With Graded Index Core Or Cladding Patents (Class 385/124)
  • Patent number: 10388310
    Abstract: An apparatus includes an input coupler configured to receive light excited by a light source. A near-field transducer (NFT) is positioned at a media-facing surface of a write head. A layered waveguide is positioned between the input coupler and the NFT and configured to receive the light output from the input coupler in a transverse electric (TE) mode and deliver the light to the NFT in a transverse magnetic (TM) mode. The layered waveguide comprises a first layer extending along a light-propagation direction. The first layer is configured to receive light from the input coupler. The first layer tapers from a first cross track width to a second cross track width where the second cross track width is narrower than the first cross track width. The layered waveguide includes a second layer that is disposed on the first layer. The second layer has a cross sectional area in a plane perpendicular to the light propagation direction that increases along the light propagation direction.
    Type: Grant
    Filed: September 19, 2018
    Date of Patent: August 20, 2019
    Assignee: Seagate Technology LLC
    Inventors: Christopher Neil Harvey, Aidan Dominic Goggin, Kelly Elizabeth Callan, John Bernard McGurk, Reyad Mehfuz
  • Patent number: 10324253
    Abstract: Few mode optical fibers for mode division multiplexing. The Few Mode Fiber supporting 25 or 30 LP guided modes and includes a graded index core with a ?-profile, a radius R1 (at 0 refractive index difference) between 21.5 and 27 ?m and a maximum refractive index difference Dn1 between 12.5×10?3 and 20×10?3, and an end of the ?-profile at a radius R1b, with index difference Dn1b; a trench surrounding the core with radius R3 between 30 and 42 ?m and refractive index difference Dn3 between ?15.10?3 and ?6.10?3, an intermediate depressed trench with a radius R2, with R1b<R2<R3 and a refractive index difference Dn2, with Dn3<Dn2<0, wherein: for |Dn1b?Dn2|>=0.5×10?3, Min(Dn1b, Dn2)??1.5×10?3, and for |Dn1b?Dn2|<0.5×10?3, Dn2 is between ?5×10?3 and ?3.5×10?3.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: June 18, 2019
    Assignee: Draka Comteq BV
    Inventors: Pierre Sillard, Denis Molin, Marianne Bigot
  • Patent number: 10294146
    Abstract: The single-mode optical fibers have a core region that includes an inner core region having a delta value ?1 and a radius r1 immediately surrounded by an outer core region of radius r2 and a delta value ?2<?1, wherein ?1-?2 is in the range from 0.3% to 2%. A cladding region of radius r3 immediately surrounds the core region. The inner and outer regions define an annular width ?r=r2?r1. At least one of r1, r2, ?r and r3 changes with a period p in the longitudinal direction between first and second values each having a corresponding level distance dF. The change occurs over a transition distance dT such that dT/dF<0.1. The Brillouin frequency shift ?f changes by an amount ?[?f] that is least 10 MHz over each period p, thereby allowing for Brillouin frequency-shift management in fiber-based sensor systems.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: May 21, 2019
    Assignee: Corning Incorporated
    Inventors: Ming-Jun Li, Shenping Li, Jeffery Scott Stone
  • Patent number: 10295735
    Abstract: Few mode optical fibers for mode division multiplexing. The Few Mode Fiber supporting 25 or 30 LP guided modes and includes a graded index core with a ?-profile, a radius R1 (at 0 refractive index difference) between 23 and 27 ?m and a maximum refractive index difference Dn1 between 14·10?3 and 17·10?3, and an end of the ?-profile at a radius R1b, with index difference Dn1b; a trench surrounding the core with radius R3 between 30 and 40 ?m and refractive index difference Dn3 between ?15·10?3 and ?6·10?3. Such a FMF shows a specific design of the interface between the core and the cladding such that R1b>R1, Dn1b between ?10·10?3 and ?3·10?3, and Dn1b?Dn3?0.9×10?3.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: May 21, 2019
    Assignee: Draka Comteq BV
    Inventors: Pierre Sillard, Denis Molin, Marianne Bigot
  • Patent number: 10295736
    Abstract: A multicore fiber includes a plurality of cores including a first core and a cladding surrounding the plurality of cores. The first core includes: an inner core; and an outer core surrounding the inner core with no gap and having a refractive index higher than a refractive index of the inner core and a refractive index of the cladding. The core is not doped with any rare earth element. At least two LP mode light beams at a predetermined wavelength propagate through the first core at an attenuation of 0.3 dB/km or less.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: May 21, 2019
    Assignee: FUJIKURA LTD.
