Concentric Patents (Class 385/127)
  • Patent number: 11401197
    Abstract: A method of forming an optical fiber preform includes: flowing a silicon halide and an oxidizer inside of a substrate tube, wherein a molar ratio of the silicon halide to the oxidizer is from about 1.5 to about 5.0; applying a plasma to the substrate tube to heat the substrate tube to a temperature of from about 1000° C. to about 1700° C.; and depositing silica glass comprising a halogen inside the substrate tube.
    Type: Grant
    Filed: September 12, 2019
    Date of Patent: August 2, 2022
    Assignee: Corning Incorporated
    Inventors: Steven Bruce Dawes, Pushkar Tandon
  • Patent number: 11378735
    Abstract: A multi-core fiber includes: plural cores made of silica-based glass; and a cladding enclosing the plural cores and made of silica-based glass, the cladding having a refractive index lower than a maximum refractive index of the plural cores. Further, the multi-core fiber has a mode field diameter of 5.0 ?m or larger at a wavelength of 1100 nm, the multi-core fiber provides single-mode propagation at the wavelength of 1100 nm, the multi-core fiber has a bending loss of 1 dB/turn or less at the wavelength of 1100 nm when the multi-core fiber is bent at a radius of 2 mm, and the multi-core fiber has a crosstalk between cores of ?30 dB/km or less.
    Type: Grant
    Filed: March 5, 2021
    Date of Patent: July 5, 2022
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Masanori Takahashi, Ryuichi Sugizaki, Masayoshi Tsukamoto
  • Patent number: 11366267
    Abstract: An optical fiber according to an embodiment includes a core and a cladding. The average value n1_ave of the refractive index of the core, the minimum value nc_min of the refractive index of the cladding, and the refractive index n0 of pure silica glass satisfy relationships of n1_ave>nc_min and nc_min<n0. The cladding contains fluorine. The fluorine concentration in the cladding is adjusted to be minimum in the outermost portion of the cladding including the outer peripheral surface of the cladding.
    Type: Grant
    Filed: January 11, 2021
    Date of Patent: June 21, 2022
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yoshinori Yamamoto, Keisei Morita, Takemi Hasegawa, Yuki Kawaguchi
  • Patent number: 11360268
    Abstract: Aspects described herein include a mode multiplexer comprising a first optical waveguide extending between a first port and a second port. A first input mode of an optical signal entering the first port is propagated through the first optical waveguide to the second port. The mode multiplexer further comprises a second optical waveguide configured to evanescently couple with a coupling section of the first optical waveguide. A second input mode of the optical signal entering the first port is propagated through the second optical waveguide to a third port. The first optical waveguide further defines a filtering section between the coupling section and the second port, the filtering section configured to filter the second input mode.
    Type: Grant
    Filed: March 17, 2021
    Date of Patent: June 14, 2022
    Assignee: Cisco Technology, Inc.
    Inventors: Tao Ling, Shiyi Chen, Ravi S. Tummidi
  • Patent number: 11327222
    Abstract: The present disclosure provides an optical fibre. The optical fibre includes a core region, a primary trench region and a secondary trench region. The core region has a radius r1. In addition, the core region has a relative refractive index ?1. Further, the primary trench region has a relative refractive index ?3. Furthermore, the primary trench region has a curve parameter ?trench-1. Moreover, the secondary trench region has a relative refractive index ?4. Also, the secondary trench region has a curve parameter ?trench-2.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: May 10, 2022
    Assignee: STERLITE TECHNOLOGIES LIMITED
    Inventors: Anand Kumar Pandey, Apeksha Malaviya, Malleswara Rao Lanke, Srinivas Reddy
  • Patent number: 11329446
    Abstract: An apparatus includes an amplified spontaneous emission source, which in turn includes an optical fiber. The optical fiber includes a solid core and a first end. The solid core includes a silica matrix. The silica matrix includes a rare-earth element and a glass co-dopant. The rare-earth element includes dysprosium or neodymium. The glass co-dopant includes Al2O3. The apparatus further includes a laser pump diode coupled to the first end of the optical fiber. The laser pump diode and the optical fiber cooperate to generate a spontaneous spectral emission confined to the solid core. The spontaneous spectral emission includes a simultaneous plurality of spectral regions.
    Type: Grant
    Filed: August 19, 2020
    Date of Patent: May 10, 2022
    Assignee: The Government of the United States of America, as represented by the Secretary of the Navy
    Inventors: Rafael R. Gattass, Colin C. Baker, Augustus Xavier Carlson, L. Brandon Shaw, Jasbinder S. Sanghera
  • Patent number: 11309975
    Abstract: An optically powered Global Navigation Satellite System (GNSS) antenna may use a fiber-optic link to receive optical power and transmit an optical signal that contains a common time signal from one or more satellites, which may allow long-distance power and signal transmission with high efficiency and reliability. The common time signal may be used to synchronize intelligent electronic devices (IEDs) of an electric power delivery system.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: April 19, 2022
    Assignee: Schweitzer Engineering Laboratories, Inc.
    Inventor: Daniel B. Rippon
  • Patent number: 11274917
    Abstract: A method of measuring a diameter of a core portion of an optical fiber preform including the core portion having a relatively high refractive index and a clad portion having a relatively low refractive index. The method includes applying parallel light to the optical fiber preform, and measuring the diameter of the core portion from an image captured by receiving the light having transmitted through the optical fiber preform.
