Planar Waveguides Patents (Class 65/386)
  • Patent number: 10288800
    Abstract: An integrated multilayer structure including a substrate film having a first side and an opposing second side; electronics including at least one light source, provided upon the first side and a number of electrical conductors, at least electrically coupled to the at least one light source which is configured to emit light in selected one or more frequencies or wavelengths; an optically transmissive element including thermoplastic optically transmissive material having a first refractive index and produced onto the first side of the substrate film so as to at least partially embed the at least one light source therewithin; and optical cladding including material having a lower refractive index than the first refractive index and provided adjacent the optically transmissive element upon the first side of the substrate film.
    Type: Grant
    Filed: December 8, 2018
    Date of Patent: May 14, 2019
    Assignee: TACTOTEK OY
    Inventors: Antti Keränen, Mikko Heikkinen
  • Patent number: 9329341
    Abstract: Optical waveguide coupling ratios can be modified for a package by providing a substrate with a photonic circuit disposed on a first section of the substrate and a plurality of optical waveguides formed in glass disposed on a second section of the substrate, the waveguides being connected to the photonic circuit, adjacent ones of the waveguides having a fixed coupling ratio. A three-dimensional region of the glass abutting an end of one or more of the waveguides is lased to change a refractive index of the glass in each three-dimensional region, and thereby extend a length of each waveguide abutting one of the three-dimensional regions so that the coupling ratio between that waveguide and an adjacent waveguide is changed as a function of the extended length. The lasing is controlled based on feedback so that each coupling ratio changed by the lasing varies by less than a target amount.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: May 3, 2016
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Robert Brunner, Qing Xu, Stephane Lessard
  • Patent number: 9183854
    Abstract: A method for making an interferometric taper waveguide (I-TWG) with high critical dimension uniformity and small line edge roughness for a heat assisted magnetic recording (HAMR) head, wherein the method includes creating an I-TWG film stack with two hard mask layers on top of an I-TWG core layer sandwiched between two cladding layers, defining a photoresist pattern over the I-TWG film stack using deep ultraviolet lithography, transferring the pattern to the first hard mask layer using reactive ion etching (RIE), forming a temporary I-TWG pattern on the second hard mask layer using RIE, transferring the temporary pattern to the I-TWG core using RIE, refilling the cladding layer, and planarizing using chemical mechanical planarization (CMP).
    Type: Grant
    Filed: June 13, 2014
    Date of Patent: November 10, 2015
    Assignee: Western Digital (Fremont), LLC
    Inventors: Dujiang Wan, Ge Yi, Lijie Zhao, Hai Sun, Yunfei Li
  • Patent number: 9111730
    Abstract: Novel processing methods for production of high-refractive index contrast and low loss optical waveguides are disclosed. In one embodiment, a “channel” waveguide is produced by first depositing a lower cladding material layer with a low refractive index on a base substrate and a refractory metal layer. Then, an etch mask layer is deposited on the refractory layer, followed by selective etching of the refractory metal layer with a dry-etch tool with high selectivity to the etch mask layer. Then, the refractory metal layer is oxidized to form an oxidized refractory metal region, and a top cladding layer made of a second low refractive index material to encapsulate the oxidized refractory metal region. In another embodiment, a “ridge” waveguide is produced by using similar process steps with an added step of depositing a high-refractive-index material layer and an optional optically-transparent layer.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: August 18, 2015
    Inventor: Payam Rabiei
  • Patent number: 9097865
    Abstract: An optical communication device includes a planar optical waveguide, a first substrate, a light emitting element, and a light receiving element. The planar optical waveguide includes a top surface and a light guide portion. The light guide portion includes a first sloped surface and a second sloped surface. The first substrate includes a mounting surface. The first substrate is supported on the top surface. An end of the first substrate defines a first receiving hole. The other end of the first substrate defines a second receiving hole. The light emitting element is received in the first receiving hole and faces the first sloped surface at about a 45 degree angle. The light receiving element is received in the second receiving hole and faces the second sloped surface at about a 45 degree angle.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: August 4, 2015
    Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: Kuo-Fong Tseng
  • Patent number: 9036969
    Abstract: Provided are a spot size converter and a method of manufacturing the spot size converter. The method includes stacking a lower clad layer, a core layer, and a first upper clad layer on a substrate, tapering the first upper clad layer and the core layer in a first direction on a side of the substrate, forming a waveguide layer on the first upper clad layer and the lower clad layer, and etching the waveguide layer, the first upper clad layer, the core layer, and the lower clad layer such that the waveguide layer is wider than a tapered portion of the core layer on the side of the substrate and has the same width as that of the core layer on another side of the substrate.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: May 19, 2015
