Double Pole Multiple Throw Patents (Class 385/21)
  • Patent number: 10317625
    Abstract: A method of fabricating a polymer waveguide (PWG) is presented. The method includes preparing a polymer waveguide (PWG) sheet having a surface with partially exposed cores and partially exposed cladding, the cladding covering the cores and preparing a first dicing tape, the first dicing tape being an ultraviolet (UV) cut type dicing tape defining separation lines on a back side thereof. The method further includes placing the partially exposed cores of the PWG sheet on the first dicing tape to prevent the surface of the PWG sheet from atmospheric contaminations and placing a tape side of the first dicing tape attached to the PWG sheet on a second dicing tape.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: June 11, 2019
    Assignee: International Business Machines Corporation
    Inventors: Akihiro Horibe, Hidetoshi Numata
  • Patent number: 10302868
    Abstract: A method of fabricating a polymer waveguide (PWG) is presented. The method includes preparing a polymer waveguide (PWG) sheet having a surface with partially exposed cores and partially exposed cladding, the cladding covering the cores and preparing a first dicing tape, the first dicing tape being an ultraviolet (UV) cut type dicing tape defining separation lines on a back side thereof. The method further includes placing the partially exposed cores of the PWG sheet on the first dicing tape to prevent the surface of the PWG sheet from atmospheric contaminations and placing a tape side of the first dicing tape attached to the PWG sheet on a second dicing tape.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: May 28, 2019
    Assignee: International Business Machines Corporation
    Inventors: Akihiro Horibe, Hidetoshi Numata
  • Patent number: 10133003
    Abstract: A method of fabricating a polymer waveguide (PWG) is presented. The method includes preparing a polymer waveguide (PWG) sheet having a surface with partially exposed cores and partially exposed cladding, the cladding covering the cores and preparing a first dicing tape, the first dicing tape being an ultraviolet (UV) cut type dicing tape defining separation lines on a back side thereof. The method further includes placing the partially exposed cores of the PWG sheet on the first dicing tape to prevent the surface of the PWG sheet from atmospheric contaminations and placing a tape side of the first dicing tape attached to the PWG sheet on a second dicing tape.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: November 20, 2018
    Assignee: International Business Machines Corporation
    Inventors: Akihiro Horibe, Hidetoshi Numata
  • Patent number: 10107966
    Abstract: A method of fabricating a polymer waveguide (PWG) is presented. The method includes preparing a polymer waveguide (PWG) sheet having a surface with partially exposed cores and partially exposed cladding, the cladding covering the cores and preparing a first dicing tape, the first dicing tape being an ultraviolet (UV) cut type dicing tape defining separation lines on a back side thereof. The method further includes placing the partially exposed cores of the PWG sheet on the first dicing tape to prevent the surface of the PWG sheet from atmospheric contaminations and placing a tape side of the first dicing tape attached to the PWG sheet on a second dicing tape.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: October 23, 2018
    Assignee: International Business Machines Corporation
    Inventors: Akihiro Horibe, Hidetoshi Numata
  • Patent number: 9772450
    Abstract: A passive optical fiber switch includes: a housing defining a plurality of ports configured to receive fiber optic connectors; a substrate positioned within the housing, the substrate defining a plurality of waveguide paths; and an arm positioned relative to one of the plurality of ports such that the arm moves as a fiber optic connector is positioned in the one port, movement of the arm causing the waveguide paths to shift to break a normal through configuration.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: September 26, 2017
    Assignee: CommScope Technologies LLC
    Inventors: Paul John Pepe, Joseph C. Coffey
  • Patent number: 9761756
    Abstract: An optical device comprising: a photonic crystal structure, comprising: a layer of a first material, the layer comprising a quantum emitter; and a plurality of regions of a second material in the layer of the first material, the regions arranged in a regular lattice having at least one region missing from the lattice so that a defect is formed, wherein the quantum emitter is located in the defect part of the photonic crystal structure; wherein the second material has a different refractive index to the first material; and an electrode which is electrically contacted to only the defect part of the photonic crystal structure.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: September 12, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Sokratis Kalliakos, Joanna Krystyna Skiba-Szymanska, David Julian Peter Ellis, Andrew James Shields