    Type: Grant
    Filed: March 25, 2021
    Date of Patent: March 15, 2022
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventor: Yuhei Urata
  • Patent number: 11242276
    Abstract: The invention relates to a method for producing a glass-fibre preform with a core of a polygonal cross section by using a rod-in-tube method and comprising the method steps of: providing a core rod (1) of a polygonal core rod cross section (2), producing a sectored sandwich tube (3) from a starting tube (4), wherein the lateral surface of the starting tube (4) is slit in the longitudinal direction into a series of outer segments (8), and so the tube cross section of the starting tube (4) is subdivided into a series of sectors of a circle (7), inserting the core rod (1) into the sectored sandwich tube (3) and aligning it and, in the case of one embodiment, inserting the core rod (1) and the sectored sandwich tube (3) into an outer casing tube (10) with a complete annular cross section and melting the sectored sandwich tube (3) and possibly the outer casing tube (10) onto the sectored sandwich tube (3), wherein the outer segments (8) of the sectored sandwich tube (3) are fused to the respective side surfaces (9
    Type: Grant
    Filed: August 24, 2018
    Date of Patent: February 8, 2022
    Assignee: LEONI KABEL GMBH
    Inventors: Wolfgang Hämmerle, Jörg Kötzing
  • Patent number: 11215750
    Abstract: Laterally emitting optical waveguides and method introduce micromodifications into an optical waveguide and provide optical waveguides. The waveguides and methods comprise an optical wave-guiding core, a region in the optical waveguide, wherein the micro-modifications are arranged in the region of the optical waveguide, wherein the arrangement of the micro-modifications is ordered.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: January 4, 2022
    Assignee: CLINICAL LASETHERMIA SYSTEMS GMBH
    Inventors: Manuela Schwagmeier, Verena Knappe, David Ashkenasi, Hans-Joachim Cappius
  • Patent number: 11218226
    Abstract: A quantum communications system includes a quantum key generation system having a photonic quantum bit generator, a dispersion compensating optical fiber link, and a photon detector unit and a communications network having a signal generator, a signal channel, and a signal receiver. The dispersion compensating optical fiber link extends between and optically couples the photonic quantum bit generator and the photon detector unit. Further, the dispersion compensating optical fiber link is structurally configured to induce dispersion at an absolute dispersion rate of about 9 ps/(nm)km or less and induce attenuation at an attenuation rate of about 0.18 dB/Km or less such that the quantum key bit information of a plurality of photons output by the one or more photonic quantum bit generators is receivable at the photon detector unit at a bit rate of at least about 10 Gbit/sec.
    Type: Grant
    Filed: August 30, 2019
    Date of Patent: January 4, 2022
    Assignee: Corning Incorporated
    Inventors: Ming-Jun Li, Daniel Aloysius Nolan
  • Patent number: 11156769
    Abstract: A higher-order mode (HOM) fiber is configured as a polarization-maintaining fiber by including a pair of stress rods at a location within the cladding layer that provides for a sufficient degree of birefringence without unduly comprising the spatial mode profile of the propagating higher-order modes. An optical imaging system utilizing polarization-maintaining HOM fiber allows for different wavelength probe signals to be directed into different modes, useful in applications such as STED microscopy, 2D sensing, and the like.
    Type: Grant
    Filed: April 15, 2019
    Date of Patent: October 26, 2021
    Assignee: OFS FITEL, LLC
    Inventors: Raja A Ahmad, Man F Yan, David J DiGiovanni
  • Patent number: 11137542
    Abstract: An optical fiber includes a core and a cladding. The core contains silica glass and includes a central portion (part having a diameter of 0.5 ?m or more and 4 ?m or less). The central portion has the central axis of the optical fiber. The cladding contains silica glass and surrounds the core. The core contains chlorine. A chlorine concentration averaged in the entire core is 10,000 ppm or more and 50,000 ppm or less. The chlorine concentration averaged in the entire core minus a chlorine concentration averaged in the central portion is 4,500 ppm or more and 13,500 ppm or less.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: October 5, 2021
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Masato Suzuki, Takemi Hasegawa, Yuki Kawaguchi
  • Patent number: 11048039
    Abstract: An optical fiber includes: a core; a depressed layer surrounding the core; and a cladding surrounding the depressed layer. A refractive index profile of the core is an ?-th power distribution having an index ? of 1.0 or more and 2.9 or less. A relative refractive index difference ?? of the depressed layer with respect to the cladding has an absolute value |??| that is 0.05% or more and 0.15% or less. A ratio r1/r2 of a radius r1 of the core to an outer radius r2 of the depressed layer is 0.35 or more and 0.60 or less. A cable cutoff wavelength ?cc of 22 m is less than 1.26 ?m. A mode field diameter at a wavelength of 1.31 inn is larger than 8.6 inn and smaller than 9.5 ?m.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: June 29, 2021
    Assignee: Fujikura Ltd.