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Oh Kee Kwon, Chul-Wook Lee, Dong-Hun Lee, Young Ahn Leem, Young-Tak Han, Yongsoon Baek, Yun C. Chung
  • Patent number: 9002144
    Abstract: A downsized, low-power electro-optical modulator that achieves reducing both of the additional resistance in the modulation portion and the optical loss each caused by electrodes at the same time is provided. The electro-optical modulator includes a rib waveguide formed by stacking a second semiconductor layer 9 having a different conductivity type from a first semiconductor layer 8 on the first semiconductor layer 8 via a dielectric film 11, and the semiconductor layers 8 and 9 are connectable to an external terminal via highly-doped portions 4 and 10, respectively. In a region in the vicinity of contact surfaces of the semiconductor layers 8 and 9 with the dielectric film 11, a free carrier is accumulated, removed, or inverted by an electrical signal from the external terminal, and whereby a concentration of the free carrier in an electric field region of an optical signal is modulated, so that a phase of the optical signal can be modulated.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: April 7, 2015
    Assignee: NEC Corporation
    Inventors: Junichi Fujikata, Jun Ushida, Akio Toda, Motofumi Saitoh
  • Publication number: 20150043879
    Abstract: An apparatus and method for compensating for mode-profile distortions caused by bending optical fibers having large mode areas. In various embodiments, the invention micro-structures the index of refraction in the core and surrounding areas of the inner cladding from the inner bend radius to the outer bend radius in a manner that compensates for the index changes that are otherwise induced in the index profile by the geometry and/or stresses to the fiber caused by the bending. Some embodiments of an apparatus and method include a fiber having a plurality of substantially parallel cores, the fiber including a straight section and a curved section; guiding signal light primarily in a second core in the straight section; guiding the signal light from the second core into a first core between the straight section and the curved section; and guiding the signal light primarily in the first core in the curved section.
    Type: Application
    Filed: June 17, 2014
    Publication date: February 12, 2015
    Inventor: John D. Minelly
  • Patent number: 8844322
    Abstract: An optical device including an active core layer of silica glass doped with ions which serve as optical emitters, the active core layer being on a silica glass substrate and having a layer thickness of at least 5 ?m, and wherein the layer is sintered at a temperature range of 1500-1600 C. and subsequently heat treated by a laser.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: September 30, 2014
    Assignee: Soreq Nuclear Research Center
    Inventors: Gil Atar, Ariel Bruner, David Eger, Bruno Sfez
  • Patent number: 8596825
    Abstract: A solid state light having a solid state light source such as LEDs, and optical guide, and a thermal guide. The optical guide is coupled to the light source for receiving and distributing light from the light source, and the thermal guide is integrated with the optical guide for providing thermal conduction from the solid state light source and dissipating heat through convection for cooling the light.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: December 3, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Raymond P. Johnston, Michael A. Meis, Martin Kristoffersen, Brian W. Lueck, Katie B. Thompson
  • Publication number: 20130209047
    Abstract: An optical device including an active core layer of silica glass doped with ions which serve as optical emitters, the active core layer being on a silica glass substrate and having a layer thickness of at least 5 ?m, and wherein the layer is sintered at a temperature range of 1500-1600 C and subsequently heat treated by a laser.
    Type: Application
    Filed: April 26, 2011
    Publication date: August 15, 2013
    Inventors: Gil Atar, Ariel Bruner, David Eger, Bruno Sfez
  • Publication number: 20130167594
    Abstract: Methods to fabricate an optical preform for draw into Polarization Maintaining (PM) or Polarizing (PZ) optical fiber are provided. The methods involve assembly of pre-shaped and pieced together bulk glass elements into preforms (“assembled preforms”) for simultaneous fusing and drawing into optical fiber. These preforms form a stress-induced birefringent optical core when drawn to fiber.
    Type: Application
    Filed: September 12, 2012
    Publication date: July 4, 2013
    Inventors: Edward M. Dowd, Paul E. Sanders
  • Publication number: 20130074551
    Abstract: The present invention, even in the case where the size of a preform itself is increased, enables production of a multi-core optical fiber in which cores are arranged with high accuracy. A plurality of core members each being rod-like are fixed by an array fixing member while a relative positional relation of the plurality of core members is fixed, and the plurality of core members and a cladding member are integrated into one piece, and thus a preform is obtained. By drawing the obtained preform, a multi-core optical fiber in which core arrangement is controlled with high accuracy is obtained.
