Input/output Coupler Patents (Class 385/31)
  • Patent number: 8519325
    Abstract: The present invention provides a spectrally selective planar optical radiation concentrator, in which different spectral components of solar energy can be collected for different applications such as heat, illumination and electricity. The optical radiation concentrator has two basic components, an angle selective optical filter and a light redistribution reflector for collecting, trapping and concentrating radiant energy. It further comprises a light deflecting component and a fluorescent wavelength shifter to improve acceptance angle and concentration efficiency respectively. The planar optical radiation concentrator exhibits the potential for light weight, high concentration ratio and efficiency, and the ability for passive tracking.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: August 27, 2013
    Inventors: Zhenyu Lu, Jingfeng Yuan
  • Patent number: 8521023
    Abstract: A communication network is described in which a number of computing nodes are situated in a logical multidimensional array and are linked by communication cables. The communication cables carry conduits connecting each node with all other nodes in the array so that a direct physical connection exists between every pair of computing nodes in the array. A method of providing interconnection among nodes in a communication network comprises arranging and connecting computing nodes in an array as described above, where each node passively redirects conduits to columns and rows in the array.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: August 27, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Pavel Kornilovich
  • Patent number: 8520990
    Abstract: The present invention provides improved collimating lens assemblies (32) which include: a singlemode fiber (38) terminating in a distal end; a step-index multimode fiber (44) having a proximal end abutting to the singlemode fiber distal end, and having a distal end; a graded-index multimode fiber (45) having a proximal end abutting the step-index multimode fiber distal end, and having a distal end; and a collimating lens (34) longitudinally spaced from the graded-index multimode fiber distal end by an intermediate air gap (43), and operatively arranged to collimate light rays emanating from the graded-index multimode fiber distal end. The improved collimating lens assembly is characterized by the fact that there is no epoxy, silicone gel or index-matching material between the graded-index multimode fiber distal end and the collimating lens.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: August 27, 2013
    Assignee: Moog Inc.
    Inventors: Norris E. Lewis, Martin J. Oosterhuis, K. Peter Lo
  • Publication number: 20130216182
    Abstract: An optical light guide coupler for coupling at least two light guides comprises an input face and an output face, wherein the optical light guide coupler is configured to receive light from a first light guide having a stepped output profile and is configured to transmit that light to a second light guide having a non-stepped profile. The input face of the light guide coupler is registered to the stepped output profile of the first light guide and the output face of the light guide coupler is at least one of rectilinear and curved.
    Type: Application
    Filed: February 14, 2013
    Publication date: August 22, 2013
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventor: 3M INNOVATIVE PROPERTIES COMPANY
  • Publication number: 20130215495
    Abstract: A nanoparticle waveguide apparatus, a nanoparticle waveguide photonic system and a method of photonic transmission employ a nearfield-coupled nanoparticle (NCN) waveguide to cooperatively propagate an optical signal. The nanoparticle waveguide apparatus includes a first optical waveguide adjacent to a second optical waveguide, the first optical waveguide comprising an NCN waveguide having a plurality of nanoparticles. The nanoparticle waveguide photonic system further includes a nearfield coupling (NC) modulator. The method includes providing the NCN waveguides and modulating a coupling between one or both of first and second NCN waveguides and adjacent nanoparticles within one or both of the first and second NCN waveguides.
    Type: Application
    Filed: October 29, 2010
    Publication date: August 22, 2013
    Inventors: Lars H. Thylen, Alexandre M. Bratkovski, Petter Holmstrom
  • Patent number: 8515222
    Abstract: Methods and apparatus for a fiber optic display screen of adjustable size. In one embodiment, a screen comprises: a plurality of pixels formed by a terminal end of at least one optical fiber, wherein the pixels are substantially equidistant from each other along a first axis in a first screen size and in a second screen size that is larger than the first size.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: August 20, 2013
    Assignee: Raytheon Company
    Inventors: William J. Cottrell, Nathan G. Kennedy
  • Patent number: 8515216
    Abstract: Disclosed is a system including an integrated silicon-based structure including a microcavity configured to receive optical energy from an input beam carrying an optical signal and absorb the optical energy by a nonlinear multi-photon absorption process. For example, the multi-photon absorption process can be two-photon absorption (TPA). The integrated silicon-based structure further includes electrodes responsive to the nonlinear multi-photon absorption process in the microcavity for producing an electronic signal indicative of the optical signal. A related method is also disclosed.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: August 20, 2013
    Assignee: Massachusetts Institute of Technology
    Inventors: Jorge Bravo Abad, Erich P. Ippen, Marin Soljacic
  • Patent number: 8515221
    Abstract: An optical probe for emitting and/or receiving light within a body comprises an optical fiber that transmits and/or receives an optical signal, a silicon optical bench including a fiber groove running longitudinally that holds an optical fiber termination of the optical fiber and a reflecting surface that optically couples an endface of the optical fiber termination to a lateral side of the optical bench. The fiber groove is fabricated using silicon anisotropic etching techniques. Some examples use a housing around the optical bench that is fabricated using LIGA or other electroforming technology. A method for forming lens structure is also described that comprises forming a refractive lens in a first layer of a composite wafer material, such as SOI (silicon on insulator) wafers and forming an optical port through a backside of the composite wafer material along an optical axis of the refractive lens. the refractive lens is preferably formed using grey-scale lithography and dry etching the first layer.