    Inventor: Ryo Maruyama
  • Patent number: 10916908
    Abstract: An optical apparatus includes one or more pump sources situated to provide laser pump light, and a gain fiber optically coupled to the one or more pump sources, the gain fiber including an actively doped core situated to produce an output beam, an inner cladding and outer cladding surrounding the doped core and situated to propagate pump light, and a polymer cladding surrounding the outer cladding and situated to guide a selected portion of the pump light coupled into the inner and outer claddings of the gain fiber. Methods of pumping a fiber sources include generating pump light from one or more pump sources, coupling the pump light into a glass inner cladding and a glass outer cladding of a gain fiber of the fiber source such that a portion of the pump light is guided by a polymer cladding surrounding the glass outer cladding, and generating a single-mode output beam from the gain fiber.
    Type: Grant
    Filed: December 11, 2019
    Date of Patent: February 9, 2021
    Assignee: NLIGHT, INC.
    Inventors: Dahv A. V. Kliner, Roger L. Farrow
  • Patent number: 10908353
    Abstract: An optical fiber is made of silica-based glass and includes a core, a first cladding that surrounds the core and that has a refractive index lower than a refractive index of the core; and a second cladding that surrounds the first cladding and that has a refractive index lower than the refractive index of the core and higher than the refractive index of the first cladding. At least a part of the first cladding contains a photosensitive material whose refractive index increases by irradiation with light having a specific wavelength. A difference ?n between a refractive index of a portion of the first cladding, the portion being nearest to the core, and the refractive index of the core is in a range of 0.25% to 0.30%. The radius ra of the core is larger than 4.3 ?m and smaller than or equal to 5.0 ?m.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: February 2, 2021
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Shigehiro Nagano, Manabu Shiozaki, Jun Kinugasa, Takemi Hasegawa
  • Patent number: 10908373
    Abstract: An optical fiber ribbon is formed by connecting a plurality of optical fiber colored core wires to each other with a connector formed of a UV curable resin. Each of the optical fiber colored core wires includes: a bare optical fiber; a primary layer that comprises a UV curable resin that covers the bare optical fiber; a secondary layer that comprises a UV curable resin that covers the primary layer; and a colored layer disposed outside the secondary layer and that comprises a colored UV curable resin. The primary layer has a Young's modulus that is greater than or equal to 75% of a saturated Young's modulus of the primary layer.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: February 2, 2021
    Assignee: Fujikura Ltd.
    Inventors: Akira Murata, Mizuki Isaji, Tomoaki Kaji, Yoshie Sajima
  • Patent number: 10838143
    Abstract: A rare earth-doped double-clad optical fiber includes a rare earth ion-doped fiber core, an inner cladding layer, and an outer cladding layer. A cross section of the inner cladding layer is a non-circular plane including at least two arcuate notches. According to the provided optical fiber, optical processing can be performed on a preform without changing a preform preparation process and a drawing process. The inner cladding is designed to have a non-circular planar structure having a cross section with at least two arcuate notches. While maintaining the same light absorption efficiency of pump light within the cladding layer, a preform polishing process is simplified, a risk of cracking the preform during polishing of multiple surfaces and a risk of contamination of the preform caused by impurities are reduced, wire drawing control precision is better, and comprehensive performance of the optical fiber is improved.
    Type: Grant
    Filed: September 17, 2017
    Date of Patent: November 17, 2020
    Assignee: YANGTZE OPTICAL FIBRE AND CABLE JOINT STOCK LIMITED COMPANY
    Inventors: Yucheng Yang, Beibei Cao, Xinben Zhang, Hongqi Huang, Peng Wang, Tianyong Yue
  • Patent number: 10756405
    Abstract: A hollow glass waveguide and related method are provided. The microwave waveguide includes a glass body including a first end, a second end, an outer glass surface extending between the first end and the second end, an inner glass surface defining a hollow channel that extends from the first end to the second end and a glass material between the outer surface and the inner surface. The microwave waveguide includes a layer of metal embedded in the glass body. The layer of metal surrounds the hollow channel when viewed in cross-section and extends between the first end and the second end of the glass body. The layer of metal is electrically conductive and the hollow channel is dimensioned such that microwaves introduced into the hollow channel are conducted along the hollow channel between the first end and the second end.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: August 25, 2020
    Assignee: Corning Incorporated
    Inventors: Nicholas Francis Borrelli, David John McEnroe, Joseph Francis Schroeder, III, Dean Michael Thelen, William Richard Trutna
  • Patent number: 10735100
    Abstract: Methods and systems for optical alignment to a silicon photonically-enabled integrated circuit may include aligning an optical assembly to a photonics die comprising a transceiver by, at least, communicating optical signals from the optical assembly into a plurality of grating couplers in the photonics die, communicating the one or more optical signals from the plurality of grating couplers to optical taps, with each tap having a first output coupled to the transceiver and a second output coupled to a corresponding output grating coupler, and monitoring an output optical signal communicated out of said photonic chip via said output grating couplers. The monitored output optical signal may be maximized by adjusting a position of the optical assembly. The optical assembly may include an optical source assembly comprising one or more lasers or the optical assembly may comprise a fiber array. Such a fiber array may include single mode optical fibers.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: August 4, 2020
    Assignee: Luxtera LLC.
