second input ports different from the first input ports; multiple output ports that include given output ports; a branch unit that branches first signals input from the first input ports; and a switch that selectively outputs, among second signals input from the second input ports and branched signals branched from the first signals by the branch unit, signals that are to be switched to an output port among the given ports.
    Type: Application
    Filed: August 10, 2012
    Publication date: April 18, 2013
    Applicant: FUJITSU LIMITED
    Inventors: Shigeo TANI, Takashi Umegaki
  • Publication number: 20130077916
    Abstract: A method and module for affecting controlled switching of optical signals having different modes of propagation, wherein the module being provided with at least two multi-mode ports MMPs and a plurality of single-mode ports SMPs, the method comprises: inputting at least one multimode optical signal to an MMP of said MMPs; inputting the single mode optical signals to the SMPs; performing mode processing of one or more of the single mode and multi mode optical signals within the switching module, controllably and selectively switching different optical signals inputted to different ports of the module, preferably based on received feedback related to quality information, thereby allowing switching between single mode ports, between multi-mode ports, and between single mode and multi mode ports.
    Type: Application
    Filed: September 27, 2012
    Publication date: March 28, 2013
    Applicant: ECI TELECOM LTD.
    Inventor: ECI Telecom Ltd.
  • Publication number: 20120328239
    Abstract: A method for automatic confirmation of an optical network element optical modules each having multiple fibres; a fibre shuffle interconnector having ports to which said optical modules are connected; and a configuration unit which performs an automatic configuration of said optical network element by controlling all optical modules connected to said fibre shuffle interconnector to transmit a fibre identifier associated with a fibre of the respective optical module to the respective port of said fibre shuffle interconnector to which said optical module is connected, wherein said fibre shuffle interconnector forwards the received fibre identifier via another port of said fibre shuffle interconnector to another optical module of said optical network element which detects said forwarded fibre identifier being monitored by said configuration unit to generate a connectivity matrix indicating the connection of said optical modules to said fibre shuffle interconnector on the basis of the detected fibre identifiers.
    Type: Application
    Filed: December 14, 2011
    Publication date: December 27, 2012
    Applicant: ADVA AG Optical Networking
    Inventors: Cornelius FUERST, Joerg-Peter ELBERS, Andreas FAERBERT
  • Publication number: 20120321241
    Abstract: Systems and methods according to these exemplary embodiments provide for optical interconnection using optical splitters and interferometer-based optical switching. Optical signals can be routed from an input port to one or more output ports via at least one splitter and at least one interferometer, e.g., a Mach Zehnder interferometer. According to one exemplary embodiment, signal degradation associated with signal splitting is mitigated by using a binary tree of splitters and interferometers between input ports and output ports.
    Type: Application
    Filed: December 22, 2010
    Publication date: December 20, 2012
    Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Martin JULIEN, Robert BRUNNER, Stephane LESSARD
  • Publication number: 20120263414
    Abstract: A circuit switched optical interconnection fabric includes a first hollow metal waveguide and a second hollow metal waveguide which intersects the first hollow metal waveguide to form an intersection. An optical element within the intersection is configured to selectively direct an optical signal between the first hollow metal waveguide and a second hollow metal waveguide.
    Type: Application
    Filed: December 21, 2009
    Publication date: October 18, 2012
    Inventors: Michael Renne Ty Tan, Nathan Lorenzo Binkert, Norman Paul Jouppi, Moray McLaren, Jung Ho Ahn
  • Publication number: 20120087622
    Abstract: A mechanical fiber optic switch including a plurality of first optical fibers, having optical interface ends distributed along a longitudinal axis in a plurality of longitudinal levels, two or more of the longitudinal levels including a plurality of optical interface ends in different radial angles. In addition, the switch includes a plurality of second fibers movable relative to the longitudinal axis, such that each of the second fibers can be optically coupled with the optical interface ends of first fibers in a specific respective radial angle. A fiber gripper is adapted to move the second fibers and a movement mechanism is adapted to move the fiber gripper along the longitudinal axis and to achieve relative rotation of the fiber gripper around the longitudinal axis.
    Type: Application
    Filed: December 4, 2011
    Publication date: April 12, 2012
    Applicant: Teliswitch Solutions Ltd.
    Inventors: Yeshayahu Zalitzky, Rafi Benatar
  • Publication number: 20110273703
    Abstract: An opto-mechanical switch produces different optical paths from two optical path sections out of a plurality of optical path sections that are oriented in different spatial directions. The switch has an optical component on which one end of each optical path section impinges, and which is adapted to be moved linearly in a direction of movement at right angles to the optical path sections between different switching positions, in which it selectively couples different optical path sections optically with each other. Further provided is a measuring system for the analysis of fluids, having such an opto-mechanical switch.