    Inventors: Yoshimichi Amma, Katsuhiro Takenaga, Shota Saito
  • Patent number: 10294144
    Abstract: There is provided an optical glass having high infrared transmittance and being useful as an on-vehicle infrared sensor and the like. An optical glass including, in expression of atomic %: Ge+Ga; 6% to 30%; S+Se+Te; 50% to 85%; and Ti; 0.001% to 0.5%, wherein a wavelength (?T10%) at a long-wavelength side end in which infrared transmittance in a glass plate of the optical glass converted to a thickness of 1 mm becomes 10% is 12 ?m or more.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: May 21, 2019
    Assignee: AGC Inc.
    Inventors: Tatsuo Nagashima, Hiroyasu Miyazawa, Kenji Kitaoka
  • Patent number: 10215913
    Abstract: A multicore fiber includes: a first core configured to propagate an LP01 mode, an LP11 mode, and an LP21 mode light beam; and a second core configured to propagate an LP01 mode light beam, wherein a different mode interaction section is provided in which a propagation constant of the LP21 mode light beam propagated through the first core is matched with a propagation constant of the LP01 mode light beam propagated through the second core, a different mode non-interaction section is provided in which propagation constants of the LP mode light beams propagated through the first core are not matched with propagation constants of the LP mode light beams propagated through the second core, and the first core includes an inner core and an outer core surrounding the inner core with no gap and having a refractive index higher than a refractive index of the inner core.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: February 26, 2019
    Assignees: FUJIKURA LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Yusuke Sasaki, Hitoshi Uemura, Kunimasa Saitoh, Takeshi Fujisawa
  • Patent number: 10197725
    Abstract: A multimode optical fiber for continuous transmission of electromagnetic radiation at high power, wherein the fiber defines a fiber axis and includes a core and a cladding surrounding the core, and wherein the multimode optical fiber is a multimode graded-index fiber, the refraction index profile in the fiber essentially following formula (1): n ? ( r ) = { n 1 ? [ 1 - 2 ? ( r a ) g ? ? ] 1 ? / ? 2 , r < a n 2 , r > a ( 1 ) ? = n 1 2 - n 2 2 2 ? n 1 2 ( A ) NA = n 1 2 - n 2 2 ( B ) where ? is formula (A), r is the distance from the fiber axis, n(r) is the nominal refractive index as a function of distance from the fiber axis, n1 is the nominal refractive index on the axis of the fiber, n2 is the refractive index of the cladding, a is the core radius, and g is a parameter that defines the shape of the profile, where the core diameter 2a is between 90 UM and 190 ?M, the parameter g is between 1.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: February 5, 2019
    Assignee: PRYSMIAN S.p.A
    Inventors: João Carlos Vieira Da Silva, Evandro Lee Anderson Spìnola De Souza, Valeria Garcia, João Batista Rosolem, Claudio Floridia, Marcos Antonio Brandão Sanches
  • Patent number: 10177521
    Abstract: An apparatus includes an optical fiber configured to transport an optical signal. The optical fiber includes a core configured to receive and amplify the optical signal. The optical fiber also includes end features optically coupled to opposite ends of the core. The core has a lower bend loss than the end features. The optical fiber further includes a cladding surrounding the core and the end features. The optical fiber is configured to confine optical power of a fundamental mode in the core. The optical fiber is also configured to allow optical power of one or more higher-order modes to leak from the core into the end features.