    Inventors: Michael Mack, Anders Dahl, Subal Sahni, Steffen Gloeckner
  • Patent number: 10677050
    Abstract: An embodiment of a system for performing measurements in a downhole environment includes an optical interrogation assembly configured to emit a pulsed optical signal, the pulsed optical signal including a selected wavelength, and an optical fiber configured to be disposed in a borehole in an earth formation and configured to receive the pulsed optical signal, the optical fiber having at least one measurement location disposed therein and configured to at least partially reflect the pulsed optical signal. The optical fiber has a core and a cladding, at least a portion of the core made from at least substantially pure silica, and the optical fiber has a refractive index profile configured to have a zero dispersion wavelength that is greater than the selected wavelength.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: June 9, 2020
    Assignee: BAKER HUGHES, A GE COMPANY, LLC
    Inventors: William Albert Johnston, Paul Francis Wysocki
  • Patent number: 10663654
    Abstract: Optical fiber filters and uses thereof are presented. In typical implementations, there is provided a FBG taking deleterious light out of a fiber core without reflecting it into the fiber core. It also allows the unhindered transmission of useful light at a wavelength outside of the spectral band covered by the deleterious light. The filter couples the incoming deleterious light to cladding modes propagating in the opposite direction without coupling the incoming useful light to core or cladding modes propagating in the opposite direction. The filter may for example be useful as a Raman or ASE filter in a laser cavity of other optical devices.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: May 26, 2020
    Assignee: TERAXION INC.
    Inventors: Guillaume Brochu, Michel Morin, François Trépanier
  • Patent number: 10622778
    Abstract: A high-power fiber cladding power stripper comprises a core unit, a cladding layer, a grating structure, and a jacket. The core unit is an optical conductive material. The cladding layer is disposed outside the core unit, wherein a refractive index of the cladding layer is lower than that of the core unit. The grating structure, disposed outside the cladding layer, is for producing diffraction effects. The jacket surrounds and protects the core unit, the cladding layer, and the grating structure. Hence, in a high-power fiber laser system, the cladding power stripper can be utilized for removing residual pump energy before the laser light entering an output collimator.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: April 14, 2020
    Assignee: NATIONAL CHUNG SHAN INSTITUTE OF SCIENCE AND TECHNOLGY
    Inventors: Jian-Hung Lin, Po-Tse Tai, Wei-Chung Yen
  • Patent number: 10535973
    Abstract: An optical apparatus includes one or more pump sources situated to provide laser pump light, and a gain fiber optically coupled to the one or more pump sources, the gain fiber including an actively doped core situated to produce an output beam, an inner cladding and outer cladding surrounding the doped core and situated to propagate pump light, and a polymer cladding surrounding the outer cladding and situated to guide a selected portion of the pump light coupled into the inner and outer claddings of the gain fiber. Methods of pumping a fiber sources include generating pump light from one or more pump sources, coupling the pump light into a glass inner cladding and a glass outer cladding of a gain fiber of the fiber source such that a portion of the pump light is guided by a polymer cladding surrounding the glass outer cladding, and generating a single-mode output beam from the gain fiber.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: January 14, 2020
    Assignee: NLIGHT, INC.
    Inventors: Dahv A. V. Kliner, Roger L. Farrow
  • Patent number: 10494627
    Abstract: A system for extracting material from a region of interest includes a fluid delivery base comprising an inlet channel and an outlet channel formed within the fluid delivery base, a gasket affixed to the fluid delivery base, wherein the gasket comprises at least one opening exposing an open end of the inlet channel and an open end of the outlet channel; a support comprising a sample-supporting surface facing the gasket and an opposing surface; and an alignment member coupled to the opposing surface in a fixed position and such that the support is positioned between the fluid delivery base and the alignment member, wherein one or both of the alignment member or the fluid delivery base are biased towards one another by a force (e.g., a magnet or spring force) and wherein the fluid delivery base is separable from the support and configured to move along a plane of the sample-supporting surface to align with the alignment member.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: December 3, 2019
    Assignee: General Electric Company
    Inventors: John Richard Nelson, Wei Gao, Christopher Michael Puleo, Todd Frederick Miller, Christine Lynne Pitner, David Andrew Shoudy, Alex David Corwin
  • Patent number: 10451787
    Abstract: Provided are an optical fiber that has a short zero-dispersion wavelength, has high nonlinearity, and can cause broadband supercontinuum light to be generated with high efficiency, and a light source device that can output broadband supercontinuum light by using the optical fiber. A light source device includes a seed light source that outputs light with a central wavelength 1000 nm or more and 1650 nm or less and an optical fiber that receives the light output from the seed light source, allows the light to propagate therethrough, causes broadband light with an expanded band to be generated in accordance with a nonlinear optical phenomenon while the light propagates therethrough, and outputs the broadband light. The optical fiber is composed of silica glass, has a zero-dispersion wavelength of 1290 nm to 1350 nm, and has an effective area of 14 ?m2 or smaller at a wavelength of 1550 nm.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: October 22, 2019
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yoshinori Yamamoto, Masaaki Hirano, Yoshiaki Tamura
  • Patent number: 10429677
    Abstract: An embodiment of a waveguide has a Brillouin bandwidth, and includes cladding and a core. The cladding includes first layers of a first material, each first layer having a physical characteristic of approximately a first value, and includes second layers of a second material, each second layer having the physical characteristic of approximately a second value, the second layers alternating with the first layers such that the Brillouin bandwidth is wider than the Brillouin bandwidth would be if the cladding excluded the first layers or excluded the second layers. For example, the first and second cladding layers can be formed from different materials, or can be formed having different values of a physical characteristic such as thickness, acoustic velocity, or index of refraction. Such a waveguide can facilitate alignment of the waveguide's optical bandwidth with the waveguide's Brillouin bandwidth because the Brillouin bandwidth is widened compared to conventional waveguides.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: October 1, 2019
    Assignee: Honeywell International Inc.
