Particular Coupling Structure Patents (Class 385/39)
  • Patent number: 8213754
    Abstract: An optical splitter, a combiner and a device. The optical splitter comprises a first longitudinal waveguide for receiving an incoming light wave; at least first and second pairs of output waveguides, the output waveguides of each pair being disposed on opposite sides of the first waveguide; wherein each of the output waveguides of each pair comprises a longitudinal portion disposed parallel to the first waveguide and such that optical power is coupled from the first waveguide into the respective longitudinal portions and the longitudinal portions of output waveguides of the first and second pairs are displaced along a length of the first waveguide; wherein each of the output waveguides of each pair further comprises a substantially S-shaped portion continuing from the respective longitudinal portions and such that optical power coupling between the respective S-shaped portions of output waveguides of the first and second pairs is substantially inhibited.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: July 3, 2012
    Assignee: Agency for Science Technology and Research
    Inventors: Jason Png, Soon Thor Lim
  • Patent number: 8208776
    Abstract: There is provided an optical control device including a plurality of line-defect waveguides provided in a photonic crystal; each line-defect waveguide including a multiplicity of dielectric pillars with a finite height arranged at lattice points of a two-dimensional Bravais lattice. The optical control device comprises: a first line-defect waveguide; a second line-defect waveguide provided with the dielectric pillars having a thickness different from that of the dielectric pillars of the first line-defect waveguide; and a third line-defect waveguide arranged between the first and second line-defect waveguides and provided with the dielectric pillars whose thicknesses are gradually varied from those of the dielectric pillars of the first line-defect waveguide to those of the dielectric pillars of the second line-defect waveguide along a wave guiding direction.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: June 26, 2012
    Assignee: NEC Corporation
    Inventor: Masatoshi Tokushima
  • Publication number: 20120155107
    Abstract: Methods and apparatus for a free space coupler to receive light from a laser via air. In one embodiment, a system comprises a laser source, a mirror optically aligned to the laser source, a first mount to control a position of the mirror, a free-space coupler to receive light from the mirror, a beam splitter to receive light exiting the coupler, a first detector to receive light reflected from the beam splitter, a second mount coupled to the first detector and to the coupler to control a position of the coupler from information from the first detector, and a second detector to receive light reflected by the coupler and the mirror, wherein the second detector is coupled to the first mount for positioning the mirror with respect to the coupler.
    Type: Application
    Filed: December 20, 2010
    Publication date: June 21, 2012
    Applicant: Raytheon Company
    Inventors: William J. COTTRELL, Nathan G. KENNEDY
  • Publication number: 20120148194
    Abstract: A light guiding device includes an optical fiber body that extends along a longitudinal direction and that has an optical fiber center, at least three reflectors that are buried in the optical fiber body and that extend along the longitudinal direction, and a refraction layer that covers around the optical fiber body. The reflectors are spaced apart from an external surface of the optical fiber body, and surround equiangularly the optical fiber center of the optical fiber body.
    Type: Application
    Filed: February 16, 2012
    Publication date: June 14, 2012
    Inventor: LI-CHEN WANG
  • Publication number: 20120141068
    Abstract: A collector for propagating incident radiation is disclosed. The collector may comprise a light directing component coupled to a buffer component, a first propagation component coupled to the buffer component and configured to transmit the incident radiation into a collector region through one of a plurality of windows, and an optical transport assembly coupled to an end of the collector region and having a second propagation component. Each light directing component may be configured to redirect the incident radiation from a first direction to a second direction, and the collector region may include a plurality of regions exhibiting a refractive index value that gradually transitions from about 1.5 to about 2.0. The second propagation component may be further configured to retain the incident radiation.
    Type: Application
    Filed: February 12, 2012
    Publication date: June 7, 2012
    Applicant: BIOSYNERGETICS, INC.
    Inventor: Eldon H. Nyhart, JR.
  • Patent number: 8195020
    Abstract: A resonator for thermo optic devices is formed in the same process steps as a waveguide and is formed in a depression of a lower cladding while the waveguide is formed on a surface of the lower cladding. Since upper surfaces of the resonator and waveguide are substantially coplanar, the aspect ratio, as between the waveguide and resonator in an area where the waveguide and resonator front one another, decreases thereby increasing the bandwidth of the resonator. The depression is formed by photomasking and etching the lower cladding before forming the resonator and waveguide. Pluralities of resonators are also taught that are formed in a plurality of depressions of the lower cladding. To decrease resonator bandwidth, waveguide(s) are formed in the depression(s) of the lower cladding while the resonator is formed on the surface. Thermo optic devices formed with these resonators are also taught.