    Type: Grant
    Filed: February 20, 2017
    Date of Patent: January 8, 2019
    Assignee: Raytheon Company
    Inventors: Vladimir V. Shkunov, David A. Rockwell
  • Patent number: 10162109
    Abstract: According to embodiments, an optical fiber may include a core portion comprising a radius rC, a centerline CL, a numerical aperture NA greater than or equal to 0.15 and less than or equal to 0.25, a graded relative refractive index profile having a maximum relative refractive index ?Cmax and an ? value greater than or equal to 1 and less than or equal to 3. The core portion may include an up-dopant with a graded concentration from the radius rC to the centerline CL and an attenuation dopant with a constant concentration from the centerline CL of the core portion to the radius rC of the core portion. The optical fiber is multi-moded for wavelengths of light within a range from 800 nm to 1350 nm and an attenuation of the optical fiber wavelengths between 800 nm and 1000 nm is greater than or equal to 0.5 dB/m.
    Type: Grant
    Filed: January 26, 2018
    Date of Patent: December 25, 2018
    Assignee: Corning Incorporated
    Inventors: Kevin Wallace Bennett, Scott Robertson Bickham, Dana Craig Bookbinder, Robert Arnold Knowlton, Ming-Jun Li, Pushkar Tandon
  • Patent number: 10150695
    Abstract: A co-doped optical fiber is provided having an attenuation of less than about 0.17 dB/km at a wavelength of 1550 nm. The fiber includes a core region in the fiber having a graded refractive index profile with an alpha of greater than 5. The fiber also includes a first cladding region in the fiber that surrounds the core region. Further, the core region has a relative refractive index of about ?0.10% to about +0.05% compared to pure silica. In addition, the core region includes silica that is co-doped with chlorine at about 1.2% or greater by weight and fluorine between about 0.1% and about 1% by weight.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: December 11, 2018
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon
  • Patent number: 10126495
    Abstract: A multi-purpose optical fiber with coating is provided. The optical fiber can function as a transmission fiber or as a coupling fiber for optical data links that features low coupling loss to silicon photonics lasers, VCSELs, single mode transmission fibers, multimode transmission fibers, and high speed receivers. The fiber includes a core, an optional inner cladding region, a depressed index cladding region, an outer cladding region, and a coating. The relative refractive index profile of the coupling fiber includes a small-radius core region with ? profile and a depressed index cladding region that facilitates low bending loss and high bandwidth. The coating thickness and overall diameter of the fiber is small.
    Type: Grant
    Filed: June 22, 2017
    Date of Patent: November 13, 2018
    Assignee: Corning Incorporated
    Inventors: Scott Robertson Bickham, Ching-Kee Chien, Ruchi Tandon
  • Patent number: 10107957
    Abstract: According to some embodiments, a multimode optical fiber comprises a graded index glass core with refractive index ?1, a maximum refractive index delta ?1MAX, and a core radius between 10 and 40 microns; and cladding region surrounding the core comprising refractive index ?4, wherein the fiber exhibits an overfilled bandwidth exhibits an overfilled bandwidth of at least 3 GHz-km at a wavelength of 850 nm and an overfilled bandwidth of at least 1.2 GHz-km at one or more wavelengths between 980 and 1060 nm.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: October 23, 2018
    Assignee: Corning Incorporated
    Inventors: Scott Robertson Bickham, Xin Chen, Ming-Jun Li
  • Patent number: 10094975
    Abstract: An optical fiber comprising: (i) a chlorine doped silica based core comprising a core alpha (?)>10, and maximum refractive index delta ?1max % and Cl concentration >1 wt %; (ii) a cladding surrounding the core, the cladding comprising: (a) an inner cladding region adjacent to and in contact with the core and having a refractive index delta ?2 and a minimum refractive index delta ?2min such that ?2min<?1max, the inner cladding region comprising fluorine doped silica and the refractive index delta ?2 with region that decreases with radial position, and (b) an outer cladding region surrounding the inner cladding region and having refractive index delta ?3, such that ?2min<?3. The fiber has mode field diameter MFD at 1310 nm of ?9 microns, a cable cutoff of ?1260 nm, zero dispersion wavelength of 1300 nm?zero dispersion wavelength ?1324 nm and bend loss at 1550 nm for a 20 mm mandrel of less than 0.5 dB/turn.