    Type: Application
    Filed: May 6, 2011
    Publication date: November 10, 2011
    Inventors: Marko Brammer, Timo Mappes
  • Patent number: 8005327
    Abstract: An optical transmission module includes a first transmission line for transmitting an electric signal, a resistance element used as a termination point, a second transmission line connected to the resistance element, and a surface ground pattern forming a coplanar line through the first and second transmission lines on a surface of a substrate. A modulator-integrated light-emitting element for outputting output light from an output end face is connected to the surface ground pattern. An electrode pad for modulator driving is located near the output end face on a top face of the modulator-integrated light-emitting element. The first transmission line and the electrode pad are connected by a first wire. The electrode pad and the second transmission line are connected by a second wire. A first notch portion is located in the substrate at a point of intersection between a propagation path of output light of the modulator integrated light-emitting element and a first side face of the substrate.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: August 23, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takeshi Saito, Norio Okada
  • Patent number: 7876981
    Abstract: An optical switch comprises a plurality of input ports and a plurality of out port ports; a plurality of displaceable optical elements for directing beams from a selected input to a selected output; wherein the number of displaceable elements substantially corresponds to either the number of input ports or the number of output ports.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: January 25, 2011
    Assignee: Polatis Ltd.
    Inventor: Andrew Nicholas Dames
  • Patent number: 7826697
    Abstract: A system and method of asymmetrical fiber or waveguide spacing comprising, in general, an asymmetrical fiber concentrator array (FCA), wherein an offset in the front face spacing of the output waveguides relative to the input waveguides functions to reduce or eliminate the introduction of static back reflection, and static in-to-in crosstalk into a fiber by an optical switch, but does not impose the cost, complexity, and insertion loss penalties brought about by additional components.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: November 2, 2010
    Assignee: Olympus Corporation
    Inventors: Harry W. Presley, Michael L. Nagy
  • Patent number: 7787720
    Abstract: An optical coupling device including: at least a first input port for delivering an optical input signal beam that includes a plurality of wavelength channels; at least a first optical output port for receiving an optical output signal beam; a wavelength dispersion element for spatially separating the plurality of wavelength channels in the optical input signal beam to form a plurality of spatially separated wavelength channel beams; an optical coupling device for independently modifying the phase of each of the spatially separated wavelength channel beams such that, for at least one wavelength channel beam, a selected fraction of the light is coupled to the first output port and a fraction of the light is coupled away from the first output port.
    Type: Grant
    Filed: September 27, 2004
    Date of Patent: August 31, 2010
    Assignee: Optium Australia PTY Limited
    Inventors: Steven James Frisken, Glenn Wayne Baxter, Hao Zhou, Dmitri Abakoumov
  • Patent number: 7760057
    Abstract: An electrical switching device, especially a high-frequency switching device, comprising an elongate electrical switching element, a contact end of which is disposed between two opposite contact elements that are transversally spaced apart from each other. The switching element can be selectively moved perpendicularly to the longitudinal direction thereof towards one or the other opposite contact element by two adjusting elements that are located on both sides next to the switching element. In order to eliminate or at least reduce frictional processes and the risk of the electrical contact being damaged by abrasion, the switching element is made at least in part of magnetic material while the adjusting elements are formed by two magnet assemblies, the magnetic force of one magnet assembly or the other magnet assembly being selectively reducible or increasable.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: July 20, 2010
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Markus Leipold, Helmut Hingrainer, Alexander Bayer
  • Patent number: 7696901
    Abstract: Subterranean oilfield sensor systems and methods are provided. The subterranean oilfield sensor systems and methods facilitate downhole monitoring and high data transmission rates with power provided to at least one downhole device by a light source at the surface. In one embodiment, a system includes uphole light source, a downhole sensor, a photonic power converter at the downhole sensor, an optical fiber extending between the uphole light source and the photonic power converter, and downhole sensor electronics powered by the photonic power converter. The photonic power converter is contained in a high temperature resistant package. For example, the high temperature resistant package and photonic power converter may operate at temperatures of greater than approximately 100° C.
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: April 13, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Colin Wilson, Soon Seong Chee, Les Nutt, Tsutomu Yamate, Masahiro Kamata
  • Patent number: 7697802
    Abstract: This invention pertains to optical fiber transmission networks, and is particularly relevant to transmission of high volume of data and voice traffic among different locations. In particular, the improvement teaches improvements to an optical transport system to allow for efficient and flexible network evolution.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: April 13, 2010
    Inventor: Marvin R. Young
  • Patent number: 7680370
    Abstract: Provided is an optical wavelength coupler using a multi-mode interference. The optical wavelength coupler is a planar waveguide type optical device that can distribute or couple two optical signals having different wavelengths by using the multi-mode interference. The optical wavelength coupler is suitable for integration and is small-sized. Also, the optical wavelength coupler has a low manufacturing tolerance and a low loss, and is insensitive to TE/TM polarization.