    Type: Grant
    Filed: January 25, 2010
    Date of Patent: August 20, 2013
    Assignee: Axsun Technologies, Inc.
    Inventors: Dale C. Flanders, James W. Getz, Walid A. Atia, Peter S. Whitney, Mark E. Kuznetsov
  • Patent number: 8515226
    Abstract: This disclosure describes a device that belongs to the field of optical devices. More specifically it is a novel way of achieving light splitting or combining using a spherical reflector with a single input and multiple outputs, or multiple inputs and a single output.
    Type: Grant
    Filed: January 18, 2011
    Date of Patent: August 20, 2013
    Assignee: Ocean Optics, Inc.
    Inventor: Andrew Tatsch
  • Patent number: 8509579
    Abstract: A multiplicity of Fresnel lenses are attached to tubular branches of a tree-like support structure. Fiber optic bundles are connected to the Fresnel lenses and routed inside the tubular branches and collected as a larger fiber optic bundle inside a main trunk structure to which each of the branches is connected. The larger fiber optic bundle may be connected to a remotely located power generating plant or other processing facility via a fiber optic transmission network. A domed solar energy collector includes an outer dome and one or more inner domes concentrically nested therewith, one or more Fresnel lenses being positioned on the hemispherical surface of each of the outer and inner domes to thereby multiply the solar energy focused through each of the domes to a collection area within the innermost dome.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: August 13, 2013
    Inventor: Fernando Ramon Martin-Lopez
  • Patent number: 8508843
    Abstract: A laser amplifier includes a pump source and an optically active fiber having an input portion configured to receive a signal source and an output portion. The pump source is optically coupled to the optically active fiber. The laser amplifier also includes an output fiber optically coupled to the output portion of the optically active fiber. The output fiber includes a rare-earth element. The laser amplifier further includes a beam expansion section joined to the output fiber.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: August 13, 2013
    Assignee: Electro Scientific Industries, Inc.
    Inventors: Richard Murison, Tullio Panarello
  • Patent number: 8503838
    Abstract: A two-part optical coupling system is provided for use in an optical transmitter (TX) module. The two-part optical coupling system has first and second optical parts and an air gap at the interface between the two optical parts. A portion of the light produced by a laser diode of the optical TX module is refracted at the air gap and is coupled by the optical coupling system into an end of an optical fiber. A second portion of the light produced by the laser diode is reflected by the air gap and is coupled by the optical coupling system onto a monitor photodiode of the optical TX. The electrical signal produced by the monitor photodiode may be used to monitor and adjust the optical output power level of the laser diode. Because the air gap is formed at the interface between the first and second optical parts, the process of forming the air gap can be incorporated into the optical coupling system manufacturing process without increasing the cost of the manufacturing process.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: August 6, 2013
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventor: Ye Chen
  • Patent number: 8503841
    Abstract: The invention relates to a device for coupling an optical fiber and a nanophotonic component formed on a first substrate, wherein the device comprises: an intermediate component formed on a second substrate including a first wave guide adapted for receiving light from the optical fiber and for transmitting the same to a first diffraction grating independently from the polarization of the incident light; second and third diffraction gratings formed on the first substrate and coupled to the nanophotonic component, the first diffraction grating being adapted to provide the first and second light beams respectively towards the second diffraction grating and the third diffraction grating, the first and second beams having perpendicular polarizations.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: August 6, 2013
    Assignee: Commissariat a l'Energie Atomique et aux Energies Alternatives
    Inventors: Christophe Kopp, Badhise Ben Bakir, Stéphane Bernabe
  • Patent number: 8503837
    Abstract: A device for the positioning of fiber optic output including a base having a hole disposed at a midpoint thereof, a collar having an opening at a midpoint, a plurality of bimorph actuators, each actuator connected to an outer side surface of the base and located at opposite ends, a plurality of flexible beams, each having a first end connected to the collar and a second end connected to a bimorph actuator, a flexible tube inserted in the hole, where a bottom end of the tube is cantilevered at a bottom of the base and a top end of the tube is inserted in the opening of the collar, and a fiber optic embedded in the flexible tube.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: August 6, 2013
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Leonid A. Beresnev, Mikhail A. Vorontsov
  • Patent number: 8503839