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: June 5, 2012
    Assignee: Micron Technology, Inc.
    Inventors: Gurtej Singh Sandhu, Guy T. Blalock, Howard E. Rhodes
  • Patent number: 8189966
    Abstract: A QKD arrangement with a photon source generating entangled idler and signal photons, with two measuring units, one of which receiving the idler photons and the other one receiving the signal photons, and each including an optical module with photon channels, wherein a photon passes a photon channel as a function of its polarization, and a device for detecting the photons in association to its respective photon channel, as well as a time control for timingly adjusting the detection devices; the photon source is adapted for pulsed emission of photon pairs, and an interrupting unit supplying the signal photons to the optical module in pulsed manner is arranged upstream of the other measuring unit, the photon channels in each optical module including delay units with different delay periods, and only one single-photon detector associates the photons to the photon channels on the basis of a time pattern.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: May 29, 2012
    Assignee: Austrian Research Centers GmbH-ARC
    Inventors: Momtchil Peev, Stefano Bettelli
  • Patent number: 8189972
    Abstract: An optical coupler includes a first waveguide configured to supply a first optical signal having a wavelength and a second waveguide. The first optical signal having a first mode. The first waveguide has a tapered portion being spaced from the second waveguide by a distance sufficient to facilitate evanescent coupling of the first optical signal from the first waveguide to the second waveguide. A first effective refractive index of the first waveguide at a location in the tapered portion being equal to a second effective refractive index at a location in the second waveguide. The first effective refractive index being associated with the first mode and the second effective refractive index being associated with a second mode of a second optical signal having the wavelength. The second mode having a different order than the first mode, and the second waveguide being configured to supply the second optical signal.
    Type: Grant
    Filed: March 31, 2009
    Date of Patent: May 29, 2012
    Assignee: Infinera Corporation
    Inventor: Brent E. Little
  • Patent number: 8184362
    Abstract: Presented is a method and system for phase locking a multi-stage parallel fiber amplifier. The method comprises receiving a signal beam from a first stage, in one path of the multi-stage fiber amplifier, onto a fiber that is pumped to produce a saturated signal beam that is then output to a second stage that outputs an amplified beam. A characteristic of the of the saturated signal beam is that its phase and amplitude do not substantially change based on the amplitude of the signal beam input onto the fiber. The method further detects a portion of the amplified beam to produce a phase indication of the amplified beam relative to amplified beams of the other paths of the multi-stage fiber amplifier. The method modulates the pump level of the first stage to control the phase of amplified beam, and further controls the phases of the other amplified beams of the other paths to phase lock the multi-stage parallel amplifier.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: May 22, 2012
    Assignee: The Boeing Company
    Inventors: Shuoqin Wang, Metin Mangir
  • Patent number: 8180188
    Abstract: A spectral filter comprises a planar optical waveguide having at least one set of diffractive elements. The waveguide confines in one transverse dimension an optical signal propagating in two other dimensions therein. The waveguide supports multiple transverse modes. Each diffractive element set routes, between input and output ports, a diffracted portion of the optical signal propagating in the planar waveguide and diffracted by the diffractive elements. The diffracted portion of the optical signal reaches the output port as a superposition of multiple transverse modes. A multimode optical source may launch the optical signal into the planar waveguide, through the corresponding input optical port, as a superposition of multiple transverse modes. A multimode output waveguide may receive, through the output port, the diffracted portion of the optical signal. Multiple diffractive element sets may route corresponding diffracted portions of optical signal between one or more corresponding input and output ports.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: May 15, 2012
    Assignee: Steyphi Services DE LLC
    Inventors: Thomas W. Mossberg, Christoph M. Greiner, Dmitri Iazikov
  • Patent number: 8175431
    Abstract: An optical fiber connection structure includes a single-core plug holding a single-core ferrule, a multi-core plug holding a multi-core ferrule, and an adaptor having a tubular sleeve. The single-core ferrule made of zirconia (ZrO2) has a cylindrical shape and is held in a holder made of stainless steel (SUS). The single-core ferrule has a convex end surface whose curvature radius R1 is at least 50 mm. The multi-core ferrule made of zirconia (ZrO2) has a cylindrical shape and is held in a holder made of stainless steel (SUS). The multi-core ferrule has a convex end surface whose curvature radius R2 is at least 18.3 mm and at most 38.7 mm. When the first and second plugs are attached to the adaptor, the singe-core ferrule and the multi-core ferrule are respectively inserted from the opposite ends into the sleeve, and both of the end surfaces of the ferrules are pressed against each other.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: May 8, 2012
    Assignee: Fujifilm Corporation
    Inventors: Yuuki Imada, Shinichi Shimotu
  • Patent number: 8170385
    Abstract: The present invention provides a light coupler and a manufacturing method thereof. The light coupler of the invention includes a plurality of light input terminals, a plurality of light output terminals, a plurality of half mirrors, and an optical wave guide connecting the plurality of the light input terminals, the plurality of the light output terminals and the plurality of the half mirrors. The optical wave guide has kinked line shape and each of the plurality of half mirrors is placed at a respective corner of the kinked line shape. Especially, the kinked line shape includes a polygon network.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: May 1, 2012
    Assignee: Toyoda Gosei Co., Ltd.