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: March 16, 2010
    Inventors: Bongjun Lee, Jongkyun Hong
  • Patent number: 7639910
    Abstract: An optical module is configured with a combination of a single-mode oscillating light source and an optical filter. In this optical module, the single-mode oscillating light source outputs a single-mode, frequency-modulated signal. Further, the optical filter converts the frequency modulation to an amplitude modulation. And, the single-mode oscillating light source and the optical filter are packaged without active alignment on the same substrate. Accordingly, it is possible to realize an optical module in a simple and low-cost configuration by packaging the single-mode oscillating light source and the optical filter by passive alignment, without active alignment, on the same substrate, and by using a simple optical filter such as a waveguide ring resonator, which converts a frequency modulation to an amplitude modulation.
    Type: Grant
    Filed: June 6, 2007
    Date of Patent: December 29, 2009
    Assignee: NEC Corporation
    Inventors: Hiroyuki Yamazaki, Takaaki Hatanaka
  • Patent number: 7639900
    Abstract: An arrangement includes a photonic band-gap assembly comprising at least one input wave guide and at least one output wave guides, and at least one routing element responsive to signals to selectively route a signal from the input wave guide to one or more of the output wave guides.
    Type: Grant
    Filed: May 6, 2009
    Date of Patent: December 29, 2009
    Inventors: Muriel Y. Ishikawa, Edward K. Y. Jung, Clarence T. Tegreene
  • Patent number: 7626754
    Abstract: An apparatus and method for steering a beam of light using an array of tunable optical phase delay elements is presented. The sidelobes of an angular spectrum of light reflected from the array are causing an optical crosstalk. The selected sidelobes are suppressed by perturbing the phase delay pattern of the array elements. The pattern of perturbations is found by linearizing a system of equations describing dependence of the angular spectrum of the reflected light on the phase delays introduced into the wavefront of light by the elements of the array.
    Type: Grant
    Filed: August 12, 2008
    Date of Patent: December 1, 2009
    Assignee: JDS Uniphase Corporation
    Inventor: Christopher Reimer
  • Publication number: 20090257709
    Abstract: An optical switch comprises a plurality of input ports and a plurality of out port ports; a plurality of displaceable optical elements for directing beams from a selected input to a selected output; wherein the number of displaceable elements substantially corresponds to either the number of input ports or the number of output ports.
    Type: Application
    Filed: July 15, 2005
    Publication date: October 15, 2009
    Applicant: Polatis Ltd.
    Inventor: Andrew Nicholas Dames
  • Patent number: 7590312
    Abstract: The present invention discloses an interferometer optical switch that can carry out switching over a broad band and has a high extinction ratio and large fabrication tolerance. The interferometer optical switch employs a phase generating coupler, the phase difference of the output of which has wavelength dependence, as at least one of the optical multi/demultiplexing device included in the interferometer optical switch. A wavelength insensitive interferometer optical switch is implemented by making the sum 2?{?1(?)+??L(?)+?2(?)} constant regardless of the wavelength, where ?1(?) is the phase produced by the first optical multi/demultiplexing device, 2???L(?) is the phase difference of the optical delay line with an optical path length difference of ?L, and 2??2(?) is the phase produced by the second optical multi/demultiplexing device.
    Type: Grant
    Filed: July 2, 2004
    Date of Patent: September 15, 2009
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Takayuki Mizuno, Hiroshi Takahashi, Tsutomu Kitoh, Manabu Oguma, Shunichi Souma
  • Patent number: 7561766
    Abstract: A thin film interleaver device is disclosed. The thin film interleaver includes thin film optics. The thin film(s) are formed such that they reflect one group of wavelengths while allowing a second group of wavelengths to pass through the thin film(s). The thin film(s) exhibit a flat top frequency response across the channel bandwidths of the multiplexed signal for which the thin film filter is designed such that the thin film interleaver is less sensitive to wavelength drift and temperature variations.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: July 14, 2009
    Assignee: Finisar Corporation
    Inventors: Johhny Zhong, Yin Zhang, Steve Wang, Ping Xie, Kevin Zhang
  • Patent number: 7529454
    Abstract: A photonic crystal may be configured to support a surface state for logic.
    Type: Grant
    Filed: March 17, 2006
    Date of Patent: May 5, 2009
    Inventors: Roderick A. Hyde, Nathan P. Myhrvold
  • Patent number: 7483602
    Abstract: An optical switch device includes a first array (20) of reflectors (22), each associated with a separate optical fiber input (12), and a second array (30) of reflectors (32), each associated with a separate fiber output (14). The reflectors (22 and 32) are positionable to direct an optical signal from any one of the fiber inputs (12) to any one of the fiber outputs (14). The optical signal is directed along an optical pathway between the desired fiber output (14) and its associated reflector that is substantially aligned with an axis extending centrally from the fiber output. Preferably, symmetrical fiber beam forming units for forming the optical signal into a focused beam are included between the fiber inputs (12) and the first array as well as between the second array (20) and the fiber outputs (14).