  • Patent number: 9739657
    Abstract: An optical sensor and an electronic device having an optical sensor. The optical sensor includes: an optical waveguide containing a photochromic material; a light emitter that emits visible light to be incident on the optical waveguide; and a light receiver that detects the visible light emitted from the light emitter and progressing through the optical waveguide. A transmittance of the optical waveguide in relation to the visible light may be changed by the photochromic material as the optical waveguide is exposed to UV light. The optical sensor and the electronic device having the same may be variously implemented according to exemplary embodiments.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: August 22, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Seong-Je Cho, Kwang-Bok Kim, Jae-Geol Cho, Jae-Hong Kim, Sun-Tae Jung, Chul-Ho Cho
  • 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: 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
  • Patent number: 8478088
    Abstract: The object is to provide an optical switch capable of efficient operation and a manufacturing method thereof. The optical switch according to the present invention is a Mach-Zehnder interferometer type optical switch composed of a line defect waveguide of a photonic crystal. Further, the optical switch according to the present invention includes two directional couplers 20 and 23, and two paths of waveguides 30 and 32 therebetween. Furthermore, between the two paths, group velocity of guided light differs in the first path waveguide 20 and the second path waveguide 32.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: July 2, 2013
    Assignee: NEC Corporation
    Inventor: Masatoshi Tokushima
  • Publication number: 20130156417
    Abstract: An optical fiber transmission switching device includes a first transmission port; a second transmission port; a terminal-end input port; a terminal-end output port; a first and a second optical module respectively including an electrical input port, an electrical output port, and a bi-directional optical port, wherein the two bi-directional optical ports are coupled to the first and the second transmission port respectively; a first and a second laser driver circuit respectively coupled to the first and the second optical module; a first and a second electrical amplifier respectively coupled to the first and the second optical module; a first switching module coupled to the terminal-end input port and the first and the second laser driver circuit; a second switching module coupled to the first and the second electrical amplifier and the terminal-end output port.
    Type: Application
    Filed: November 30, 2012
    Publication date: June 20, 2013
    Inventors: Hui Tsuo Chou, John Lynn
  • Patent number: 8131124
    Abstract: Optical guided mode fast 1×2 and 2×2 spatial switches are provided that can be used in multimedia communication networks. These switches require a relative refractive index change of only 0.0001˜0.0002 and can be realized using Lithium Niobate, Polymers, semiconductors, etc. Extinction ratios of these switches are made to be better than 45 dB, by introductions of a rear edge adjusted broken electrode and a blocker electrode into their architecture. Optical losses are less than 3 dB, and excellent switching characteristics are achieved by suppressing cross talk to ˜50 dB. The two output ports of the 1×2 (2×2) switch are made to be spatially perpendicular (in opposition) by introduction of air grooves, allowing for two-dimensional integration of unit switches into matrices. System applications of the switch are made flexible due to a discrete drive requirement for each optical input to the 2×2 switch.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: March 6, 2012
    Inventor: Jamshid Nayyer
  • Patent number: 7899296
    Abstract: An optical fiber reel storing a plurality of optical fibers having an annular frame; a first reel portion provided around an radially outer peripheral surface of the annular frame and receiving at least one of the plurality of optical fibers wound up around the radially outer peripheral surface; and, a second reel portion provided radially inside the annular frame and housing at least one of the plurality of optical fiber therein.
    Type: Grant
    Filed: June 20, 2008
    Date of Patent: March 1, 2011
    Assignee: Fujitsu Limited
    Inventors: Norifumi Shukunami, Kazunori Miura, Hiroki Horiuchi
  • Publication number: 20110008000
    Abstract: The object is to provide an optical switch capable of efficient operation and a manufacturing method thereof. The optical switch according to the present invention is a Mach-Zehnder interferometer type optical switch composed of a line defect waveguide of a photonic crystal. Further, the optical switch according to the present invention includes two directional couplers 20 and 23, and two paths of waveguides 30 and 32 therebetween. Furthermore, between the two paths, group velocity of guided light differs in the first path waveguide 20 and the second path waveguide 32.