    Inventors: Kazuhiro Terada, Kenji Haga, Yukitoshi Inui, Akiko Okita, Masaaki Tsuchimori, Akari Nakao
  • Patent number: 8170384
    Abstract: Methods, systems, apparatus and devices for a variable fiber optic delay line that includes an electro-optic modulator for receiving and modulating an input signal, a switchless discrete long time delay module for injecting a long time delay into the modulated signal to produce a long delayed signal, and a switchless analog variable short delay module injecting a variable short time delay into the long delayed signal for a delayed output signal having a delay approximately equal to the long plus the short time delay. The module may also include non-dispersive single mode fibers for transmission between components and a circulator coupled for routing the input signal to the discrete long time delay module and routing the first delayed output signal to the analog variable short delay module. The VFODL can be used for Radio Frequency, digital electrical signals requiring time delay and amplitude processing or optical signal processing.
    Type: Grant
    Filed: March 5, 2009
    Date of Patent: May 1, 2012
    Assignee: University of Central Florida Research Foundation, Inc.
    Inventor: Nabeel A. Riza
  • Patent number: 8165429
    Abstract: The present invention relates to an optical interconnection structure and a method for manufacturing the same. The present invention provides an optical interconnection structure comprising: a substrate on which a hole penetrating through a predetermined region is formed; and an optical guide member fixed to the inside of the hole of the substrate, wherein the optical guide member and the substrate are fixed by metal oxide. The present invention provides the optical interconnection structure that can facilitate the optical interconnection between the active optoelectronic devices that transmit/receive the optical signals and the optical waveguide, making it possible to enhance heat dissipation efficiency and improve operation speed.
    Type: Grant
    Filed: April 26, 2009
    Date of Patent: April 24, 2012
    Assignee: Gwangju Institute of Science and Technology
    Inventors: Yongtak Lee, Youngmin Song, Eunkyeong Min
  • Patent number: 8145018
    Abstract: Exemplary apparatus for obtaining information for a structure can be provided. For example, first optical fiber arrangement(s) can be provided which transceives at least one first electro-magnetic radiation, and can include at least one fiber. Second focusing arrangement(s) can be provided in optical communication with the optical fiber arrangement. The second arrangement can be configured to focus and provide there through the first electro-magnetic radiation. Third dispersive arrangement(s) can receive a particular radiation which is the first electro-magnetic radiation and/or the focused electro-magnetic radiation, and forward a dispersed radiation thereof to at least one section of the structure. At least one end of the fiber can be directly connected to the second focusing arrangement and/or the third dispersive arrangement.
    Type: Grant
    Filed: January 17, 2007
    Date of Patent: March 27, 2012
    Assignee: The General Hospital Corporation
    Inventors: Milen Shishkov, Guillermo J. Tearney, Brett Eugene Bouma, Dvir Yelin, Nicusor Iftimia
  • Publication number: 20120057821
    Abstract: Integrated cables are disclosed that can include a first optical fiber for optical communication over the length of the integrated cables from a first connector at a first end to a second connector at a second end. The integrated cable can further include a second electrical connector configured to connect with a second electrical port external to the integrated cable. The integrated cable can further include an electrical conductor extending from the first electrical connector to the second electrical connector and configured to supply operating power to an electronic device connected to the second electrical connector but external to the integrated cable.
    Type: Application
    Filed: November 11, 2011
    Publication date: March 8, 2012
    Applicant: FINISAR CORPORATION
    Inventors: Lewis B. Aronson, Greta Light
  • Publication number: 20120057820
    Abstract: In one aspect, an illumination structure includes a substantially non-fiber waveguide, which itself includes a discrete in-coupling region for receiving light, a discrete propagation region for propagating light, and a discrete out-coupling region for emitting light.