    Type: Application
    Filed: September 26, 2012
    Publication date: March 28, 2013
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Eisuke SASAOKA
  • Patent number: 8350995
    Abstract: A production method of an optical film, including: a stretching step of stretching a film, wherein the film has a longitudinal direction, a width direction and a thickness direction, wherein the stretching is in either of the longitudinal direction or the width direction of the film; and a shrinking step of shrinking the film in either of the longitudinal direction or the width direction of the film, that is not the direction in which the film is stretched, wherein the film thickness in the thickness direction is increased as compared with the film thickness before at least one of the stretching step and the shrinking step.
    Type: Grant
    Filed: June 18, 2007
    Date of Patent: January 8, 2013
    Assignee: FUJIFILM Corporation
    Inventors: Hajime Nakayama, Yoji Ito
  • Publication number: 20120321260
    Abstract: A deterministic methodology is provided for designing optical fibers that support field-flattened, ring-like higher order modes. The effective and group indices of its modes can be tuned by adjusting the widths of the guide's field-flattened layers or the average index of certain groups of layers. The approach outlined here provides a path to designing fibers that simultaneously have large mode areas and large separations between the propagation constants of its modes.
    Type: Application
    Filed: June 16, 2011
    Publication date: December 20, 2012
    Inventors: Michael Joseph Messerly, Raymond John Beach, John Edward Heebner, Jay Walter Dawson, Paul Henry Pax
  • Patent number: 8312743
    Abstract: A method for forming buried ion-exchanged waveguides involves a two-step process. In a first step a waveguide is formed at the surface of a substrate using an ion-exchange technique. After formation of the waveguide, a field-assisted annealing is carried out to move the waveguide away from the surface of the substrate so that it is buried in the substrate. Exemplary field-assisted annealing is carried out at a temperature close to the ion-exchange temperature ±10° C. to optimize results.
    Type: Grant
    Filed: May 18, 2005
    Date of Patent: November 20, 2012
    Assignee: City University of Hong Kong
    Inventors: Edwin Yue Bun Pun, Ke Liu
  • Patent number: 8265445
    Abstract: Disclosed herein is a printed circuit board for an optical waveguide, including a base board, and an optical waveguide formed on the base board. The optical waveguide includes a lower clad layer formed on the base board, an insulation layer formed on the lower clad layer and having a core-forming through-hole, a core part formed on a region of the lower clad layer, which is exposed through the through-hole, and an upper clad layer formed in the through-hole and on the insulation layer.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: September 11, 2012
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Joon Sung Kim, Sang Hoon Kim, Jae Hyun Jung, Han Seo Cho
  • Patent number: 8208778
    Abstract: A channel is created within a planar layer. At least a portion of an optical path is formed within the channel. An optical core medium may be deposited into the channel. In various embodiments, reflective layers are deposited within and over the channel to form the optical path. In another embodiment, a photosensitive sheet is exposed to an optical path mask in the presence of an optical source to define an optical path lying within the plane of the sheet.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: June 26, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: James J. deBlanc, Andrew Michael Cherniski, Herbert J. Tanzer
  • Patent number: 8201421
    Abstract: To obtain an optical component having excellent secondary optical nonlinear properties by irradiating a surface and/or inside of glass having at least one member selected from Ni, Fe, V, Cu, Cr and Mn as a heat source material for absorbing and converting a laser beam to heat, incorporated to a glass matrix comprising at least one glass-forming oxide-selected from SiO2, GeO2, B2O3, P2O5, TeO2, Ga2O3, V2O5, MoO3 and WO3 and at least one member selected from alkali metals, alkaline earth metals, rare earth elements and transition elements, with a laser beam with a wavelength to be absorbed by the heat source material, to convert the irradiated portion to a single crystal or a group of crystal grains comprising components contained in the glass matrix and not containing the heat source material, thereby to form a pattern.