    Inventors: Matthew Wade Puckett, Mary K. Salit
  • Patent number: 10422946
    Abstract: The present embodiment relates to a CMCF including a structure to achieve more efficient reduction in transmission loss by suppressing decrease in concentration of alkali metal due to diffusion of alkali metal. In the CMCF including a plurality of cores, a power coupling coefficient h between adjacent cores is set to 1×10?3/m or more, to maintain an optical coupling state between the adjacent cores. In addition, alkali metal contributing to reduction in transmission loss is added to each of the cores such that a stress maximum value ?_max between adjacent cores has a negative value.
    Type: Grant
    Filed: June 21, 2018
    Date of Patent: September 24, 2019
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Tetsuya Nakanishi, Tetsuya Hayashi
  • Patent number: 10393955
    Abstract: Optical fiber filters and uses thereof are presented. In typical implementations, there is provided a FBG taking deleterious light out of a fiber core without reflecting it into the fiber core. It also allows the unhindered transmission of useful light at a wavelength outside of the spectral band covered by the deleterious light. The filter couples the incoming deleterious light to cladding modes propagating in the opposite direction without coupling the incoming useful light to core or cladding modes propagating in the opposite direction. The filter may for example be useful as a Raman or ASE filter in a laser cavity of other optical devices.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: August 27, 2019
    Assignee: TERAXION INC.
    Inventors: Guillaume Brochu, Michel Morin, François Trépanier
  • Patent number: 10389080
    Abstract: A residual light removal structure 70 is used to remove residual light in a double-clad fiber 40 having a core 60, a cladding 62 having a refractive index lower than a refractive index of the core 60, and a covering material 64 having a refractive index lower than the refractive index of the cladding 62. The residual light removal structure 70 has a fiber housing 72 that houses part of the double-clad fiber 40, a cladding exposure portion 74 in which part of the whole circumference of the cladding 62 is exposed from the covering material 64 along a longitudinal direction of the double-clad fiber 40, and a resin 76 filled within the fiber housing 72 so as to cover at least the cladding exposure portion 74. The resin 76 has a refractive index that is equal to or higher than the refractive index of the cladding 62. For example, the cladding exposure portion is formed with a range of angles less than 180° about an axis of the double-clad fiber 40 in a cross-section perpendicular to the axis.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: August 20, 2019
    Assignee: FUJIKURA LTD.
    Inventor: Hironori Tanaka
  • Patent number: 10361787
    Abstract: Methods and systems for optical alignment to a silicon photonically-enabled integrated circuit may include aligning an optical assembly to a photonics die comprising a transceiver by, at least, communicating optical signals from the optical assembly into a plurality of grating couplers in the photonics die, communicating the one or more optical signals from the plurality of grating couplers to optical taps, with each tap having a first output coupled to the transceiver and a second output coupled to a corresponding output grating coupler, and monitoring an output optical signal communicated out of said photonic chip via said output grating couplers. The monitored output optical signal may be maximized by adjusting a position of the optical assembly. The optical assembly may include an optical source assembly comprising one or more lasers or the optical assembly may comprise a fiber array. Such a fiber array may include single mode optical fibers.
    Type: Grant
    Filed: September 1, 2017
    Date of Patent: July 23, 2019
    Assignee: Luxtera, Inc.