    Type: Application
    Filed: March 7, 2011
    Publication date: March 8, 2012
    Inventors: Noam Meir, Eran Fine
  • Patent number: 8128271
    Abstract: A light emitting sign including a lightguide having a thickness not greater than 0.5 millimeters. The lightguide having an array of elongated legs extending therefrom, wherein each leg terminates in a bounding edge and is folded such that the bounding edges are stacked. At least one light source emits light into the stacked bounding edges. The light travels within the legs to the lightguide, with the light from each leg combining and totally internally reflecting within the lightguide. A plurality of light scattering features frustrate totally internally reflected light within the lightguide such that the light exits the sign in a light emitting area.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: March 6, 2012
    Assignee: FLEx Lighting II, LLC
    Inventor: Anthony J. Nichol
  • Patent number: 8131120
    Abstract: An apparatus comprising a planar optical structure that includes an input coupler, first and second planar waveguides and an output coupler, all on a planar substrate. The input coupler is configured to divide an incoming light into two input light beams. Each of the first and second waveguides is configured to receive one of the two input light beams. The first waveguide has a first core with a width that is greater than a width of a second core of the second waveguide. At least one of the first or second planar waveguides is birefringent. The output coupler is configured to receive the light beams after passage through the first and second waveguides. A first output light beam from the output coupler is substantially TE polarized light and a second output light beam from the output coupler is substantially TM polarized light.
    Type: Grant
    Filed: August 19, 2008
    Date of Patent: March 6, 2012
    Assignee: Alcatel Lucent
    Inventor: Christopher Richard Doerr
  • Publication number: 20120051692
    Abstract: There are provided an optical fiber coupler configured to improve or optimize optical efficiency and coupling efficiency, a method of manufacturing the optical fiber coupler, and an active optical module. The optical fiber coupler includes a first optical fiber and second optical fibers. The first optical fiber includes a first core and a first cladding surrounding the first core, and the second optical fibers are coupled to the first cladding. The first cladding includes a first coupling facet to which ends of the second optical fibers are coupled.
    Type: Application
    Filed: February 1, 2011
    Publication date: March 1, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Hong-Seok SEO, Joon Tae Ahn, Bong Je Park
  • Publication number: 20120051695
    Abstract: A ramp-stack chip package is described. This chip package includes a vertical stack of semiconductor dies or chips that are offset from each other in a horizontal direction, thereby defining a stepped terrace. A high-bandwidth ramp component, which is positioned approximately parallel to the stepped terrace, is mechanically coupled to the semiconductor dies. Furthermore, the ramp component includes an optical waveguide that conveys the optical signal, and an optical coupling component that optically couples the optical signal to one of the semiconductor dies, thereby facilitating high-bandwidth communication of the optical signal between the semiconductor die and the ramp component.
    Type: Application
    Filed: August 25, 2010
    Publication date: March 1, 2012
    Applicant: ORACLE INTERNATIONAL CORPORATION
    Inventors: John A. Harada, David C. Douglas, Robert J. Drost
  • Patent number: 8126302
    Abstract: Embodiments of the present invention provide a system and method for shaping an annular focal spot pattern to allow for more efficient optical coupling to a small gauge optical fiber. An embodiment of the present invention can include an illumination source operable to transmit an optical beam along an optical path, an optical fiber, and a correcting element positioned in the optical path between the illumination source and the optical fiber, the correcting element configured to reshape the optical beam to increase an amount of light received by the optical fiber.
    Type: Grant
    Filed: March 28, 2007
    Date of Patent: February 28, 2012
    Assignee: Novartis AG
    Inventors: T. Scott Rowe, Alexander N. Artsyukhovich
  • Patent number: 8121450
    Abstract: A plasma-based etching process is used to specifically shape the endface of an optical substrate supporting an optical waveguide into a contoured facet which will improve coupling efficiency between the waveguide and a free space optical signal. The ability to use standard photolithographic techniques to pattern and etch the optical endface facet allows for virtually any desired facet geometry to be formed—and replicated across the surface of a wafer for the entire group of assemblies being fabricated. A lens may be etched into the endface using a properly-defined photolithographic mask, with the focal point of the lens selected with respect to the parameters of the optical waveguide and the propagating free space signal. Alternatively, an angled facet may be formed along the endface, with the angle sufficient to re-direct reflected/scattered signals away from the optical axis.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: February 21, 2012
    Assignee: Lightwire, Inc.
    Inventors: Mark Webster, Vipulkumar Patel, Mary Nadeau, Prakash Gothoskar, David Piede
  • Patent number: 8116600
    Abstract: Provided is a small-size optical phase modulation element and an optical modulator using it. The optical phase modulation element includes a Plasmon waveguide having a clad made of a metal material having a complex dielectric constant having a negative real part in the used wavelength and a core formed by a dielectric metal material having a complex dielectric constant having a positive real part in the used wavelength. The Plasmon waveguide is connected to an optical waveguide including a clad and a core both having a complex dielectric constant having a positive real part. The core of the Plasmon waveguide and the core of the optical waveguide are formed, at least partially, of the same semiconductor material. The Plasmon waveguide has a function to phase-modulate the incident light when voltage is applied.