    Type: Grant
    Filed: August 11, 2008
    Date of Patent: June 19, 2012
    Assignees: Asahi Glass Company, Limited, Nagaoka University of Technology
    Inventors: Takayuki Komatsu, Tsuyoshi Honma, Takumi Fujiwara, Yasuhiko Benino
  • Publication number: 20120114292
    Abstract: Multi-core optical fiber ribbons and methods for making multi-core optical fiber ribbons are described herein. In one embodiment, a multi-core optical fiber ribbon includes at least two core members formed from silica-based glass and oriented in parallel with one another in a single plane. Adjacent core members have a center-to-center spacing ?15 microns and a cross-talk between adjacent core members is ??25 dB. In this embodiment each core member is single-moded with an index of refraction nc, and a core diameter dc. In an alternative embodiment, each core member is multi-moded and the center-to-center spacing between adjacent core members is ?25 microns. A single cladding layer is formed from silica-based glass and surrounds and is in direct contact with the core members. The single cladding layer is substantially rectangular in cross section with a thickness ?400 microns and an index of refraction nc1?nc.
    Type: Application
    Filed: October 14, 2011
    Publication date: May 10, 2012
    Inventors: Brett Jason Hoover, Ming-Jun Li
  • Patent number: 7995893
    Abstract: A magneto-optical structure is provided. The magneto-optical structure includes a substrate. A waveguide layer is formed on the substrate for guiding electromagnetic radiation received by the magneto-optical structure. The waveguide layer includes magnetic oxide material that comprises ABO3 perovskite doped with transition metal ions on the B site, or transition metal ions doped SnO2, or transition metal ions doped CeO2.
    Type: Grant
    Filed: October 31, 2008
    Date of Patent: August 9, 2011
    Assignee: Massachusetts Institute of Technology
    Inventors: Lei Bi, Gerald F. Dionne, Hyun Suk Kim, Caroline A. Ross
  • Publication number: 20110138860
    Abstract: True time delay silica waveguides and related fabrication methods are disclosed. Also disclosed are true time delay silica waveguides comprising wedged silica structures.
    Type: Application
    Filed: February 23, 2011
    Publication date: June 16, 2011
    Inventor: Andrea MARTIN ARMANI
  • Patent number: 7921674
    Abstract: There is provided a method of manufacturing an optical waveguide, the method including: allowing a beam to be incident in an optical waveguide direction of an optical waveguide material; generating an optical soliton in the optical waveguide material by adjusting intensity of the incident beam according to the optical waveguide material; allowing the incident beam to be re-incident at an intensity higher than an intensity of the incident beam after checking generation of the optical soliton in the optical waveguide material; and increasing a refractive index of an optical soliton-generating area of the optical waveguide material by the re-incident beam to thereby form an optical waveguide.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: April 12, 2011
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Hong Ki Kim, Bae Kyun Kim, June Sik Park, Dong Hoon Kang, Sang Su Hong, Chang Yun Lee, Tak Gyum Kim
  • Patent number: 7916992
    Abstract: Provided is an optical waveguide manufacturing method that makes the thickness of a clad layer in the vicinity of a core portion uniform. A first lamination film is fabricated by forming a clad layer by forming a first curable resin layer for clad formation on a first base film and curing the first curable resin layer, and forming a core portion by forming a second curable resin layer for core formation having a higher refractive index than that of the clad layer after cured on the clad layer and selectively curing the second curable resin layer. A second lamination film is fabricated by forming a clad layer by forming a third curable resin layer for clad formation on a second base film and curing the third curable resin layer.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: March 29, 2011
    Assignee: JSR Corporation
    Inventor: Yuichi Eriyama
  • Patent number: 7873245
    Abstract: An optoelectric composite substrate of the present invention includes an insulating film, an optical waveguide embedded in the insulating film in a state that an upper surface is exposed from the insulating film, a via hole formed to pass through the insulating film, a conductor formed in the via hole, and a connection terminal on which an optical device is mounted and which is connected to an upper end side of the conductor, wherein the connection terminal is embedded in an upper-side portion of the via hole or is projected from the insulating film.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: January 18, 2011
    Assignee: Shinko Electric Industries Co., Ltd.
    Inventors: Hideki Yonekura, Tadashi Kodaira
  • Patent number: 7783151
    Abstract: A method for fabricating a distributed Bragg reflector waveguide is disclosed, which includes forming a first distributed Bragg reflector on a substrate; forming a sacrificial pattern on the first distributed Bragg reflector; forming a second distributed Bragg reflector on the sacrificial pattern and the first distributed Bragg reflector; and removing the sacrificial pattern. A distributed Bragg reflector waveguide is also disclosed.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: August 24, 2010
    Assignee: National Central University
    Inventors: Chii-Chang Chen, Hua-Kung Chiu
  • Publication number: 20100098430
    Abstract: Devices and systems are provided for free space optical communication using optical films. Some embodiments involve using an optical film for the transmission and/or reception of light in a free space optical communication system. Some free space optical communication systems may involve devices, such as laptop computers, desktop computers, mobile communications devices, etc., that are configured for communication via an optical film. The optical film may be disposed on a device, on a wall, a window, furniture, etc., according to the implementation. Many types of free space optical communication systems are provided, including line of sight and non line of sight free space optical communication systems.