    Abstract: A waveguide cores consisting of a subwavelength grating permits transmission of light without diffraction in a discontinuous manner, wherein the energy is provided by field hopping between subwavelength material segments of higher index. The use of alternating segments permits design of waveguides having desired effective index, mode confinement factor, birefringence, polarization mode or mode dispersions, polarization dependent loss, thermal sensitivity, or nonlinear optical coefficient. An optical system comprises a waveguide having such a core, clad on at least one side, extending between two ends, and wavelength-limiting optical components in optical communication with the ends.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: August 6, 2013
    Assignee: National Research Council of Canada
    Inventors: Pavel Cheben, Przemek J. Bock, Jens H. Schmid, Dan-Xia Xu, Adam Densmore, Siegfried Janz
  • Patent number: 8503835
    Abstract: The optical coupler module for converting and transmitting electrical/optical signals includes a semiconductor substrate, a first film, a second film, an electrical transmission unit, at least one signal conversion unit and an optical waveguide structure. The first film and the second film are formed on opposite surfaces of the semiconductor substrate. The signal conversion unit and the optical waveguide structure are disposed on opposite sides of the semiconductor substrate. The optical waveguide structure has a reflector and a waveguide body. The optical signal generated from the signal conversion unit sequentially passes the first film, the semiconductor substrate and the second film and enters the optical waveguide structure. Then, the optical signal is reflected by the reflector and transmitted in the waveguide body to be outputted. Alternatively, the optical signal is transmitted in a reverse direction from the optical waveguide structure to the signal conversion unit.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: August 6, 2013
    Assignee: National Central University
    Inventors: Mao-Jen Wu, Hsiao-Chin Lan, Yun-Chih Lee, Chia-Chi Chang, Hsu-Liang Hsiao, Chin-Ta Chen, Bo-Kuan Shen, Guan-Fu Lu, Yan-Chong Chang, Jen-Yu Chang
  • Patent number: 8498504
    Abstract: An integrated optical transmission board in accordance with one embodiment of the invention includes: a first optical transmission board having a first optical transmission line; a second optical transmission board having a second optical transmission line; and an optical coupling structure which is disposed between the first optical transmission board and the second optical transmission board and has a third optical transmission line for providing optical connection between the first optical transmission line and the second optical transmission line. The first optical transmission board further has a first engagement portion provided in an area thereof opposed to the optical coupling structure. The optical coupling structure further has a second engagement portion provided in an area thereof opposed to the first optical transmission board so as to make engagement with the first engagement portion.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: July 30, 2013
    Assignee: Kyocera Corporation
    Inventors: Takahiro Matsubara, Keiko Oda
  • Patent number: 8498505
    Abstract: A light guide apparatus includes a light guide layer further including light injection elements and respective light bypass elements disposed optically upstream of the light injection elements. The light injection elements and/or the bypass elements can take the form of injection facets (air prisms), surface diffraction elements, volume diffraction elements, and gradient index profiles. A light collection and concentration system comprises a single light guide apparatus, a light-transmitting medium layer disposed immediately adjacent the single light guide apparatus, and a primary light concentrator component disposed adjacent the light-transmitting medium layer, including a plurality of primary concentrator elements each of which is in optical registration with a respective one of the light injection elements of the single light guide apparatus.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: July 30, 2013
    Assignee: University of Rochester
    Inventors: Duncan T. Moore, Greg R. Schmidt, Blair L. Unger
  • Publication number: 20130188971
    Abstract: A polarization-insensitive optical receiver for demodulating a phase-modulated input optical signal is provided. The optical receiver includes successively a polarization splitter, a first and second interferometric modules including respective delay lines, and a plurality of detectors. The input optical signal is split into two substantially orthogonally-polarized components, which are launched along respective optical paths into the corresponding interferometric modules where they demodulated and subsequently recombined prior to being detected by the plurality of detectors. Advantageously, the optical receiver allows mitigating undesired discrepancies between the optical paths traveled by the two polarization components by arranging the respective delay lines of the interferometric modules into intertwined spiraling structures.
    Type: Application
    Filed: January 18, 2013
    Publication date: July 25, 2013
    Applicant: TERAXION, INC.
    Inventor: TERAXION, INC.