    Type: Grant
    Filed: December 25, 2007
    Date of Patent: February 14, 2012
    Assignee: NEC Corporation
    Inventors: Daisuke Okamoto, Masafumi Nakada, Junichi Fujikata
  • Patent number: 8111965
    Abstract: A waveguide and resonator are formed on a lower cladding of a thermo optic device, each having a formation height that is substantially equal. Thereafter, the formation height of the waveguide is attenuated. In this manner, the aspect ratio as between the waveguide and resonator in an area where the waveguide and resonator front or face one another decreases (in comparison to the prior art) thereby restoring the synchronicity between the waveguide and the grating and allowing higher bandwidth configurations to be used. The waveguide attenuation is achieved by photomasking and etching the waveguide after the resonator and waveguide are formed. In one embodiment the photomasking and etching is performed after deposition of the upper cladding. In another, it is performed before the deposition. Thermo optic devices, thermo optic packages and fiber optic systems having these waveguides are also taught.
    Type: Grant
    Filed: May 2, 2011
    Date of Patent: February 7, 2012
    Assignee: Micron Technology, Inc.
    Inventors: Guy T. Blalock, Howard E. Rhodes, Vishnu K. Agarwal, Gurtej Singh Sandhu, James S. Foresi, Jean-Francois Viens, Dale G. Fried
  • Publication number: 20120027351
    Abstract: Embodiments of the invention include an apparatus including an optical fiber having a distal end configured to emit a beam of energy. The apparatus also includes a tube including a tube channel. The distal end of the optical fiber is disposed in the tube channel. The apparatus further includes a shock absorber disposed on the tube and a cap disposed on the shock absorber.
    Type: Application
    Filed: July 19, 2011
    Publication date: February 2, 2012
    Inventors: William Asselin, Jessica Hixon, Michael O'Brien, Michael Melanson, Ty Fairneny
  • Publication number: 20120027339
    Abstract: An optical bus is described for optical signal broadcasting. The optical bus can include a substrate and input optical waveguides formed on the substrate. First and second sets of output optical waveguides can also be formed on the substrate. Optical power splitters on the substrate can have an input and multiple outputs. The optical power splitters can be optically coupled to an input optical waveguide and can split an input optical beam into multiple output optical beams. The optical bus can include a waveguide shuffle network formed on the substrate. The waveguide shuffle network can include intersecting optical waveguides and can optically couple outputs from each of the optical power splitters to the first set of output optical waveguides and optically couple different outputs from each of the optical power splitters to the second set of output optical waveguides.
    Type: Application
    Filed: July 30, 2010
    Publication date: February 2, 2012
    Inventors: Sagi Varghese Mathai, David A. Fattal, Paul Kessler Rosenberg
  • Patent number: 8107823
    Abstract: In an optical transmission module having a communication module which is freely movable in a case, when a tensile force is generated on an optical cable after connection of an optical transmission module, optical coupling surface and an optical axis center follow each other and thus stable optical transmission can be constantly performed.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: January 31, 2012
    Assignee: Opnext Japan, Inc.
    Inventors: Hiroyoshi Ishii, Toshikazu Ohtake, Osamu Yamada, Fumihide Maeda, Satoshi Motohiro
  • Publication number: 20120019877
    Abstract: A light guide includes: a body which is a light-transmitting member and has light incidence surfaces as two end surfaces in a longitudinal direction and a light output surface which is one of side surfaces extending in the longitudinal direction; and light absorbing members which are provided on the light output surface or at least one, adjacent to the light output surface, of the side surfaces of the body and have a function of absorbing light that shines on the body from outside the body.
    Type: Application
    Filed: February 3, 2011
    Publication date: January 26, 2012
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yoshiro YAMAGUCHI, Hirokazu ICHIKAWA, Akihiko NAYA
  • Patent number: 8103173
    Abstract: An optical homodyne communication system and method in which a side carrier is transmitted along with data bands in an optical data signal, and upon reception, the side carrier is boosted, shifted to the center of the data bands, and its polarization state is matched to the polarization state of the respective data bands to compensate for polarization mode dispersion during transmission. By shifting a boosted side carrier to the center of the data bands, and by simultaneously compensating for the effects of polarization mode dispersion, the provided system and method simulate the advantages of homodyne reception using a local oscillator. The deleterious effects of chromatic dispersion on the data signals within the data bands are also compensated for by applying a corrective function to the data signals which precisely counteracts the effects of chromatic dispersion.