    Type: Application
    Filed: January 26, 2009
    Publication date: January 13, 2011
    Applicant: NEC CORPORATION
    Inventor: Masatoshi TOKUSHIMA
  • 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: 7700955
    Abstract: A semiconductor device includes a substrate, a semiconductor layer formed on the substrate, and an optically functional portion formed by using at least a portion of the semiconductor layer. The optically functional portion performs light emission or light reception. The semiconductor device further includes a first driving electrode that is electrically connected to a semiconductor layer on a surface of the optically functional portion, and the first driving electrode drives the optically functional portion. The semiconductor device further includes an encapsulating electrode that is formed on the semiconductor layer to surround periphery of the optically functional portion, and electrically connected to the first driving electrode.
    Type: Grant
    Filed: November 6, 2007
    Date of Patent: April 20, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yasuaki Kuwata, Hideo Nakayama, Ryoji Ishii, Kayoko Nakamura
  • 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: 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: 7616847
    Abstract: Optical dispersion compensation (ODC) devices are disclosed. In one aspect, an ODC device may include first and second groups of optical resonator devices coupled together to compensate for optical dispersion by collectively delaying light. The first group of optical resonator devices may have a first group delay curve with a convex shape between peaks in frequency. The second group of optical resonator devices may have a second group delay curve with a concave shape at a peak in frequency. The ODC device may also include one or more thermal devices to change the temperature of the first group of optical resonator devices as a group, and one or more additional thermal devices to change the temperature of the second group of optical resonator devices as a group. Methods of making and using the ODC devices are also disclosed, as well as various systems including the ODC devices.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: November 10, 2009
    Assignee: Intel Corporation
    Inventor: Andrew Daiber
  • 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: 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
  • 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: 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
  • Publication number: 20080144995
    Abstract: A optical switch and switching system is provided for effecting a switchover from a first optical fiber to a second optical fiber includes a first, large scale switching component and a second, small scale switching component. The first, large scale switching component is configured to establish a cross connect between the second optical fiber and the second, small scale switching component. The second, small scale switching component may then be configured to select the cross connect following establishment of the cross connect, thereby ensuring rapid switchover from the first fiber to the second fiber, regardless of the speed of the first large scale switching component.
    Type: Application
    Filed: December 14, 2006
    Publication date: June 19, 2008
    Applicant: Verizon Services Organization Inc.
    Inventors: Tiejun J. XIA, Glenn A. Wellbrock
  • Patent number: 7362929
    Abstract: An optical switch changes over transmission paths of an optical signal by a refractive index change. The optical switch has an optical waveguide layer having an optical waveguide whose output path of an optical signal branches into two, and reflection diffusing ditches which are provided in a portion outside the optical waveguide in the optical waveguide layer, wherein the portion is closed to a branch portion of the optical waveguides. The reflection diffusing ditches extend in a direction crossing a traveling direction of the optical signal.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: April 22, 2008
    Assignee: Yokogawa Electric Corporation
    Inventors: Shinji Iio, Masayuki Suehiro, Shinichi Nakajima, Yoshiyuki Asano, Chie Sato, Morio Wada, Akira Miura, Tsuyoshi Yakihara, Shinji Kobayashi, Sadaharu Oka, Mamoru Hihara, Katsuya Ikezawa
  • Patent number: 7239770
    Abstract: An optical device enabling reducing device scale is constituted by M circulators (11a, 11b), (M being a natural number), a waveguide-type diffraction grating (12) including M first input/output waveguides (121a, 121b) formed at its one end and M×N second input/output waveguides (125a-1 to 125a-N and 125b-1 to 125b-N) formed at the other end, (N being a natural number), and paths from the M circulators being connected to the M first input/output waveguides; and N reflection-type optical switches (13-1 to 13-N) each for reflecting the optical paths for M adjacent waveguides out of the M×N second input/output waveguides (125a-1 to 125a-N and 125b-1 to 125b-N) and for switching over the returning-destination waveguide respectively, wherein the M circulators, the waveguide-type diffraction grating and N reflection-type optical switches are arranged in cascade. Consequently, the optical device can function preferably also as a wavelength selective optical switch available in a WDM transmission system.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: July 3, 2007
    Assignee: Fujitsu Limited
    Inventors: Koji Terada, Haruhiko Tabuchi, Kohei Shibata, Terukazu Naruse
  • Patent number: 7215853
    Abstract: A collimator 111 for an input light, a collimator 112 for an output light, a collimator 113 for a branched light, a collimator 114 for an inserted light and a wavelength selecting filter 115 are provided on a common substrate 130, and mirrors 121 to 124 for correcting an optical path or prisms XXXX to XXXX capable of producing the same advantages are provided on the optical paths between the collimators 111 to 114 and the wavelength selecting filter 115 respectively. By adjusting the mirrors or prisms, the shift of the optical axis between the collimators is corrected.