  • Patent number: 8488935
    Abstract: It is determined that service is to be disconnected for at least a first subscriber of a video content network employing at least one fiber optic cable. The service to the at least first subscriber is provided from a cross-connect cabinet, over the at least one fiber optic cable, to a premises of the at least first subscriber. Sufficient macro-bending loss is induced in the at least one fiber optic cable so as to cause a signal-to-noise ratio at the premises to degrade such that the service is disconnected. The macro-bending loss is induced in a portion of the at least one fiber optic cable which services only the first subscriber. The macro-bending loss can be induced, for example, by winding about a single mandrel, two mandrels in a figure eight pattern, in a tortuous groove in a tray, and so on.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: July 16, 2013
    Assignee: Time Warner Cable Enterprises LLC
    Inventor: Paul D. Brooks
  • Patent number: 8488924
    Abstract: An optical waveguide and a bi-directional transceiver are provided. A single mode optical fiber has one end coupled to one end of a hollow optical fiber and an opposite end having a slope plane, thereby separating optical signals travelling in opposite directions from each other. Manual alignment for an optical system is easily realized without the need for additional optical elements, so that the light transmission/reception performance of the optical waveguide is improved and the structure of the optical waveguide is smaller.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: July 16, 2013
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sei-Hyoung Lee, Hyun-Seo Kang, Jai-Sang Koh
  • Patent number: 8488925
    Abstract: An optical fiber coupler is formed of a section of optical fiber that is positioned between a conventional input fiber (for example, a single mode fiber) or waveguide and a coiled optical fiber device. The adiabatic coupler is coiled (or, at least, curved) to assist in transforming a conventional fundamental mode optical signal propagating along the longitudinal axis of the input fiber to an optical signal that is shifted into a peripheral region of the coiled optical fiber. Moreover, the pitch of an inventive coiled optical fiber coupler can be controlled to assist in the adiabatic transformation process.
    Type: Grant
    Filed: August 9, 2012
    Date of Patent: July 16, 2013
    Assignee: OFS Fitel, LLC
    Inventor: Mikhail Sumetsky
  • Patent number: 8483521
    Abstract: Disclosed are resonant optical modulators, and methods of use thereof, that achieve constant photon populations in the resonator by simultaneously modulating at least two variable modulation parameters.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: July 9, 2013
    Assignee: Massachusetts Institute of Technology
    Inventor: Milos Popovic
  • Patent number: 8483526
    Abstract: An innovative micro-size photonic switch is presented. The photonic switch is comprised of: a mirror having a reflecting surface; an input waveguide; and an output tapered waveguide structure. The photonic switch further includes a switching mechanism disposed adjacent to the reflecting surface and operable to change the refractive index along the reflective surface and thereby shift the angle at which the optical signal reflects from the mirror. More specifically, the switching mechanism may operate to change concentration of free carrier distribution along the reflective surface and thereby displace the effective reflecting interface of the mirror. In this way, the optical signal can be directed to one of two or more output ports of the output tapered waveguide structure and finally exited by one output waveguide channel that is connected to the selected port of the output tapered waveguide structure.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: July 9, 2013
    Assignee: University of Ottawa
    Inventors: DeGui Sun, Trevor Hall
  • Patent number: 8478093
    Abstract: A multimode interference coupler includes at least one supply waveguide and at least one output waveguide, wherein the coupler has along its longitudinal extent in the direction of the supply waveguide at least one longitudinal section in which the refractive index has a locally oscillating profile in a direction running substantially at right angles to the direction of the supply waveguide. A method for the structural configuration of such a multimode interference coupler.
    Type: Grant
    Filed: August 28, 2009
    Date of Patent: July 2, 2013
    Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
    Inventors: Reinhard Kunkel, Martin Schell, Inigo Molina-Fernandez, Gonzalo Wangümert Perez, Alejandro Ortega Monux
  • Patent number: 8478090
    Abstract: A 90-degree optical hybrid interferometer having an optical path length difference to a pair of the optical signal waveguide arm and the local oscillator optical waveguide arm at either the I phase side or the Q phase side at the TE optical signal side and the TM optical signal side respectively thus giving a phase delay to output interference signals of the I phase side and the Q phase side. The 90-degree optical hybrid interferometer has eight output ports arranged in order of Ip, In, Qp, and Qn at both the TE side and the TM side respectively, by setting the output phase difference which is the sum of the phase difference according to the optical path length difference and phase conversion characteristics of each optical coupler at the I phase side and the Q phase side and the phase delay, as +?/2.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: July 2, 2013
    Assignee: NEC Corporation
    Inventor: Shinya Watanabe
  • Patent number: 8472777
    Abstract: This invention relates to an optical fiber access terminal and its terminal parts, specifically to an optical fiber interface protective cap for the terminal body. An optical fiber access terminal includes a terminal body and a protective cap. The terminal body provides an incision from which an optical fiber splice is exposed. The protective cap covering the incision includes a front end, a rear end, an upside, an underside, a right side and a left side portion. The front end portion has a wire outlet through which an optical fiber passes. The rear end portion has an opening receiving the optical fiber splice. The left side portion has a clamping part clamped with the terminal body. The front end, the rear end, the upside, the underside, the right side and the left side portion make a cavity in which the optical fiber and the optical fiber splice are connected.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: June 25, 2013
    Assignee: CIG Shanghai Co., Ltd.