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: January 24, 2012
    Assignee: Teradvance Communications, LLC
    Inventors: Marcel F. C. Schemmann, Zoran Maricevic, Antonije R. Djordjevic, Darby Racey
  • Patent number: 8098965
    Abstract: A novel electroabsorption modulator based on tuning the Fermi level relative to mid-gap states in a semiconductor. The modulator includes a semiconductor waveguide that has an input port and an output port. Between the input port and the output port is a section of the waveguide that functions as an electroabsorptive region. Adjacent to the electroabsorptive region are electrical contacts. In operation by adjusting voltages on the electrical contacts, the quasi-Fermi level in the electroabsorptive region of the semiconductor waveguide is brought above or below mid band-gap electronic states. As these states transition between occupancy and vacancy, the absorption coefficient for optical radiation in the electroabsorptive region of the semiconductor changes.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: January 17, 2012
    Assignee: University of Washington
    Inventors: Tom Baehr-Jones, Michael J. Hochberg
  • Patent number: 8098991
    Abstract: A method is provided for co-site interference mitigation in an RF communication system. Spectral nulls created in an optical domain may be used to mitigate interfering signals in an RF signal. The method includes: receiving an RF input signal via an antenna; generating two optical signals that are each modulated using the RF signal; creating a phase delay in one of the two optical signals that corresponds with a spectral null at a frequency of an interfering signal; converting the two optical signals into two corresponding electrical signals and combining the two electrical signals to create spectral nulls via interference between the two signals and form a mitigated output signal. In this way, the spectral null offsets the amplitude of the interfering signal, thereby reducing the signal strength of the interfering signal.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: January 17, 2012
    Assignee: Harris Corporation
    Inventors: Richard DeSalvo, Charles Middleton, Michael Borbath, Jeffrey A. Wyatt
  • Patent number: 8094983
    Abstract: An optical fiber includes a cladding, a first core, and a second core. At least one of the first core and the second core is hollow and is substantially surrounded by the cladding. At least a portion of the first core is generally parallel to and spaced from at least a portion of the second core. The optical fiber includes a defect substantially surrounded by the cladding, the defect increasing a coupling coefficient between the first core and the second core.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: January 10, 2012
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Vinayak Dangui, Michel J. F. Digonnet, Gordon S. Kino
  • Publication number: 20120002138
    Abstract: The present invention relates to a pattern forming ink composition, and more particularly, to a pattern forming ink composition having high yellowing resistance, wherein the pattern forming ink composition including an acrylate-based resin having a ring structure (A), a compound having at least one ethylenically unsaturated double bond (B) and a photoinitiator (C). The pattern forming ink is printed as a reflection pattern on a light guide plate to scatter and reflect the light incident to the reflection pattern towards a light emitting surface of the light guide plate.
    Type: Application
    Filed: June 24, 2011
    Publication date: January 5, 2012
    Inventors: Chih-Hung Lin, Chia Hui Yu
  • Patent number: 8090266
    Abstract: An apparatus comprises one or more electro-optical coupling modules. An electro-optical coupling module comprises a diode, a flexible optical coupling element, a reflective surface, and an optical fiber. The diode performs an electro-optical conversion on a signal. The flexible optical coupling element communicates the signal between the diode and the reflective surface. The reflective surface reflects the signal between the flexible optical coupling element and the optical fiber.
    Type: Grant
    Filed: November 26, 2007
    Date of Patent: January 3, 2012
    Assignee: Fujitsu Limited
    Inventors: Alexei L. Glebov, Shigenori Aoki
  • Patent number: 8090231
    Abstract: An optical system includes optical devices that each have a top side and a bottom side between lateral sides. A first one of the devices has one or more first waveguides immobilized on a first base. The first device having a first via that defines an optical path that extends from the top side of the first device to the bottom side of the first device. A second one of the devices has a second waveguide immobilized on a second base. An optical fiber has a fiber facet immobilized relative to the first device and aligned with the first via. The first device is between the fiber facet and the second device. The first device, the second device and the optical fiber are arranged such that a light signal exchanged between the optical fiber and the second waveguide travels through the first via.
    Type: Grant
    Filed: April 21, 2008
    Date of Patent: January 3, 2012
    Assignee: Kotura, Inc.
    Inventors: Mehdi Asghari, Dazeng Feng, Daniel C. Lee
  • Publication number: 20110317960
    Abstract: Devices, systems and techniques for directly coupling an optical slot waveguide to another optical waveguide without a taper waveguide region between the two optical waveguides.