    Type: Grant
    Filed: August 15, 2003
    Date of Patent: May 8, 2007
    Assignee: Hoya Corporation
    Inventors: Kiyoshi Morita, Tetsuo Takano, Yoshiatsu Yokoo
  • Patent number: 7212696
    Abstract: An optical fiber wound onto an exterior surface of a composite structure in a two-dimensional pattern and adhered thereto to detect damage to the structure caused by impacts to or handling of the composite structure.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: May 1, 2007
    Assignee: The Boeing Company
    Inventors: Thomas L. Andrews, Lorie R. Grimes-Ledesma
  • Patent number: 7167609
    Abstract: An optical switch has an input port, output ports, optical waveguides whose output path of an optical signal branch into two. A first stage optical switch section is provided in a branching portion of the optical waveguide, which switches a propagating path of an optical signal to a path leading to the desired output port. A subsequent stage optical switch section is provided in a branching portion of the optical waveguide subsequent to the first stage optical switch section, which switches a propagating path of a leakage light, which is leaked from the first stage optical switch section, to a path which does not propagates the leakage light to any of the output ports. The first stage optical switch section and the subsequent stage optical switch section switch a path of an optical signal according to a refractive index change caused by a carrier injection.
    Type: Grant
    Filed: October 7, 2005
    Date of Patent: January 23, 2007
    Assignee: Yokogawa Electric Corporation
    Inventors: Masayuki Suehiro, Shinji Iio, Shinichi Nakajima, Yoshiyuki Asano, Morio Wada, Akira Miura, Katsuya Ikezawa
  • Patent number: 7164817
    Abstract: As a wavelength selection filter, a filter in which dielectric multilayered films are formed on a substrate, an optical fiber grating in which diffraction grating is formed in an optical fiber, and so on, can be used. As another optical demultiplexer 33, as described in Japanese Patent No. 2599876, an arrayed optical waveguide diffraction grating which forms plural optical waveguides having different length of optical paths on the substrate to demultiplex the multiple wavelength light to the respective wavelengths can be used.
    Type: Grant
    Filed: May 22, 2003
    Date of Patent: January 16, 2007
    Assignee: Hoya Corporation
    Inventors: Kaoru Kagami, Hidekuni Asai, Yoshiatsu Yokoo
  • Patent number: 7082233
    Abstract: An optical switch includes a film consisting of a polymer, a keep plate having a switching through hole and a driver. The film has a core linearly extending therein and a notch extending across a switching portion located halfway in the core. The keep plate holds the film to expose the switching portion at the through hole. The driver is employed for narrowing and separating a gap of the notch, thereby selecting a route of light. The notch is formed by precedently forming a starting groove on the surface of the film and pressing the switching portion with a pressing member from the backside of the starting groove while holding the film with the keep plate thereby causing cleavage.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: July 25, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takeshi Saito, Seiichiro Tabata, Tatsuo Hatta
  • Patent number: 7054519
    Abstract: Described are various optical, opto-electrical and electrical components and subsystems. Some embodiments include input and output waveguides supporting opposing facets separated by a gap. The degree to which the opposing facets are aligned with respect to one another controls the light intensity in the output waveguide. An active closed-loop control mechanism dynamically controls the extent of waveguide alignment to maintain a desired output intensity. In other embodiments, the path between opposing facets can be selectively blocked by a micro blade. Still other embodiments combine switching with optical power equalization for ease of integration.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: May 30, 2006
    Assignee: Active Optical Networks, Inc.