    Inventor: Changjiang Cui
  • Publication number: 20130156372
    Abstract: An optical coupling module includes a substrate, a circuit board defining two through holes, an optical waveguide positioned between the substrate and the circuit board, and an optical assembly. The optical waveguide includes a core and a clad, each core comprises two coupling surfaces corresponding to the two through holes. At least one coupling surfaces is in an arcuate shape. The clad covers the core, except for the two coupling surfaces exposing out of the clad. The optical assembly formed on the circuit board comprises an optical emitting element and an optical receiving element. The optical emitting element and the optical receiving element are positioned above the two through holes, respectively. Light emitted from the optical emitting element enters the optical waveguide via one of the coupling surface, and leaves from another coupling surface to reach the optical receiving element. The coupling surface is capability of focusing light.
    Type: Application
    Filed: April 27, 2012
    Publication date: June 20, 2013
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: BING-HENG LEE
  • Patent number: 8467642
    Abstract: An arrayed waveguide grating optical multiplexer/demultiplexer according to the present invention including an input channel waveguide, an input slab waveguide, an arrayed waveguide, a polarization dependence eliminating means, an output slab waveguide, a temperature compensating means, and an output channel waveguide is characterized in that the temperature compensating means compensates for the temperature dependence of the optical path lengths in the channel waveguides of the arrayed waveguide, and the polarization dependence eliminating means eliminates the temperature dependence and the polarization dependence of the arrayed waveguide grating optical multiplexer/demultiplexer at the same time.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: June 18, 2013
    Assignees: NTT Electronics Corporation, Nippon Telegraph and Telephone Corporation
    Inventors: Daisuke Ogawa, Takashi Saida, Yuji Moriya, Shigeo Nagashima, Yasuyuki Inoue, Shin Kamei
  • Patent number: 8462429
    Abstract: An optical combiner 100 includes: fibers for propagation of pumping light 20 configured to propagate pumping light; a fiber for propagation of laser light 10 configured to propagate laser light having a longer wavelength than the pumping light; and a large area fiber 30 having a core 31 and a clad 32 and configured to propagate laser light and pumping light, in which one end surface of the fiber for propagation of laser light 10 and one end surface of the large area fiber 30 are fused, one end surfaces of the fibers for propagation of pumping light 20 and the one end surface of the large area fiber 30 are fused, and the fiber for propagation of laser light 10 and the fibers for propagation of pumping light 20 are not fused to each other.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: June 11, 2013
    Assignee: Fujikura Ltd.
    Inventor: Hironori Tanaka
  • Patent number: 8461822
    Abstract: A fiber optic current or magnetic field sensor uses a sensing fiber in a coil for measuring a current or a magnetic field and has a retarder for converting between linearly polarized light and elliptically polarized light. The retardation of the retarder, its temperature dependence as well as its azimuth angle in respect to the plane of the fiber coil are optimized in dependence of the birefringence in the sensing fiber in order to minimize the influence of temperature variations and manufacturing tolerances on the overall scale factor of the sensor.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: June 11, 2013
    Assignee: ABB Research Ltd
    Inventors: Robert Wueest, Andreas Frank, Klaus Bohnert
  • Publication number: 20130142481
    Abstract: In various embodiments, an optical fiber includes a core having a relatively large area selected so as to raise a threshold of stimulated Raman scattering or stimulated Brillouin scattering, or both, the core having a high aspect ratio elongated cross-section and having a first refractive index. The core is narrower in a fast-axis direction and wider in a slow-axis direction, such that the fiber is mechanically flexible in the fast-axis direction and is mechanically rigid in the slow-axis direction.