    Type: Application
    Filed: January 5, 2010
    Publication date: December 29, 2011
    Applicant: GEORGETOWN UNIVERSITY
    Inventors: Edward R. Van Keuren, Changbao Ma
  • Patent number: 8081852
    Abstract: A two-ring optical buffer comprising a first ring operatively connected to a waveguide and a second ring, the second ring being operatively connected to only the first ring, the second ring and the first ring having a circumferential ratio substantially equal to 2m, where m is an integer. A ratio of resonance splitting over resonance broadening may be approximately 0.6.
    Type: Grant
    Filed: January 21, 2009
    Date of Patent: December 20, 2011
    Assignee: Nanyang Technological University
    Inventors: Landobasa Yosef Mario A. L. Tobing, Ting Mei, Mee Koy Chin, Ooi Kwen Ong, legal representative
  • Publication number: 20110305417
    Abstract: In a connector system, a first connector is mechanically and optically mateable with a second connector to form one or more optical signal communication links A wiping cleaner is included on at least one of the first and second connectors for cleaning an optical port of the other of the first and second connectors when the connectors are plugged together.
    Type: Application
    Filed: June 15, 2010
    Publication date: December 15, 2011
    Applicant: AVAGO TECHNOLOGIES FIBER IP (SINGAPORE) PTE. LTD.
    Inventors: Tak Kui Wang, Ronald T. Kaneshiro, Chung-Yi Su, Craig T. Cummings, Ye Chen, Bing Shao
  • Patent number: 8078016
    Abstract: Techniques are generally disclosed for optical devices that may be used to implement a variety of logic devices or other circuits by optical means. Example optical devices use a photodiode to alter the charge carrier concentration in a waveguide, thereby altering the index of refraction of the waveguide. The photodiode may be driven by an optical signal, which may be coupled to the photodiode through an optical waveguide. The optical signal may be configured to control the phase of coherent light coupled through the waveguide. A variety of logic devices and other circuits may be implemented by allowing the light coupled through the waveguide to constructively or destructively interfere with other coherent light.
    Type: Grant
    Filed: April 10, 2009
    Date of Patent: December 13, 2011
    Assignee: Empire Technology Development LLC
    Inventor: Ezekiel Kruglick
  • Publication number: 20110299813
    Abstract: An optical interconnect that uses silver, gold, copper or other materials whose refractive index n is less than unity as the transmitting media has been conceived. This optical interconnect will transfer information over short distances faster than electrical conduction and faster than free-space optical transmission. The transfer speed is many times the free-space speed of light.
    Type: Application
    Filed: June 3, 2011
    Publication date: December 8, 2011
    Inventor: William H. Southwell
  • Patent number: 8071934
    Abstract: A system for detecting single-shot pulse contrast includes a correlator generating a correlation signal, a spectral filter filtering light signals having wavelengths different from the correlation signal, a fiber array comprising a plurality of fibers with different lengths for transmitting the correlation signal in parallel forming parallel correlation signals, and a fiber bundle bounding the fibers at the end thereof for converging the parallel correlation signals, wherein due to different lengths of the fibers, the parallel correlation signals are converted into serial correlation signals at end of the fibers, a plurality of fiber attenuators spliced into at least one of the fibers respectively for attenuating the parallel correlation signals, a detector for detecting the serial correlation signals to produce analog signals, an A/D convertor converting the analog signals to digital signals, and a computer for processing the digital signals for retrieving the single-shot pulse contrast.
    Type: Grant
    Filed: December 23, 2008
    Date of Patent: December 6, 2011
    Assignee: Fudan University
    Inventors: Liejia Qian, Dongfang Zhang, Peng Yuan, Heyuan Zhu
  • Publication number: 20110293220
    Abstract: An optical coupling device includes an optical fiber holder configured to hold an optical fiber, a wavelength conversion member including a phosphor and an optical characteristic matching member and a wavelength conversion member holder configured to hold the wavelength conversion member. The optical coupling device includes a first region which is formed on an end face of the optical fiber and an end face of the wavelength conversion member, which are optically coupled, when bonding the optical fiber holder and the wavelength conversion member holder, and in which foreign bodies that shield the laser beam are removed from an optical axis of the optical fiber and an optical axis of the wavelength conversion member and a second region which is formed outside the first region when bonding the optical fiber holder and the wavelength conversion member holder, and in which the foreign bodies removed from the first region flow.