    Type: Grant
    Filed: July 26, 2017
    Date of Patent: October 9, 2018
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon
  • Patent number: 10085614
    Abstract: A transmitting device includes: a first transmission unit; a second transmission unit having transmission lines each having a proximal end at which a transmitting-side connecting portion is provided; and a first switch for selecting a transmission line from the second transmission unit, to connect the selected transmission line to the first transmission unit.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: October 2, 2018
    Assignee: OLYMPUS CORPORATION
    Inventor: Hideaki Kinouchi
  • Patent number: 10082622
    Abstract: Disclosed herein are optical waveguide fibers comprising: (I) a core comprising an outer radius r1, a maximum refractive index delta percent ?1max and core alpha, ?, of larger than 5; and (II) a cladding surrounding the core, the cladding comprising: (i) an inner cladding region having outer radius r2 and refractive index delta percent ?2, wherein ?1max>?2; (ii) a trench region surrounding the inner cladding region, the trench region having an outer radius, r3 where r3?10 microns and refractive index delta percent ?3; and (iii) an outer cladding region having chlorine concentration of ?1.2 wt. % surrounding the trench region and comprising refractive index delta percent ?4, wherein ?1max>?4 and ?2>?3, and ?4>?3 and wherein the difference between ?4 and ?3 is ?0.12 percent.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: September 25, 2018
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon
  • Patent number: 10031283
    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: March 7, 2017
    Date of Patent: July 24, 2018
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Tetsuya Nakanishi, Tetsuya Hayashi
  • Patent number: 10031285
    Abstract: The present embodiment relates to an MCF having a low transmission loss and having a structure for reducing a transmission loss and effectively suppressing an inter-core XT. The uncoupled MCF includes alkali metal having a predetermined concentration in which each of a plurality of cores contributes to reduction in the transmission loss, and a core pitch is set so that a sum h_total of power coupling coefficients of a specific core and the remaining all cores of the plurality of cores is 2.3×10?4/km or less.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: July 24, 2018
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Tetsuya Nakanishi, Tetsuya Hayashi, Takashi Sasaki, Yoshiaki Tamura, Tetsuya Haruna
  • Patent number: 10018779
    Abstract: A bending-insensitive single-mode fiber with ultralow attenuation includes a core layer and cladding layers. The cladding layers includes 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 cladding layer. The core layer has a radius of 3.0 to 3.9 ?m and a relative refractive index of ?0.04% to 0.12%. The inner cladding layer has a radius of 8 to 14 ?m and a relative refractive index ?0.35% to ?0.10%. The trench cladding layer has a radius of 14 to 20 ?m and a relative refractive index of ?0.6% to ?0.2%. The auxiliary outer cladding layer has a radius of 35 to 50 ?m and a relative refractive index of ?0.4% to ?0.15%. The outer cladding layer is a pure silica glass layer.