    Type: Application
    Filed: October 22, 2008
    Publication date: April 22, 2010
    Inventors: Clarence Chui, Manish Kothari
  • Patent number: 7672559
    Abstract: Optical waveguide device has waveguide strip-shaped in the depth direction of the drawing and protruding from peripheral portion. A core (not illustrated) is disposed inside waveguide. Wall to be cut is integrated with waveguide to form one core layer. No unevenness occurs in a cutting line of wall indicated with broken line. Accordingly, high-precision cutting is enabled by cutting wall along the cutting line.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: March 2, 2010
    Assignee: NEC Corporation
    Inventor: Taro Kaneko
  • Patent number: 7668414
    Abstract: A system and method for fabricating an electro-optical hybrid module (100). The electro-optical hybrid module (100) may comprise an electro-optical component, an electronic component (110), a planar light wave circuit (PLC) embedded with at least an optical waveguide (120). The electro-optical component may transmit or receive energy through a micro-folding mirror (160) while the electronic component may amplify and transfer an electric signal to the electro-optical component. The planar light wave circuit may typically provide an opto-electronic signal communication path via the plurality of optical waveguides that may be embedded in the planar light wave circuit.
    Type: Grant
    Filed: February 20, 2005
    Date of Patent: February 23, 2010
    Assignee: Colorchip (Israel) Ltd
    Inventors: Amotz Shemi, Yacov Malinovich, Eli Arad
  • Patent number: 7614253
    Abstract: A method of making optical quality films is described. A silica film is deposited on a wafer by PECVD (Plasma Enhanced Chemical Vapor Deposition). The deposited film is then subjected to a first heat treatment to reduce optical absorption, wafer warp, and compressive stress. A second film is deposited. This step is then followed by a second heat treatment to reduce optical absorption, wafer warp and tensile stress. The two heat treatments have similar temperature profiles.
    Type: Grant
    Filed: November 17, 2006
    Date of Patent: November 10, 2009
    Assignee: DALSA Semiconductor Inc.
    Inventors: Luc Ouellet, Jonathan Lachance
  • Publication number: 20090274418
    Abstract: Structures including optical waveguides disposed over substrates having a chamber or trench defined therein, and methods for formation thereof.
    Type: Application
    Filed: May 1, 2008
    Publication date: November 5, 2009
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Charles Holzwarth, Jason S. Orcutt, Milos Popovic, Judy L. Hoyt, Rajeev Ram
  • Patent number: 7599594
    Abstract: The present invention is a method of fabricating a waveguide using a sacrificial spacer layer. The first step in this process is to fabricate the underlying optical semiconductor structure. A trench is then etched in this structure and a sacrificial spacer layer is deposited in the trench. The waveguide is then created in the trench on the sacrificial spacer layer. User-defined portions of the sacrificial spacer layer are subsequently removed to create air gaps between the waveguide and the sidewalls of the trench in the optical semiconductor.
    Type: Grant
    Filed: June 7, 2006
    Date of Patent: October 6, 2009
    Assignee: The United States of America as represented by Director, National Security Agency
    Inventors: John L. Fitz, Daniel S. Hinkel, Scott C. Horst
  • Patent number: 7595010
    Abstract: Adding at least one non-silicon precursor (such as a germanium precursor, a carbon precursor, etc.) during formation of a silicon nitride, silicon oxide, silicon oxynitride or silicon carbide film improves the deposition rate and/or makes possible tuning of properties of the film, such as tuning of the stress of the film. Also, in a doped silicon oxide or doped silicon nitride or other doped structure, the presence of the dopant may be used for measuring a signal associated with the dopant, as an etch-stop or otherwise for achieving control during etching.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: September 29, 2009
    Assignee: International Business Machines Corporation
    Inventors: Ashima B. Chakravarti, Judson Holt, Kevin K. Chan, Sadanand V. Deshpande, Rangarajan Jagannathan
  • Publication number: 20090208164
    Abstract: A printed circuit board and a method of manufacturing the printed circuit board are disclosed. The printed circuit board can include: an optical waveguide, in one side of which a circuit pattern and a pad are buried; an insulation layer stacked over one side of the optical waveguide; a first insulating material stacked over the insulation layer; a first electrical wiring layer stacked over the first insulating material; a second insulating material stacked over the other side of the optical waveguide; a second electrical wiring layer stacked over the second insulating material; and a via penetrating the optical waveguide. Certain embodiments of the invention enable the efficient transmission of optical and electrical signals, reduce loss in the optical signals transferred to the photoelectric converters, and allow more efficient designs for the wiring in the board.