    Type: Grant
    Filed: May 26, 2006
    Date of Patent: January 27, 2009
    Assignee: AFN, LLC
    Inventors: Herzel Laor, Leo A. Plouffe, David A. Krozier
  • Patent number: 7477813
    Abstract: The invention provides a multi-beam light source including a light guide array by which the yield can be improved. An array pitch P2 of entrance surfaces of light guide pattern is 1/N as wide as an array pitch P1 of exit surfaces of optical fiber arrays. The number of the light guide patterns is N or more times as large as the number of optical fibers. The exit surfaces of a plurality of the optical fibers are coupled with the entrance surfaces of a plurality of the light guide patterns opposed thereto.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: January 13, 2009
    Assignee: Ricoh Printing Systems, Ltd.
    Inventors: Susumu Monma, Takeshi Mochizuki, Keiji Kataoka
  • Publication number: 20080273834
    Abstract: A packaged stack of optical devices includes two or more WDM optical devices, the stack having a reduced per-channel manufacturing cost and an improved mean time between failure relative to individual optical devices. WDM optical devices, which may be contained in a packaged stack, include wavelength selective switches, optical add-drop multiplexers, and dynamic gain equalizers. The optical switching devices in the stack may be configured so that one or more optical elements are shared by multiple switching devices. Optical components that may be shared between the switching devices contained in the stack include cylindrical lenses, diffraction gratings, mirrors, and beam steering units.
    Type: Application
    Filed: May 1, 2007
    Publication date: November 6, 2008
    Inventor: Giovanni Barbarossa
  • Patent number: 7437029
    Abstract: A monolithic photonic integrated circuit (PIC) chip where the active waveguide cores of the modulated sources of the PIC are multiple quantum wells (MQWs) and the passive waveguide cores of an optical combiner are a bulk layer or material. The cores of the waveguide cores may be a quaternary such as InGaAsP or InAlGaAs.
    Type: Grant
    Filed: April 7, 2006
    Date of Patent: October 14, 2008
    Assignee: Infinera Corporation
    Inventors: Charles H. Joyner, Fred A. Kish, Jr., Frank H. Peters, Atul Mathur, David F. Welch, Andrew G. Dentai, Damien Lambert, Richard P. Schneider, Mark J. Missey
  • Patent number: 7428362
    Abstract: A photonic crystal may be configured to support a surface state for logic.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: September 23, 2008
    Inventors: Roderick A. Hyde, Nathan P. Myhrvold
  • Patent number: 7412124
    Abstract: Techniques for designing optical devices with high reflection isolation are disclosed. According to one aspect of the devices, a pair of conjugate optical filters is used. To preserve the performance of the filters and minimize insertion loss, a lens has a first side and a second side, the first side being preferably perpendicular to an optical axis of the lens, and the second side being nearly perpendicular to the optical axis of the lens. Thus one of the conjugate optical filters is deposed towards the first side of the lens and the other one of the conjugate optical filters is deposed towards the second side of the lens. When a reflected light from one filter, presumably carrying residuals of a transmitted signal, hits another filter, the residuals are blocked, resulting in great isolation for the R-channel from the T-channel.
    Type: Grant
    Filed: June 18, 2004
    Date of Patent: August 12, 2008
    Assignee: Alliance Fiber Optic Products, Inc.
    Inventor: Chun He
  • Patent number: 7403678
    Abstract: An optical switching element comprising: a multimode waveguide having an electro-optical effect; one or a plurality of first single mode waveguides; a plurality of second single mode waveguides; a first electrode arranged in the vicinity of one edge on one side of the multimode waveguide; a second electrode arranged in the vicinity of the other edge on the same side of the multimode waveguide; and a third electrode arranged on the other side of the multimode waveguide, over the first electrode and the second electrode being arranged so as to be positioned on bright spots formed by multimode interference in an optical mode field generated by the light propagating through the multimode waveguide, and an optical path being switched between the first single mode waveguide and the second single mode waveguide by applying voltage between the first electrode and the third electrode and between the second electrode and the third electrode, is provided.
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: July 22, 2008
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Roshan Thapliya, Shigetoshi Nakamura, Takashi Kikuchi
  • Patent number: 7403690
    Abstract: A photonic crystal may be configured to support a surface state for logic.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: July 22, 2008
    Inventors: Roderick A. Hyde, Nathan P. Myhrvold