    Type: Application
    Filed: December 1, 2011
    Publication date: June 6, 2013
    Applicant: RAYTHEON COMPANY
    Inventors: David A. ROCKWELL, James Randolph MULROY, Vladimir V. SHKUNOV
  • Patent number: 8457453
    Abstract: Apparatus and methods that compensate for the thermally-induced drift of the resonance frequency of a closed-loop resonator include, in an exemplary embodiment, a waveguide-based Mach-Zehnder interferometer (MZI) and an overcoupled, waveguide-based microring resonator. The temperature-induced red-shifting ring resonance can be balanced by a spectral blueshift with temperature of the MZI. To stabilize the resonance of the ring at a given wavelength, the change in optical path lengths with temperature of the ring and the MZI should be equal and opposite. The interplay of nonlinear change in phase of ring resonator with temperature and linear change in phase of MZI with temperature, along with matching the period of this phase change, gives rise to perfect oscillation in the combined system resonance with temperature.
    Type: Grant
    Filed: November 1, 2010
    Date of Patent: June 4, 2013
    Assignee: Cornell University
    Inventors: Michal Lipson, Biswajeet Guha
  • Patent number: 8452137
    Abstract: An optical backplane is provided that has at least first and second side walls that are generally parallel to one another and at least one optical relay element disposed on at least one of the parallel side walls. An optical signal is coupled into the optical backplane through an entrance facet of the backplane. The optical signal is maintained within the optical backplane by internal reflection at the parallel side walls of the backplane. The optical relay element receives the optical signal reflected off of one of the side walls and reflects and refocuses the optical signal to guide the optical signal and prevent it from diverging as it propagates through the backplane from the entrance facet to the exit facet.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: May 28, 2013
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Ye Chen, Penyue Wen, Ron Kaneshiro
  • Patent number: 8452141
    Abstract: The present disclosure provides optical waveguide coupling devices and associated methods. In one example, an optical waveguide coupling device can comprise a dielectric grating coupler, a first optical waveguide attached to a first surface of the dielectric grating coupler, and a second optical waveguide attached to a second surface of the dielectric grating coupler. The second optical waveguide can be oriented opposed to the first optical waveguide allowing for communication therebetween via the sub-wavelength grating. Additionally, the dielectric grating coupler can comprise a first dielectric material; a sub-wavelength grating attached to the first dielectric material, the sub-wavelength grating having a higher refractive index than the first dielectric material; and a second dielectric material optically coupled to the sub-wavelength grating.
    Type: Grant
    Filed: July 30, 2010
    Date of Patent: May 28, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kai-Mei Camilla Fu, Michael Renne Ty Tan, Zhen Peng
  • Patent number: 8451528
    Abstract: Embodiments of the invention provide apparatuses and methods for phase correlated seeding of parametric mixer and for generating coherent frequency combs. The parametric mixer may use two phase-correlated optical waves with different carrier frequencies to generate new optical waves centered at frequencies differing from the input waves, while retaining the input wave coherent properties. In the case when parametric mixer is used to generate frequency combs with small frequency pitch, the phase correlation of the input (seed) waves can be achieved by electro-optical modulator and a single master laser. In the case when frequency comb possessing a frequency pitch that is larger than frequency modulation that can be affected by electro-optic modulator, the phase correlation of the input (seed) waves is achieved by combined use of an electro-optical modulator and injection locking to a single or multiple slave lasers.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: May 28, 2013
    Assignee: Ram Photonics, LLC
    Inventor: Ping Piu Kuo
  • Publication number: 20130129281
    Abstract: An optical device for implementing passive alignment of parts and a method therefore, more particularly an optical device and a method therefore that utilize an alignment reference part 115 arranged on the substrate 110 to passively align an optical element part 111 with a lens-optical fiber connection part 120. For the passive alignment of parts, connection pillars 115b of an alignment reference part 115 are coupled to substrate holes 114, one or more light-emitting elements 111a and one or more light-receiving elements 111b are aligned in a row in a particular interval with respect to alignment holes 115a arranged opposite each other in the alignment reference part 115, a lens-optical fiber connection part 120 is aligned with respect to the alignment holes 115a, and an optical fiber 133 is aligned with the optical alignment point at a surface 122b of a prism forming a portion of the lens-optical fiber connection part 120.