    Inventors: Michael Mack, Anders Dahl, Subal Sahni, Steffen Gloeckner
  • Patent number: 10297435
    Abstract: The invention relates to a micro-nozzle array comprising a plurality of capillaries comprising a first silica-based material and a second silica-based material substantially surrounding the first silica-based material of the plurality of capillaries, and a plurality of nozzles extending beyond a face of the micro-nozzle array, each nozzle corresponding to a single capillary, wherein each nozzle comprises the first silica-based material. The micro-nozzle array may be used in hydrodynamic or electro-osmotic applications. In one embodiment the micro-nozzle array is a multiple electrospray emitter. The invention also relates to methods for preparing and using micro-nozzle arrays.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: May 21, 2019
    Assignee: Queen's University at Kingston
    Inventors: Richard D. Oleschuk, Yueqiao Fu, Graham Gibson, Timothy Hutama
  • Patent number: 10259742
    Abstract: An optical fiber has a core region that is doped with one or more viscosity-reducing dopants in respective amounts that are configured, such that, in a Raman spectrum with a frequency shift of approximately 600 cm?1, the fiber has a nanoscale structure having an integrated D2 line defect intensity of less than 0.025. Alternatively, the core region is doped with one or more viscosity-reducing dopants in respective amounts that are configured such that the fiber has a residual axial compressive stress with a stress magnitude of more than 20 MPa and a stress radial extent between 2 and 7 times the core radius. According to another aspect of the invention a majority of the optical propagation through the fiber is supported by an identified group of fiber regions comprising the core region and one or more adjacent cladding regions.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: April 16, 2019
    Assignee: OFS FITEL, LLC
    Inventors: Man F. Yan, Peter I. Borel, Tommy Geisler, Rasmus V. S. Jensen, Ole A. Levring, Jorgen Ostgaard Olsen, David W. Peckham, Dennis J. Trevor, Patrick W. Wisk, Benyuan Zhu
  • Patent number: 10197728
    Abstract: The core region of an optical fiber is doped with chlorine in a concentration that allows for the viscosity of the core region to be lowered, approaching the viscosity of the surrounding cladding. An annular interface region is disposed between the core and cladding and contains a concentration of fluorine dopant sufficient to match the viscosity of the core. By including this annular stress accommodation region, the cladding layer can be formed to include the relatively high concentration of fluorine required to provide the desired degree of optical signal confinement (i.e., forming a “low loss” optical fiber). The inclusion of the annular stress accommodation region allows for the formation of a large effective area optical fiber that exhibits low loss (i.e., <0.19 dB/km) in both the C-band and L-band transmission ranges.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: February 5, 2019
    Assignee: OFS FITEL, LLC
    Inventors: Peter I Borel, Rasmus V. S. Jensen, Ole A Levring, Jorgen Ostgaard Olsen, David W Peckham, Dennis J Trevor, Patrick W Wisk, Man F Yan
  • Patent number: 10156672
    Abstract: The present invention is directed to an optical fiber that includes a glass core region that has nano-sized structures configured to scatter light propagating in the glass core region. The glass core region has an average refractive index navg. The fiber includes an interior glass cladding region that has an interior cladding refractive index n2 that is less than navg. The fiber includes an outer cladding region that has an outer cladding refractive index n3 that is less than n2. A refractive index difference of n2?n3 corresponds to a bend uniformity diameter; the light exiting the outer cladding at a fiber bending location is substantially non-uniform when a bending diameter of the fiber bending location is less than the bend uniformity diameter.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: December 18, 2018
    Assignee: CORNING INCORPORATED
    Inventors: Seldon David Benjamin, Kevin Wallace Bennett
  • Patent number: 10146008
    Abstract: An optical fiber with low attenuation and methods of making same are disclosed. The optical fiber has a core, an inner cladding surround the core, and an outer cladding surrounding the inner cladding. The outer cladding is chlorine-doped such that the relative refractive index varies as a function of radius. The radially varying relative refractive index profile of the outer cladding reduces excess stress in the core and inner cladding, which helps lower fiber attenuation while also reducing macrobend and microbend loss. A process of fabricating the optical fiber includes doping an overclad soot layer of a soot preform with chlorine and then removing a portion of the chlorine dopant from an outermost region of the overclad soot layer. The soot preform with the modified chlorine dopant profile is then sintered to form a glass preform, which can then be used for drawing the optical fiber.
    Type: Grant
    Filed: September 13, 2017
    Date of Patent: December 4, 2018
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Paul Andrew Chludzinski, Brian Lee Harper, Ming-Jun Li, Snigdharaj Kumar Mishra, Sonya Marie Raney, Pushkar Tandon
  • Patent number: 10116035
    Abstract: An electrically conductive article that includes a monolithic glass body having a first primary surface; and an electrically conducting element formed in the body. The element includes a discrete layer, or a plurality of discrete layers, of metallic silver. Each layer has a thickness T such that 0.1 ?m?T?0.5 ?m and an electrical resistivity of about 50 n?·m to about 2000 n?·m. In addition, the element is spaced apart from the first primary surface by a distance D, wherein 0.1 ?m?D?20 ?m. In some aspects, the electrically conducting element and/or the monolithic glass body are configured as an antenna assembly, an optical fiber or a flexible glass substrate.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: October 30, 2018
    Assignee: Corning Incorporated
    Inventors: Nicholas Francis Borrelli, Anthony Ng'oma, Alranzo Boh Ruffin, Joseph Francis Schroeder, III, Dean Michael Thelen
  • Patent number: 10094973
    Abstract: Optical fibers having a mode field diameter at 1310 nm of at least 8.8 ?m, wire mesh covered drum microbending losses at 1550 nm less than 0.03 dB/km, and a 2 m cutoff wavelength less than 1320 nm. The fibers may include a central core region, an inner cladding region, an outer cladding region, a primary coating with an in situ modulus less than 0.20 MPa and glass transition temperature less than ?35° C., and a secondary coating with an in situ modulus greater than 1500 MPa. The fibers may further include a depressed index cladding region. The relative refractive index of the central core region may be greater than the relative refractive index of the outer cladding region may be greater than the relative refractive index of the inner cladding region. The fibers may be produced at draw speeds of 30 m/s or greater.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: October 9, 2018
    Assignee: Corning Incorporated
    Inventors: Scott Robertson Bickham, Kevin Alton Lewis, Snigdharaj Kumar Mishra, Manuela Ocampo, Joan Diana Patterson
  • Patent number: 10018780
    Abstract: A doping optimized single-mode optical fiber with ultra low attenuation includes a core layer and cladding layers. The cladding layers has an inner cladding layer surrounding the core layer, a trench cladding layer surrounding the inner cladding layer, an auxiliary outer cladding layer surrounding the trench cladding layer, and an outer cladding layer surrounding the auxiliary outer cladding layer. The content of fluorine in the core layer is ?0.5 wt %, ?Ge?0.12%, ?n1?0.12%. The content of fluorine in the inner cladding layer is 0.5-1.5 wt %, ?n2??0.14%. The content of fluorine in the trench cladding layer is 1-3 wt %, ?n3??0.25%. The content of fluorine in the auxiliary outer cladding layer is 0.5-2 wt %, ?n4??0.14%. The outer cladding layer is a pure silicon dioxide glass layer and/or a metal-doped silicon dioxide glass layer.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: July 10, 2018
    Assignee: YANGTZE OPTICAL FIBRE AND CABLE JOINT STOCK LIMITED COMPANY
    Inventors: Lei Zhang, Shengya Long, Jihong Zhu, Jun Wu, Ruichun Wang
  • Patent number: 9995873
    Abstract: Optical fibers having a large effective area are disclosed. Three main embodiments of the optical fiber allow for single-mode operation at wavelengths of 850 nm, 980 nm and 1060 nm, respectively and have a large effective area with low bend losses. The large effective area optical fiber is expected to be particularly useful for data center applications due to its ability to efficiently optically couple with photonic integrated devices. Integrated systems and optical communication systems that employ the optical fibers are also disclosed.