    Inventor: Vlad Novotny
  • Patent number: 7046872
    Abstract: This two input two output type optical switch includes four one input two output type optical switches which are arranged to oppose one another, each of these one input two output type optical switches including a Y branch portion in which one optical waveguide is branched into two optical waveguides. And two refractive index adjustment means are provided in the vicinity of each Y branch portion. Switching over of the optical path is performed by half of the refractive index adjustment means functioning alternately. Moreover, a light output intensity variable attenuation function which attenuates by any desired amount the intensity of the light which is being outputted is implemented, at some input port and/or output port, by operating at least one of the refractive index adjustment means which is not currently being used for switching over of the optical path.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: May 16, 2006
    Assignee: Fujikura Ltd.
    Inventors: Ken Sakuma, Daigo Fujita, Hirokuni Ogawa, Koji Omichi, Hideyuki Hosoya
  • Patent number: 7035500
    Abstract: The present invention relates to device for space selective switching of an optical signal from an input access waveguide to a first selected output access waveguide. Said device comprising a multi-mode interference (MMI) waveguide having at a first side a number, N, of accesses for connection of access waveguides. Said MMI waveguide having a length, in light propagating direction, so that an image at the i:th, i?N access waveguide propagating into said MMI waveguide will produce N self-images at a second side opposite to said first side, where N is an integer than 1. Said device further comprises reflective means located in said MMI waveguide close to said second side, arranged to reflect said N self-images towards said first side of said MMI waveguide, and means, arranged at said second side, for adjusting the phase of each of said self-images to create a single self-image at said selected output access waveguide.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: April 25, 2006
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Torsten Augustsson
  • Patent number: 7031574
    Abstract: A plug in communications module for achieving bi-directional communication along a single fiber-optic cable in a fiber-optic network. The plug in module is made such that it plugs directly into fiber-optic communication equipment of standard form factors. Bi-directional communication is achieved by using a low-cost circulator. The plug in module also has a receptacle that is used for attaching a patch cable between the fiber-optic network in the plug in module.
    Type: Grant
    Filed: July 21, 2003
    Date of Patent: April 18, 2006
    Assignee: Finisar Corporation
    Inventors: Yonglin Huang, Qi Deng, Robert Huang, Liren Du, Steve Wang
  • Patent number: 7020168
    Abstract: A high power multi-frequency laser includes a laser cavity defined by reflective elements, a frequency routing device in the cavity comprising a plurality of frequency selective pathways, a first set of optical amplifiers optically coupled to a first end of the frequency routing device, and a second set of optical amplifiers optically coupling a second end of the frequency routing device and a first one of the reflective elements. The high power multi-frequency laser further includes a power combiner. The power combiner is optically coupled to the first set of optical amplifiers and a second one of the reflective elements and combines the outputs of the first set of optical amplifiers such that a common output for the multi-frequency laser is provided. The common output of the present invention provides a single output from the multi-frequency laser having a high output coupling efficiency.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: March 28, 2006
    Assignee: Lucent Technologies Inc.
    Inventors: Pietro Arturo Giovanni Bernasconi, Barry Irwin Miller, Nicholas J. Sauer, Lawrence Warren Stulz, Dries Van Thourhout, Weiguo Yang, Liming Zhang
  • Patent number: 7013061
    Abstract: A 2×2 optical switching apparatus using photonic crystal structures has a compact, simple structure and includes an optical-guide module having first, second, third and fourth waveguides, the first and second waveguides guiding a first optical signal of a first input port to a first and a second output port, respectively, the third and fourth waveguides guiding a second optical signal of a second input port to the second and the first output ports, respectively, and formed with photonic crystals having a complete photonic bandgap for a wavelength range of the first and second optical signals, and a switching control section controlling the first and second optical signals to be respectively guided through either a first/third waveguide route or a second/fourth waveguide route according to a route-selecting-control signal inputted from outside. The 2×2 optical switching apparatus has no mechanical motion, little polarization dependence and may be efficiently used in optical networks.