    Type: Application
    Filed: September 19, 2011
    Publication date: May 23, 2013
    Applicant: UNIVE CO., LTD
    Inventors: Yung Sung Son, Sang-Shin Lee, Hak-Soon Lee, Jun-Young Park
  • Patent number: 8447155
    Abstract: An optical device for generating a frequency comb includes an optical source and a first waveguide comprising a nonlinear optical medium operable to mix at least two input optical waves to generate a plurality of first optical waves. The optical device also includes a second waveguide concatenated to the first waveguide and characterized by a first dispersion characteristics and operable to compress the waveforms of the plurality of first optical waves and to reduce a frequency chirp introduced by the first waveguide. The optical device additionally includes a third waveguide concatenated to the second waveguide. The third waveguide comprises a nonlinear optical medium and is operable to mix the plurality of first optical waves to generate a plurality of second optical waves and to increase a total number of second optical waves with respect to a total number of first optical waves.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: May 21, 2013
    Assignee: Ram Photonics, LLC
    Inventors: Ping Piu Kuo, Yauheni Myslivets
  • Patent number: 8442363
    Abstract: An apparatus consisting of stacked slab waveguides whose outputs are vertically staggered is disclosed. At the input to the stacked waveguides, the entrances to each slab lie in approximately the same vertical plane. A spot which is imaged onto the input will be transformed approximately to a set of staggered rectangles at the output, without substantial loss in brightness, which staggered rectangles can serve as a convenient input to a spectroscopic apparatus. A slit mask can be added to spatially filter the outputs so as to present the desired transverse width in the plane of the spectroscopic apparatus parallel to its dispersion.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: May 14, 2013
    Assignee: C8 Medisensors Inc.
    Inventors: Sascha Hallstein, Donald A. Ice
  • Patent number: 8442364
    Abstract: An optical waveguide device includes an optical branch device for branching a first input light and outputting the branched first input light to a first and a second optical waveguides, another optical branch device, arranged between the first and the second optical waveguides, for branching a second input light and outputting the branched second input light to a third and a fourth optical waveguides, an optical coupler which couples the lights traveling along the first and the third optical waveguides, then branches the coupled lights, and outputs them; and another optical coupler which couples the lights traveling along the second and the fourth optical waveguides, then branches the coupled lights, and outputs them, wherein optical path lengths of either a pair of the first and the second optical waveguides or a pair of the third and the fourth optical waveguides are set to be equal.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: May 14, 2013
    Assignee: NEC Corporation
    Inventor: Shinya Watanabe
  • Patent number: 8442362
    Abstract: An optical coupling structure that interfaces between optical devices mounted on a substrate and optical waveguides formed in the substrate. A manufacturing method includes preparing a wafer formed on an inorganic solid material on a dicing tape and cutting the back surface of the wafer to form substantially angled portions using a dicing blade having a point angle. The dicing tape is stripped from the wafer and the wafer is separated at the valleys between the substantially angled portions to obtain an optical coupling element. The obtained optical coupling element is a three-dimensional polyhedral light-reflecting member having a mirror surface corresponding to a surface of the wafer. The obtained optical coupling element is inserted into a trench that opens, substantially perpendicular to an optical waveguide of an optical transmission substrate, in the main surface of the optical transmission substrate to provide a structure for optical coupling with the outside.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: May 14, 2013
    Assignee: International Business Machines Corporation
    Inventors: Shigeru Nakagawa, Hidetoshi Numata, Kuniaki Sueoka, Yoichi Taira
  • Patent number: 8442369
    Abstract: Methods of using an optical device capable of distributing the optical power presented at an input to specified ratios in two output ports. The devices and methods described herein have the ability to broaden the range of wavelengths over which the splitting ratio is even, or substantially even. Methods involve achieving a desired splitting ratio over a broad or ultra-broad wavelength range.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: May 14, 2013
    Assignee: NeoPhotonics Corporation
    Inventors: Kenneth McGreer, Anthony J. Ticknor, Hao Xu
  • Patent number: 8437583
    Abstract: An optical module having a flexible substrate having, even after actual manufacturing steps, excellent transmission characteristics of high-frequency signals and an advantage that electromagnetic field radiation is reduced even when it is connected with a package. The flexible substrate used in external connection of the package of the optical module uses a flexible substrate having a coplanar line to which a lead pin is fixedly attached, a grounded coplanar line which is in contact with the coplanar region, and a microstrip line which is in contact with the grounded coplanar line. The flexible substrate has an electrode layout in which an electromagnetic field component of a surface ground line and a signal line is more dominant than an electromagnetic field component of a back-surface ground line and the signal line in a region of the coplanar line adjacent to the grounded coplanar line.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: May 7, 2013
    Assignee: Oclaro Japan, Inc.