    Type: Grant
    Filed: July 25, 2017
    Date of Patent: June 12, 2018
    Assignee: Corning Incorporated
    Inventors: Scott Robertson Bickham, Dana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon
  • Patent number: 9919955
    Abstract: An optical fiber has a core region that is doped with one or more viscosity-reducing dopants in respective amounts that are configured, such that, in a Raman spectrum with a frequency shift of approximately 600 cm?1, the fiber has a nanoscale structure having an integrated D2 line defect intensity of less than 0.025. Alternatively, the core region is doped with one or more viscosity-reducing dopants in respective amounts that are configured such that the fiber has a residual axial compressive stress with a stress magnitude of more than 20 MPa and a stress radial extent between 2 and 7 times the core radius. According to another aspect of the invention a majority of the optical propagation through the fiber is supported by an identified group of fiber regions comprising the core region and one or more adjacent cladding regions.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: March 20, 2018
    Assignee: OFS FITEL, LLC
    Inventors: Man F Yan, Peter I Borel, Tommy Geisler, Rasmus V Jensen, Ole A Levring, Jorgen Ostgaard Olsen, David W Peckham, Dennis J Trevor, Patrick W Wisk, Benyuan Zhu
  • Patent number: 9915819
    Abstract: The present invention is directed to a fiber optic device that enables multiphoton imaging with improved signal-to-noise ratio having a single piece of double-clad fiber (DCF). The device also includes all components for focusing, scanning and signal collection within an endomicroscope probe of 2.1 mm outer diameter (OD). The unprecedented imaging capability of this miniature endomicroscope is demonstrated herein via both ex vivo and in vivo experiments.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: March 13, 2018
    Assignee: The Johns Hopkins University
    Inventors: Xingde Li, Yicong Wu, Wenxuan Liang
  • Patent number: 9874686
    Abstract: An optical fiber comprising: (i) a core comprising silica and having a maximum relative refractive index delta ?1MAX; and LP01 effective area >100 ?m2 at 1550 nm; (ii) an inner cladding surrounding the core and having a minimum relative refractive index delta ?2MIN and ?coreMAX>?2MIN; (iii) an outer cladding surrounding the inner cladding and comprising a first outer cladding portion with a maximum refractive index ?3A such that ?3A>?2MIN; and another outer cladding portion surrounding the first outer cladding portion with a maximum refractive index delta ?3B wherein with a maximum refractive index delta ?3B wherein ?3B>?3A, said another portion being the outermost portion of the outer cladding; and (iv) a coating layer surrounding the outer cladding, and in contact with said another outer cladding portion, the coating layer having a relative refractive index delta ?C wherein ?C>?3B.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: January 23, 2018
    Assignee: Corning Incorporated
    Inventors: Snigdharaj Kumar Mishra, Michal Mlejnek, James Andrew West, William Allen Wood, Aramais Robert Zakharian
  • Patent number: 9837783
    Abstract: An optical apparatus includes one or more pump sources situated to provide laser pump light, and a gain fiber optically coupled to the one or more pump sources, the gain fiber including an actively doped core situated to produce an output beam, an inner cladding and outer cladding surrounding the doped core and situated to propagate pump light, and a polymer cladding surrounding the outer cladding and situated to guide a selected portion of the pump light coupled into the inner and outer claddings of the gain fiber. Methods of pumping a fiber sources include generating pump light from one or more pump sources, coupling the pump light into a glass inner cladding and a glass outer cladding of a gain fiber of the fiber source such that a portion of the pump light is guided by a polymer cladding surrounding the glass outer cladding, and generating a single-mode output beam from the gain fiber.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: December 5, 2017
    Assignee: nLIGHT, Inc.