    Type: Grant
    Filed: November 17, 2003
    Date of Patent: March 14, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hong-seok Lee, Suk-han Lee, Ji-deog Kim, Il-kwon Moon
  • Patent number: 6993219
    Abstract: A waveguide/MEMS switch adapted to redirect optical signals between output ports based on a phase shift change generated by motion of one or more movable MEMS mirrors incorporated therein. Advantageously, such a switch has a relatively high switching speed and low power consumption. A switch according to one embodiment of the invention includes a planar waveguide device and a planar MEMS device. The MEMS device implements in-plane (i.e., parallel to the plane of that device) translation of the mirrors. As a result, in certain embodiments of the switch, the waveguide and MEMS devices are connected into a compact planar assembly.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: January 31, 2006
    Assignee: Lucent Technologies Inc.
    Inventors: Vladimir A. Aksyuk, Ho Bun Chan, Dan Fuchs, Dennis S. Greywall, Maria E. Simon
  • Patent number: 6990267
    Abstract: A moving fiber optical switch of the type having two opposed supports carrying optical fibers with a gap between the fiber ends, with at least one of the supports being flexibly mounted for pivotal movement relative to the other support, and in which: (1) an actuator means, which provides pivotal movement of one or both supports between two orientations corresponding to first and second relative positions of the fiber supports, is connected to a connecting member or housing by means of a flexure; (2) the switch has means for adjusting the length of the gap between the fiber ends; and (3) the switch has means for adjusting the alignment of the optical fiber ends in a direction perpendicular to the movement provided by the pivotal movement of the flexibly mounted support or supports.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: January 24, 2006
    Assignee: Luminos Industries Ltd.
    Inventors: Murray R. Harman, Stephen G. Harman
  • Patent number: 6973238
    Abstract: A directional coupler type optical modulator with traveling-wave electrodes includes a first directional coupler region, a waveguide wave coupling region, a second directional coupler region, and a set of noncrossing traveling-wave electrodes disposed along the outside of the waveguides. The electrodes of each directional coupler are connected to the traveling-wave electrodes via air-bridges. The waveguide structures are of the P-I-N type having a common N-type conducting layer which provides delta-beta operation of the directional coupler, and both cross and bar states are controlled by a single input signal.
    Type: Grant
    Filed: September 5, 2003
    Date of Patent: December 6, 2005
    Assignee: Fibest, Ltd.
    Inventors: Haruhisa Soda, Shigeru Nakagawa
  • Patent number: 6968100
    Abstract: An optical micro-electro-mechanical system (MEMS) switch is disclosed. In a preferred embodiment the optical MEMS switch is used as an M×N optical signal switching system. The optical MEMS switch comprises a plurality of optical waveguides formed on a shuttle for switching optical states wherein the state of the optical switch is changed by a system of drive and latch actuators. The optical MEMS switch utilizes a latching mechanism in association with a thermal drive actuator for aligning the waveguide shuttle. In use the optical MEMS switch may be integrated with other optical components to form planar light circuits (PLCs). When switches and PLCs are integrated together on a silicon chip, compact higher functionality devices, such as Reconfigurable Optical Add-Drop Multiplexers (ROADMs), may be fabricated.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: November 22, 2005
    Assignee: Xerox Corporation
    Inventors: Joel A. Kubby, Kathleen A. Feinberg, Kristine A. German, Peter M. Gulvin, Jun Ma, Pinyen Lin
  • Patent number: 6968099
    Abstract: An optical switch (10) includes a housing (3), an input port (4), an output port (5), a switching element (6), a holder (7), and a driver (63). The holder holds the input and output ports in alignment with one another and is assembled with the switching element. The switching element includes an optical component assembly (61) and a rotating mechanism (60). The optical component assembly is fixed on the rotating mechanism and is brought to move between a top stopper (85) (an upward position), wherein the optical component assembly is out of optical paths running between the input port and the output port, and a bottom stopper (86) (a downward position), wherein the optical component assembly is in the optical paths. The optical component assembly includes a prism (612), which redirects optical paths passing through it, thereby effecting switching between the input and output ports.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: November 22, 2005
    Assignee: Hon Hai Precision Ind. Co., Ltd.