    Type: Application
    Filed: May 31, 2011
    Publication date: December 1, 2011
    Applicant: OLYMPUS CORPORATION
    Inventor: Yoshinori TANAKA
  • Patent number: 8064742
    Abstract: A light input/output terminal module 100 comprises a jacket tube 110 and a flange 120. A glass portion 20 of the optical fiber is inserted in the center portion thereof. To efficiently remove the leaked light in a cladding 22 to the jacket tube 110, the jacket tube 110 is made of silica glass or the same material as that of the cladding 22. The jacket tube 110 is fixed by fusion splicing or adhesion to the cladding so as to integrally unify the jacket tube 110 and the cladding 22. The beam diameter at the fiber end portion is enlarged by an optical component which fusion bonds the tip end of the optical fiber to the coreless fiber so that the optical power density at the light input/output terminal module is reduced.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: November 22, 2011
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Shingo Watanabe, Mieko Yamagaki, Tatsuya Hatano, Kazuyou Mizuno, Kanji Tanaka, Akira Fujisaki
  • Patent number: 8057107
    Abstract: An adapter couples a length of optical fiber to a hollow probe and to an optical coherence tomography instrument. The length of optical fiber may be greater than the length of the adapter itself. The optical fiber is fixed to an optical coupler at a proximal end of the adapter and may be maintained in a curved configuration by features located in an internal cavity of the adapter. An optical fiber advance mechanism be used to advance and/or retract the length of optical fiber to align it within the hollow probe.
    Type: Grant
    Filed: January 14, 2010
    Date of Patent: November 15, 2011
    Inventor: Brooks H. Rohlen
  • Publication number: 20110255821
    Abstract: The invention relates to an optical component including an array of coupled waveguides, wherein said waveguide array includes: a first area made of parallel waveguides coupled according to a first coupling coefficient; a second area adjacent to the first area and made of parallel waveguides coupled according to a second coupling coefficient lower than the first coupling coefficient; a third area adjacent to the second area and made of parallel waveguides coupled according to a third coupling coefficient higher than the second coupling coefficient; a fourth area adjacent to the third area and made of parallel waveguides coupled according to a fourth coupling coefficient lower than the third coupling coefficient; and a fifth area adjacent to the fourth area and made of parallel waveguides coupled according to a fifth coupling coefficient higher than the fourth coupling coefficient.
    Type: Application
    Filed: September 25, 2009
    Publication date: October 20, 2011
    Inventors: Jean-Marie Moison, Christophe Minot
  • Patent number: 8041161
    Abstract: A method to maximize the coupling efficiency between a collimated, free-space optical signal and a fiber optic waveguide using an active optical element to steer and focus the collimated beam driven by an adaptive controller that periodically auto-calibrates the active optical element's parameters to maximize the measured power received by the waveguide using a gradient ascent optimization algorithm.
    Type: Grant
    Filed: July 9, 2008
    Date of Patent: October 18, 2011
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Steven A. Lane, Charles Collier
  • Publication number: 20110249940
    Abstract: The present invention provides an optical branching device and an optical communication system which are easy to connect with optical fibers. In the optical branching device, when light emitted from an optical fiber in a front stage is incident on an entrance port of a multicore optical fiber, the light propagates through a first core and then is distributed from the first core to four second cores by core-to-core crosstalk between the first and second cores. The light beams distributed to the four second cores propagate through the respective cores and are emitted to four optical waveguides optically coupled core-to-core thereto within a fan-out part at exit ports.
    Type: Application
    Filed: April 11, 2011
    Publication date: October 13, 2011
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Eisuke SASAOKA, Osamu Shimakawa, Takuji Nagashima
  • Publication number: 20110249939
    Abstract: The present invention relates to light guide bodies having improved luminous intensity and transparency, to a method for their production and to their use.
    Type: Application
    Filed: February 18, 2011
    Publication date: October 13, 2011
    Applicant: EVONIK DEGUSSA GmbH
    Inventors: Jann Schmidt, Wojciech Pisula, Peter Stein, Christian Roth, Sabine Schwarz-Barac, Heiko Rochholz, Alexander Laschitsch
  • Patent number: RE43226
    Abstract: An optical multiplexing device includes an optical element having at least one set of diffractive elements, and an optical reflector. The reflector routes, between first and second optical ports, that portion of an optical signal transmitted by the diffractive element set. The diffractive element set routes, between first and multiplexing optical ports, a portion of the optical signal that is diffracted by the diffractive element set. More complex optical multiplexing functionality(ies) may be achieved using additional sets of diffractive elements, in a common optical element (and possibly overlaid) or in separate optical elements with multiple reflectors. Separate multiplexing devices may be assembled with coupled ports for forming more complex devices. The respective portions of an optical signal transmitted by and reflected/diffracted from the diffractive element set typically differ spectrally.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: March 6, 2012
    Assignee: Steyphi Services DE LLC
    Inventors: Dmitri Iazikov, Thomas W. Mossberg, Christoph M. Greiner