    Inventors: Dahv A. V. Kliner, Roger L. Farrow
  • Patent number: 9831629
    Abstract: A hybrid fiber rod includes a fiber core and inner and outer cladding layers. The core is doped with an active element. The inner cladding layer surrounds the core, and has a refractive index substantially equal to that of the core. The outer cladding layer surrounds the inner cladding layer, and has a refractive index less than that of the core and inner cladding layer. The core length is about 30 to 2000 times the core diameter. A hybrid fiber rod laser system includes an oscillator laser, modulating device, the rod, and pump laser diode(s) energizing the rod from opposite ends. The rod acts as a waveguide for pump radiation but allows for free-space propagation of laser radiation. The rod may be used in a laser resonator. The core length is less than about twice the Rayleigh range. Degradation from single-mode to multi-mode beam propagation is thus avoided.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: November 28, 2017
    Assignee: THE UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF THE NASA
    Inventors: George E. Busch, Farzin Amzajerdian, Diego F. Pierrottet
  • Patent number: 9811163
    Abstract: A device including an elastic layer that, when depressed by an object, causes a local indentation in the layer, the geometry of the local indentation being in accordance with a force of depression, light emitters, light detectors, a light guide between the emitters and the layer directing light beams from the emitters into the layer at an angle such that the light beams, after entering the layer, remain confined to the layer by total internal reflection, a light guide between the detectors and the layer that directs light beams exiting the layer onto the detectors, each detector having a reference output value corresponding to expected light detection when no object is touching the layer, and a processor determining the object's force of depression based on the geometry of the local indentation in the layer, as calibrated by a deviation between actual and reference output values for one of the detectors.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: November 7, 2017
    Assignee: Neonode Inc.
    Inventors: Thomas Eriksson, Michael Lawrence Elyan
  • Patent number: 9788898
    Abstract: An apparatus may include an optical fiber having an angled grating aligned along a plane non-normal to a longitudinal axis of a distal end portion of the optical fiber. The angled grating may be configured to redirect a first laser energy propagated within the optical fiber and incident on the angled grating to a direction offset from the longitudinal axis. The apparatus may also include a metallic cap coupled to the optical fiber. The metallic cap may have an inner surface configured to redirect a second laser energy incident on the inner surface along the direction offset from the longitudinal axis. The second laser energy being different than the first laser energy.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: October 17, 2017
    Assignee: Boston Scientific Scimed, Inc.
    Inventor: Jeffrey W. Zerfas
  • Patent number: 9726817
    Abstract: Disclosed is a small-diameter polarization maintaining optical fiber, which relates to the field of special optical fibers. The small-diameter polarization maintaining optical fiber comprises a quartz optical fiber (5); the periphery thereof is provided with an inner coating (6) and an outer coating (8); the interior of the quartz optical fiber (5) is provided with an optical fiber core layer (1) and a quartz cladding (2); two stress zones (4) are arranged between the optical fiber core layer (1) and the quartz cladding (2); a buffer coating (7) is arranged between the inner coating (6) and the outer coating (8); the periphery of each stress zone (4) is provided with a buffer layer (3) which is concentric with the stress zone (4); when a working wavelength of a small-diameter polarization maintaining optical fiber is 1310 nm, the attenuation thereof reaches less than 0.
    Type: Grant
    Filed: November 3, 2015
    Date of Patent: August 8, 2017
    Assignee: FIBERHOME TELECOMMUNICATION TECHNOLOGIES CO., LTD.
    Inventors: Wenyong Luo, Zhijian Liu, Yili Ke, Qi Mo, Fuming Hu, Qiong Lei, Zhiwen Kang, Rong Dan, Lei Zhao
  • Patent number: 9692201
    Abstract: A bundle structure is obtained by arranging optical fibers having equal diameters in a close-packed arrangement around the outer circumference of a center optical fiber. The optical fibers are signal light optical fibers that transmit signal lights. The optical fiber is a pump light optical fiber that transmits pump light. The number of optical fibers is equal to the number of cores in the multi-core fiber. The bundle structure and the multi-core fiber are connected to one another by adhering or fusing. The cores and the cores are optically connected, and the core and the cladding are optically connected. When connecting, the mode field diameter of the cores and the cores are substantially equivalent. In addition, the outer diameter (diameter of circumscribed circle including optical fibers) of the bundle structure is set so as not to be greater than the outer diameter of the multi-core fiber.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: June 27, 2017
    Assignee: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Kengo Watanabe, Tsunetoshi Saito, Yukihiro Tsuchida, Koichi Maeda, Katsunori Imamura
  • Patent number: 9683936
    Abstract: A laser light source for emitting excitation light, a sample case, a photomultiplier tube, a fluorescence collecting optical system and so forth are embedded in a resin material that is transparent to the excitation light and the light including fluorescence emitted from a sample. The resin material is provided in at least part of a light path that guides the fluorescence in the fluorescence collecting optical system, and this resin forms a housing that holds the laser light source, the fluorescence collecting optical system, the photomultiplier and so forth. A pigment having wavelength characteristics for absorbing the excitation light, Raman light generated from the resin, and so forth is contained substantially in a uniform manner in a resin region that surrounds the light path through which the excitation light and the light including the fluorescence pass.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: June 20, 2017
    Assignees: USHIO DENKI KABUSHIKI KAISHA, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Yuji Oki, Hiroaki Yoshioka, Kinichi Morita