    Inventors: Chien Cheng Chen, Kun-Tsan Wu
  • Patent number: 6947220
    Abstract: Devices and methods for information processing in optical communications are provided. In its simplest embodiments, collimated light (1) passes through a non-grating diffractive structure (2) and a lens (3). The light is spatially processed in the focal plane (4) of the lens (3). Thereafter, the light can, for example, be coupled into a fiber or detector array (5).
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: September 20, 2005
    Assignee: KSM Associates, Inc.
    Inventor: Yakov G. Soskind
  • Patent number: 6931172
    Abstract: An optical switch 1 has a plane waveguide 2 provided with optical waveguide 3, and an actuator structure 5 including a beamlike member 6 supported in a doubly supported manner on the plane waveguide 2. A mirror 10 for shutting out light passing on the optical waveguide 3 is provided in the central region of the beamlike member 6. Interconnecting members 12 extending in the longitudinal direction of the beamlike member 6 are coupled to the both ends of the beamlike member 6. The interconnecting members 12 preliminarily exert a compressive force on the beamlike member 6 so as to deflect the beamlike member 6 with compression stress in an initial state in which the mirror 10 is located at a position where the mirror allows the light passing on the optical waveguide 3 to pass or at a position where the mirror shuts out the light passing on the optical waveguide 3.
    Type: Grant
    Filed: August 8, 2003
    Date of Patent: August 16, 2005
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takahiro Sunaga, Makoto Katayama, Tomohiko Kanie
  • Patent number: 6924082
    Abstract: The present application describes a method for information storage and data processing comprising the steps of thermo inducing or photo inducing double-bond shifts (DBS) in substituted (4n)-annulenes thus generating transitions between two different conjugation states with at least one substituent. The two different conjugation states are the conjugation on-state and conjugation off-state of the annulene core ?-electrons with the substituent ?-electrons. The present invention is furthermore related to novel substituted (4n)-heptalenes being optically and/or thermally switchable, based on thermal or photochemical double-bond shifts (DBS) as well as methods for their preparation. The (4n)-heptalenes can be used for information storage and data processing devices.
    Type: Grant
    Filed: December 10, 1996
    Date of Patent: August 2, 2005
    Assignee: Ciba Specialty Chemicals Corporation
    Inventor: Hans-Jürgen Hansen
  • Patent number: 6912337
    Abstract: A network healing smart fiber optic switch for fast, automatic switching between multiple paths of an optical transmission line with minimal disruption. The network healing smart fiber optic switch feeds each of multiple fiber optic inputs to a splitter. One of the outputs of the splitters go to an optical switch, which selects the optical signal to send to the output based on a control signal from a controller or analog selection circuit. The other outputs of the splitters go to the analog selection circuit, which outputs a control signal to the optical switch. The analog selection circuit compares the primary optical signal to a selected setpoint to determine the signal's validity. The analog selection circuit routes an alternate, or secondary, optical signal upon failure of the primary optical signal. After the primary signal is restored and valid for a specified period, the analog selection circuit deselects the secondary optical signal and routes the primary optical signal.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: June 28, 2005
    Assignee: Neptec Optical Solutions, Inc.
    Inventors: John Carberry, Michael L. Smith, Richard Racinskas
  • Patent number: 6909820
    Abstract: A planar 2×2 switch is provided for controllably coupling first and second input channels to first and second output channels. The switch includes a first reflector that is movable between a first position and a second position. When the first reflector is in its second position, it reflects light from the first input channel to the second output channel and reflects light from the second input channel to the first output channel. When the first reflection is in its first position, it does not affect the optical beams in the switch. Instead, these beams are reflected by a second reflector which has two reflective surfaces. The second reflector reflects light from the first input channel to the first output channel and reflects light from the second input channel to the second output channel. Switches having a larger number of input and output channels are also provided.
    Type: Grant
    Filed: November 6, 2002
    Date of Patent: June 21, 2005
    Assignee: Rainbow Communications, Inc.
    Inventors: Wei Qiu, Zhanxiang Zhang, Jianmin Gao, Dong Xu