    Inventor: Takuma Ban
  • Patent number: 8433161
    Abstract: A system configured to generate an optical beam from a fiber laser is presented. The system includes a fiber gain medium having a core and a cladding, the core being configured to convert radiation from a pump beam into an output beam, the cladding having a mode propagating section and a mode stripping section bounded on a near end and a distal end by the mode propagating section, the mode stripping section of the cladding being configured to scatter excess pump radiation received from the mode propagating section in a substantially outwardly radial direction. The system also includes a rigid support member into which the fiber gain medium is placed, the rigid support member completely encompassing the mode stripping section of the cladding and joined to the fiber at the mode propagating section of the cladding.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: April 30, 2013
    Assignee: Textron Systems Corporation
    Inventors: Jason E. Langseth, Alexander E. Mandl
  • Patent number: 8430576
    Abstract: Embodiments of the invention describe optical cable housings including fiber termination units to couple optical fiber components to lenses. As in prior art solutions, embodiments of the invention utilize said fiber termination units to couple and optically align the optical fiber to the lenses; however, embodiments of the invention include flat-sided structures to more securely couple the optical fiber to the lenses; furthermore, said structures are more suitable for mass manufacturing compared to prior art solutions. Discussion herein of connectors and receptacles refers to providing a mechanical and communicative connection. The mating of the connector/receptacle may be facilitated via housing and alignment structural features, and typically includes contact of the electrical contacts and alignment of fiber optical signal transmission elements.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: April 30, 2013
    Assignee: Intel Corporation
    Inventor: Jamyuen Ko
  • Patent number: 8433172
    Abstract: The invention relates to optical guides and more precisely to guides for conveying an image without deforming the same. These guides can particularly be used in the production of ocular-vision optical systems more currently named informative spectacles. The optical guide includes an extraction section made of reflective microstructures at the surface of the guide. The microstructures define prisms having a calculated angle in order to send back the light beam at a given angle relative to the opposite surface enabling the exit thereof from the guide. Advantageously, the cut and the arrangement of said microstructures make them invisible to the eye while generating a large and comfortable image.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: April 30, 2013
    Assignee: OPT Invent
    Inventors: Benoit Pascal, Dubroca Guilhem, Sarayeddine Khaled
  • Patent number: 8432614
    Abstract: An optical device including a light waves-transmitting substrate having two major surfaces and edges, has optical means for coupling light into the substrate by total internal reflection, and a plurality of partially reflecting surfaces (22a, 22b) carried by the substrate. The partially reflecting surfaces (22a, 22b) are parallel to each other and are not parallel to any of the edges of the substrate. One or more of the partially reflecting surfaces (22a, 22b) is an anisotropic surface.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: April 30, 2013
    Assignee: Lumus Ltd.
    Inventor: Yaakov Amitai
  • Patent number: 8433162
    Abstract: A method and system for coupling optical signals into silicon optoelectronic chips are disclosed and may include coupling one or more optical signals into a back surface of one or more of a plurality of CMOS photonic chips comprising photonic, electronic, and optoelectronic devices. The devices may be integrated in a front surface of the chips and optical couplers may receive the optical signals in the front surface of the chips. The optical signals may be coupled into the back surface of the chips via optical fibers and/or optical source assemblies. The optical signals may be coupled to the optical couplers via a light path etched in the chips, which may be refilled with silicon dioxide. The chips may be flip-chip bonded to a packaging substrate. Optical signals may be reflected back to the optical couplers via metal reflectors, which may be integrated in dielectric layers on the chips.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: April 30, 2013
    Assignee: Luxtera Inc.
    Inventors: Thierry Pinguet, Attila Mekis, Steffen Gloeckner
  • Publication number: 20130100450
    Abstract: The present invention provides an optical waveguide, comprising: an input end for receiving a divergent beam; an output end for outputting an illuminating beam; a longitudinal cavity extending from the input end till the output end; a first pinhole located at a first predetermined distance from the input end within the said longitudinal cavity for receiving the divergent beam and for generating a fringe pattern, said first pinhole bifurcating the longitudinal cavity into a first and a second light propagating regions, the longitudinal cavity forming the first light propagating region being provided with a reflective coating on its internal surface to enable internal reflection of the divergent beam; and a second pinhole located at the output end for receiving the fringe pattern thus generated by the first pinhole and for outputting the illuminating beam corresponding to a central bright fringe contained in the said fringe pattern via the output end.
    Type: Application
    Filed: July 22, 2011
    Publication date: April 25, 2013
    Inventor: Amit Bhatnagar
  • Patent number: 8428400
    Abstract: An extensometer having a loop of a single-mode optical fiber. At least two points of the loop are attached to desired locations on a specimen. Light is transmitted through the loop and the transmitted optical power is measured by a photodetector. The deformation of the specimen causes the size and shape of the loop to change, which changes the transmitted optical power. The change in optical power is related to extension or compression using calibration curves. The sensor works on the principle of transmitted power modulation through the curved section.
    Type: Grant
    Filed: August 12, 2010
    Date of Patent: April 23, 2013
    Assignee: Polytechnic Institute of New York University
    Inventors: Nikhil Gupta, Nguyen Quang Nguyen