    Type: Application
    Filed: July 16, 2008
    Publication date: August 20, 2009
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Sang-Hoon Kim, Je-Gwang Yoo, Joo-Sung Kim, Jae-Hyun Jung, Han-Seo Cho
  • Patent number: 7568365
    Abstract: Thermal 3-D microstructuring of photonic structures is provided by depositing laser energy by non-linear absorption into a focal volume about each point of a substrate to be micromachined at a rate greater than the rate that it diffuses thereout to produce a point source of heat in a region of the bulk larger than the focal volume about each point that structurally alters the region of the bulk larger than the focal volume about each point, and by dragging the point source of heat thereby provided point-to-point along any linear and non-linear path to fabricate photonic structures in the bulk of the substrate. Exemplary optical waveguides and optical beamsplitters are thermally micromachined in 3-D in the bulk of a glass substrate. The total number of pulses incident to each point is controlled, either by varying the rate that the point source of heat is scanned point-to-point and/or by varying the repetition rate of the laser, to select the mode supported by the waveguide or beamsplitter to be micromachined.
    Type: Grant
    Filed: May 1, 2002
    Date of Patent: August 4, 2009
    Assignee: President & Fellows of Harvard College
    Inventors: Chris Schaffer, André Brodeur, Rafael R. Gattass, Jonathan B. Ashcom, Eric Mazur
  • Publication number: 20090162005
    Abstract: In general, in one aspect, a method includes forming conductive layers on a wafer. A through cavity is formed in alignment with the conductive layers. The through cavity is to permit an optical signal from an optical waveguide within an optical connector to pass therethrough. Alignment holes are formed on each side of the through cavity to receive alignment pins. The wafer having the conductive layers, the through cavity in alignment with the conductive layers, and the alignment holes on each side of the through cavity forms an optical-electrical (O/E) interface. An O/E converter is mounted to the metal layers in alignment with the through cavity. The alignment pins and the alignment holes are used to passively align the optical waveguide and the O/E converter.
    Type: Application
    Filed: December 20, 2007
    Publication date: June 25, 2009
    Inventors: Daoqiang Lu, Henning Braunisch
  • Publication number: 20090133444
    Abstract: A method of manufacturing an optical board is disclosed. The method of manufacturing an optical board may include stacking an optical waveguide core layer over a first optical waveguide cladding layer, forming an inclined surface by diffracting a laser with a mask to remove a portion of the optical waveguide core layer, and stacking a reflective layer over the inclined surface.
    Type: Application
    Filed: May 2, 2008
    Publication date: May 28, 2009
    Applicant: SAMSUNG ELECTRO-MECHANICS CO., LTD.
    Inventors: Sang-Hoon Kim, Je-Gwang Yoo, Han-Seo Cho, Joon-Sung Kim
  • Publication number: 20090135469
    Abstract: A reflection-type display apparatus that includes cavities dispersed on a light guide plate and is a type of flexible thin film, and a method for manufacturing a light guide plate. The reflection-type display apparatus includes: a reflection-type display; a light source provided on one side of the reflection-type display; a light guide plate bonded to the upper surface of the reflection-type display to scatter light introduced from the light source and having cavities transversely and longitudinally disposed by predetermined intervals on the upper surface thereof; and a film bonded to the upper surface of the light guide plate to protect the upper surface of the light guide plate.
    Type: Application
    Filed: November 25, 2008
    Publication date: May 28, 2009
    Inventors: Yu Sheop Lee, Joo Hoon Lee, Sun Tae Jung
  • Publication number: 20090103875
    Abstract: An optical waveguide includes: a center layer including at least two core layers whose edges are on substantially the same plane, and a first cladding layer provided between adjacent core layers; and a second cladding layer provided at least on both of front and rear surfaces of the center layer. At least surfaces of the core layer and the first cladding layer that are in contact with the second cladding layer include at least one resin selected from the group consisting of a resin having a hydroxyl group and a resin containing a silicon-silicon bond at a main chain thereof, and the second cladding layer includes a silicone resin.