    Type: Grant
    Filed: October 17, 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, Hongyan Zhou, Rui Zhang, Ruichun Wang
  • Patent number: 10018558
    Abstract: A system and method are provided for distributed acoustic sensing in a multicore optical fiber. The system includes a transmitter for simultaneously propagating a sequence of M light pulses through the multicore optical fiber using a spatial mode selected from a set of N spatial modes provided by a spatial mode selector for the transmitter that is coupled to an input to the multicore optical fiber, with M and N being respective integers greater than one. The system further includes a receiver for receiving the sequence of M light pulses at an output of the multicore optical fiber and detecting an environmental perturbation in the multicore optical fiber based on an evaluation of a propagation of the sequence of M light pulses through the multicore optical fiber.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: July 10, 2018
    Assignee: NEC Corporation
    Inventors: Fatih Yaman, Giovanni Milione, Shaoliang Zhang, Yue-Kai Huang
  • Patent number: 10012793
    Abstract: An optical network having at least one star coupler comprising transmit and receive optical mixers which are respectively optically coupled to transmitters and receivers of a plurality of optical-electrical media converters. Each optical-electrical media converter comprises a respective receiver optically coupled to the receive optical mixer by way of plastic optical fibers and a respective transmitter optically coupled to the transmit optical mixer by way of plastic optical fibers. The output plastic optical fibers attached to an output face of the receive optical mixer have a diameter less than the diameter of the input plastic optical fibers attached to an input face of the receive optical mixer.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: July 3, 2018
    Assignee: The Boeing Company
    Inventors: Eric Y. Chan, Dennis G. Koshinz, Tuong K. Truong, Henry B. Pang
  • Patent number: 9995826
    Abstract: An electronic distance meter includes an optical unit which emits light to a target object and receives the light reflected by the target object with a light receiving element, a measuring unit which calculates a length of round-trip time taken for the light to make a round trip to the target object and measures a distance to the target object according to the round-trip time of the received light, a light receiving system which receives and condenses the light reflected by the target object, and an optical guide which guides the light condensed by the light receiving element to the light receiving system, including a multi-mode graded index fiber and a multi-mode step index fiber coupled with each other.
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: June 12, 2018
    Assignee: Kabushiki Kaisha Topcon
    Inventors: Shigenori Nagano, Yasushi Tanaka, Kenichiro Yoshino
  • Patent number: 9938393
    Abstract: A fully dense ceramic and/or other inorganic fiber containing elongated crystal grains in and around the fiber center and oriented along the fiber axis, with a smooth transition to more equiaxed grains towards the radial periphery of the fiber, and method for producing such.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: April 10, 2018
    Assignee: FREE FORM FIBERS, LLC
    Inventors: John L. Schneiter, Joseph Pegna, Ramkiran Goduguchinta, Kirk L. Williams, Shay Llewellyn Harrison
  • Patent number: 9915782
    Abstract: An optical interconnection device including: a first element layer formed on a substrate; a second element layer disposed on the first element layer and receiving an optical signal; and a mode converter interposed between the first element layer and the second element layer, and eliminating a difference between an effective refractive index of the first element layer and an effective refractive index of the second element layer and match a mode profile, wherein the first element layer, the mode converter, and the second element layer are sequentially disposed on respective planes spaced apart from each other on the substrate, and one end of the mode converter overlaps a part of the second element layer, and the other end of the mode converter overlaps a part of the first element layer.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: March 13, 2018
    Assignee: KOOKMIN UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION
    Inventors: Donghwan Ahn, Yoonyoung Bae
  • Patent number: 9910216
    Abstract: One of embodiments relates to an optical fiber in which an alkali metal element is efficiently doped to its core to suppress transmission loss from increasing. A mean concentration or a concentration distribution of the alkali metal element is adjusted such that 0.48 or less is obtained as an weighted value obtained by weighting a distribution of field intensity of guided light at a wavelength of 1550 nm, with respect to a radial direction distribution of a ratio ID2/I?3 of an intensity ID2 of Raman scattering light by a silica three-membered ring structure and an intensity I?3 of Raman scattering light by a Si—O stretching vibration, in a cross-sectional region having a diameter of 20 ?m.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: March 6, 2018
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Tetsuya Haruna, Yoshiaki Tamura, Yoshihiro Tukuda
  • Patent number: 9869814
    Abstract: A hybrid optical fiber integrates features of multimode optical fibers and single-mode optical fibers. The hybrid optical fiber possesses an optical core having a first core region and a second core region to provide improved optical mode coupling ratio for single-mode transmission while maintaining a broad bandwidth for multimode transmission. The hybrid optical fiber's optical core may optionally include a depressed trench positioned between the optical core's first core region and the optical core's second core region to reduce modal dispersion and to improve modal bandwidth during multimode transmissions.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: January 16, 2018
    Assignee: Draka Comteq, B.V.
    Inventors: Denis Molin, Pierre Sansonetti, Pierre Sillard
  • Patent number: 9864139
    Abstract: A waveguide includes a segment with a substantially uniform cure profile and related methods and systems for making and using the same. The waveguide is formed by modifying a laser beam used to write the waveguide to provide a substantially uniform cure profile in the waveguide. A marker characteristic of laser writing may be present in the waveguide. A method or system modifies an intensity profile or a shape profile of a laser beam to proactively compensate for exposure convolution based on the characteristics of the laser beam spot profile. A convolution compensator is positioned in the path of the laser beam to modify the beam spot profile during writing to form the one or more segments of the waveguide in a photo-curable layer.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: January 9, 2018
    Assignee: Seagate Technology LLC
    Inventor: Richard C. A. Pitwon
  • Patent number: 9851499
    Abstract: An optical fiber with large effective area, low bending loss and low attenuation. The optical fiber includes a core, an inner cladding region, and an outer cladding region. The core region includes a spatially uniform updopant to minimize low Rayleigh scattering and a relative refractive index and radius configured to provide large effective area. The inner cladding region features a large trench volume to minimize bending loss. The core may be doped with Cl and the inner cladding region may be doped with F.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: December 26, 2017
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Hazel Benton Matthews, III, Snigdharaj Kumar Mishra, Pushkar Tandon
  • Patent number: 9851501
    Abstract: Disclosed herein are optical waveguide fibers comprising: (I) a core comprising an outer radius r1, a maximum refractive index delta percent ?1 max and core alpha, ?, of larger than 5; and (II) a cladding surrounding the core, the cladding comprising: (i) an inner cladding region having outer radius r2 and refractive index delta percent ?2, wherein ?1max>?2; (ii) a trench region surrounding the inner cladding region, the trench region having an outer radius, r3 where r3?10 microns and refractive index delta percent ?3; and (iii) an outer cladding region having chlorine concentration of ?1.2 wt. % surrounding the trench region and comprising refractive index delta percent ?4, wherein ?1max>?4 and ?2>?3, and ?4>?3 and wherein the difference between ?4 and ?3 is ?0.12 percent.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: December 26, 2017
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon
  • Patent number: 9841559
    Abstract: An optical fiber including a multimode core having a radius, R1, and a maximum relative refractive index, ?1MAX, at a wavelength ?0, an inner clad layer surrounding the core and having a radial thickness, T2, and a minimum relative refractive index, ?2MIN, of about 0.0% at a wavelength of ?0, an intermediate clad layer surrounding the inner clad layer and having a radial thickness, T3, and a maximum relative refractive index ?3MAX and an outer clad layer surrounding the inner clad layer and having a radial thickness, T4, and a maximum relative refractive index, ?4MIN, at a wavelength of ?0. The optical fiber satisfies the following relationship: ?1MAX>?3MAX>?2MIN, and the optical fiber exhibits an overfilled bandwidth of greater than or equal to about 1.5 GHz-km at ?0.