    Type: Application
    Filed: August 8, 2008
    Publication date: April 23, 2009
    Applicant: Fuji Xerox Co., Ltd.
    Inventors: Keishi SHIMIZU, Masahiro Igusa, Akira Fujii, Toshihiko Suzuki, Kazutoshi Yatsuda, Shigemi Ohtsu, Eiichi Akutsu
  • Patent number: 7522803
    Abstract: The present invention provides a method of producing an optical element without the need for high vacuum, unlike the thin film deposition methods, and without using a molten salt. More specifically, the invention provides a method of producing an optical element comprising applying a paste containing at least one compound selected from lithium compounds, potassium compounds, rubidium compounds, cesium compounds, silver compounds, and thallium compounds, an organic resin, and an organic solvent to a glass substrate containing an alkali metal component as a glass component and then performing heat treatment at a temperature below the softening temperature of the glass substrate.
    Type: Grant
    Filed: February 15, 2005
    Date of Patent: April 21, 2009
    Assignees: Isuzu Glass Co., Ltd., National Institute of Advanced Industrial Science and Technology
    Inventors: Tatsuya Suetsugu, Norimasa Kominami, Takeshi Ohtani, Naoko Kaga, Hiroaki Yokoi, Minoru Takada, Takashi Tarumi, Toshihiko Einishi, Kohei Kadono
  • Publication number: 20090087156
    Abstract: The present invention prefers to an optical device with a channel waveguide structure as well as a method of fabrication. A thin waveguide layer (2) of a fluoride glass, in particular a Zirkonium fluoride glass, especially ZBLAN, is applied on a substrate (1) and structured to form waveguide channels (7) by pressing a stamp (3) onto said layer (2). The stamp (3) is designed having cutting edges (4) formed according to desired contours of channels (7) of the waveguide structure and providing free space for displacement of material of the waveguide layer (2). The stamp (3) and/or the waveguide layer (2) are preheated to a temperature allowing the displacement of the material of the waveguide layer (2) by the cutting edges (4). The invention allows a fast and cheep production of a channel waveguide structure.
    Type: Application
    Filed: March 8, 2007
    Publication date: April 2, 2009
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Arnd Ritz, Stefan Gruhlke
  • Publication number: 20090080848
    Abstract: The present invention provides an optical waveguide including: a cladding; at least one core embedded in the cladding; and a colored layer that is provided at a portion substantially overlapping with the core when viewed from a direction substantially perpendicular to the principal surfaces of the optical waveguide, and that is not in contact with the core.
    Type: Application
    Filed: March 27, 2008
    Publication date: March 26, 2009
    Applicant: Fuji Xerox Co., Ltd.
    Inventors: Toshihiko Suzuki, Shigemi Ohtsu, Keishi Shimizu, Kazutoshi Yatsuda, Akira Fujii, Eiichi Akutsu
  • Publication number: 20090059553
    Abstract: The present invention discloses a light guiding system, applied to a portable device configured with at least a keying unit; an illuminator producing incident light to illuminate said portable device. The light guiding system comprising: a light guiding structure; at least an incident portion provided on a side of the light guiding structure to receive the incident light from the illuminator; a plurality of light guiding portions to guide the incident light to the at least one keying unit; and a chemical layer provided on the light guiding structure.
    Type: Application
    Filed: May 7, 2008
    Publication date: March 5, 2009
    Inventor: Tai-Yen Lin
  • Publication number: 20090041409
    Abstract: An electro-optical printed circuit board and a method of making an electro-optical printed circuit board are provided. The method comprises: forming a trench or groove on an outer surface of an electrical printed circuit board; providing optical material in the trench thereby to form an optical waveguide.
    Type: Application
    Filed: July 24, 2008
    Publication date: February 12, 2009
    Applicant: XYRATEX TECHNOLOGY LIMITED
    Inventor: Kenneth McPherson HOPKINS
  • Publication number: 20090022464
    Abstract: An optical device which includes a GI-type photonic crystal slab which includes: a first member which has a distribution of refractive indexes reduced in both directions from an optical axis of incident light as to a first direction vertical to the optical axis; and a second member periodically placed in substance among the first members as to a second direction different from the first direction, wherein the distribution of refractive indexes of the first member which relates to the first direction, a thickness which relates to the first direction of the GI-type photonic crystal slab, a wavelength of the incident light and an incident end beam spot radius ?1 which relates to the first direction inside an incident end of the GI-type photonic crystal slab entered by the light of the incident light are determined to have the incident light substantially confined inside the GI-type photonic crystal slab as to the first direction.
    Type: Application
    Filed: December 10, 2004
    Publication date: January 22, 2009
    Inventor: Hidenobu Hamada
  • Publication number: 20090016670
    Abstract: A system and method for fabricating an electro-optical hybrid module (100). The electro-optical hybrid module (100) may comprise an electro-optical component, an electronic component (110), a planar light wave circuit (PLC) embedded with at least an optical waveguide (120). The electro-optical component may transmit or receive energy through a micro-folding mirror (160) while the electronic component may amplify and transfer an electric signal to the electro-optical component. The planar light wave circuit may typically provide an opto-electronic signal communication path via the plurality of optical waveguides that may be embedded in the planar light wave circuit.
    Type: Application
    Filed: February 20, 2005
    Publication date: January 15, 2009
    Inventors: Amotz Shemi, Yacov Malinovich, Eli Arad
  • Patent number: 7477823
    Abstract: Optical waveguide device has waveguide strip-shaped in the depth direction of the drawing and protruding from peripheral portion. A core (not illustrated) is disposed inside waveguide. Wall to be cut is integrated with waveguide to form one core layer. No unevenness occurs in a cutting line of wall indicated with broken line. Accordingly, high-precision cutting is enabled by cutting wall along the cutting line.
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: January 13, 2009
    Assignee: NEC Corporation
    Inventor: Taro Kaneko
  • Patent number: 7469558
    Abstract: An as-deposited waveguide structure is formed by a vapor deposition process without etching of core material. A planar optical device of a lighthouse design includes a ridge-structured lower cladding layer of a low refractive index material. The lower cladding layer has a planar portion and a ridge portion extending above the planar portion. A core layer of a core material having a higher refractive index than the low refractive index material of the lower cladding layer overlies the top of the ridge portion of the lower cladding. A slab layer of the core material overlies the planar portion of the lower cladding layer. The lighthouse waveguide also includes a top cladding layer of a material having a lower refractive index than the core material, overlying the core layer and the slab layer. A method of forming an as-deposited waveguide structure includes first forming a ridge structure in a layer of low refractive index material to provide a lower cladding layer.
    Type: Grant
    Filed: July 10, 2001
    Date of Patent: December 30, 2008
    Assignee: SpringWorks, LLC
    Inventors: Richard E. Demaray, Kai-An Wang, Ravi B. Mullapudi, Qing Zhu, Hongmei Zhang, Harold D. Ackler, John C. Egermeier, Rajiv Pethe
  • Publication number: 20080289366
    Abstract: A production method of an optical waveguide includes: preparing a laminated body that includes a first clad layer and at least a core layer laminated on the first clad layer; forming a light propagating optical waveguide core by cutting the core layer by use of a dicing saw from a side where the core layer is laminated while intruding an edge of a blade portion of the dicing saw into the first clad layer so as to partially cut the first clad layer; and embedding at least a cut portion of the laminated body with a second clad layer.
    Type: Application
    Filed: March 14, 2008
    Publication date: November 27, 2008
    Applicant: Fuji Xerox Co., Ltd.
    Inventors: Toshihiko SUZUKI, Keishi Shimizu, Kazutoshi Yatsuda, Shigemi Ohtsu, Akira Fujii, Eiichi Akutsu
  • Publication number: 20080282741
    Abstract: A production method of an optical waveguide includes: preparing a laminated body that includes a first clad layer and, on the first clad layer, a core layer and a second clad layer alternately laminated in this order so that two or more of the core layer are included in the laminated body; forming a light-propagating waveguide core by cutting the laminated body so as to reach but not cut through the first clad layer from a side where the core layer and the second clad layer are laminated; and embedding at least a cut portion of the laminated body with a third clad layer.
    Type: Application
    Filed: March 11, 2008
    Publication date: November 20, 2008
    Applicant: Fuji Xerox Co., Ltd.
    Inventors: Keishi SHIMIZU, Akira Fujii, Toshihiko Suzuki, Kazutoshi Yatsuda, Shigemi Ohtsu, Eiichi Akutsu