    Type: Grant
    Filed: February 10, 2017
    Date of Patent: December 12, 2017
    Assignee: Corning Incorporated
    Inventors: Snigdharaj Kumar Mishra, Oleksandr Kogan, Simit Mayank Patel, Elios Klemo, Daniel J Halvorson
  • Patent number: 9823420
    Abstract: An apparatus for converting fiber mode to waveguide mode. The apparatus includes a silicon substrate member and a dielectric member having an elongated body. Part of the elongated body from a back end overlies the silicon substrate member and remaining part of the elongated body up to a front end is separated from the silicon substrate member by a second dielectric material at an under region. The apparatus also includes a waveguide including a segment from the back end to a tail end formed on the dielectric member at least partially overlying the remaining part of the elongated body. The segment is buried in a cladding overlying entirely the dielectric member. The cladding has a refractive index that is less than the waveguide but includes an index-graded section with decreasing index that is formed at least over the segment from the tail end toward the back end.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: November 21, 2017
    Assignee: INPHI CORPORATION
    Inventors: Masaki Kato, Radhakrishnan L. Nagarajan
  • Patent number: 9822030
    Abstract: Annealing treatments for modified titania-silica glasses and the glasses produced by the annealing treatments. The annealing treatments include an isothermal hold that facilitates equalization of non-uniformities in fictive temperature caused by non-uniformities in modifier concentration in the glasses. The annealing treatments may also include heating the glass to a higher temperature following the isothermal hold and holding the glass at that temperature for several hours. Glasses produced by the annealing treatments exhibit high spatial uniformity of CTE, CTE slope, and fictive temperature, including in the presence of a spatially non-uniform concentration of modifier.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: November 21, 2017
    Assignee: Corning Incorporated
    Inventors: Sezhian Annamalai, Carlos Alberto Duran, Kenneth Edward Hrdina, William Rogers Rosch
  • Patent number: 9823422
    Abstract: An optical delivery waveguide for a material laser processing system includes a small lens at an output end of the delivery waveguide, transforming laser beam divergence inside the waveguide into a spot size after the lens. By varying the input convergence angle and/or launch angle of the laser beam launched into the waveguide, the output spot size can be continuously varied, thus enabling a continuous and real-time laser spot size adjustment on the workpiece, without having to replace the delivery waveguide or a process head. A divergence of the laser beam can also be adjusted dynamically and in concert with the spot size.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: November 21, 2017
    Assignees: LUMENTUM OPERATIONS LLC, AMADA HOLDINGS CO. LTD
    Inventors: Martin H. Muendel, Dahv Kliner
  • Patent number: 9804325
    Abstract: Described is a technique for optimizing the design and manufacture of broadband MMFs. MMFs for use in CWDM applications are specifically described.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: October 31, 2017
    Assignee: OFS FITEL, LLC
    Inventor: Kasyapa Balemarthy
  • Patent number: 9778419
    Abstract: An optical network having at least one star coupler comprising transmit and receive optical mixers which are respectively optically coupled to transmitters and receivers of a plurality of optical-electrical media converters. Each optical-electrical media converter comprises a respective receiver optically coupled to the receive optical mixer by way of plastic optical fibers and a respective transmitter optically coupled to the transmit optical mixer by way of plastic optical fibers. The output plastic optical fibers attached to an output face of the receive optical mixer have a diameter less than the diameter of the input plastic optical fibers attached to an input face of the receive optical mixer.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: October 3, 2017
    Assignee: The Boeing Company
    Inventors: Eric Y. Chan, Dennis G. Koshinz, Tuong K. Truong, Henry B. Pang
  • Patent number: 9766397
    Abstract: An optical fiber comprises a glass fiber including a core and a cladding surrounding the core, a non-strippable resin layer that adheres to and covers a surface of the glass fiber, and a buffer layer that covers the non-strippable resin layer, when pullout force measurement in which a length of 10 mm of each of the glass fiber and the non-strippable resin layer is pulled out at a tensile speed of 5 mm/min from the buffer layer is performed, a pullout force at 23° C. is 1.0 kg or less and a pullout force at 95° C. is 0.50 kg or less.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: September 19, 2017
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventor: Yuya Homma
  • Patent number: 9759860
    Abstract: An apparatus includes a multi-mode optical fiber having a selected plurality of optical propagating modes. The selected plurality may include only a proper subset of or may include all of the optical propagating modes of the multi-mode optical fiber. Each optical propagating mode of the selected plurality has a group velocity that varies over a corresponding range for light in, at least, one of the optical telecommunications C-band, the optical telecommunications L-band, and the optical telecommunications S-band. The ranges corresponding to different ones of the modes of the selected plurality are non-overlapping. The ranges of a group velocity-adjacent pair of the ranges are separated by a nonzero gap of less than about 10,000 meters per second.
    Type: Grant
    Filed: June 30, 2012
    Date of Patent: September 12, 2017
    Assignee: Alcatel Lucent
    Inventors: Rene'-Jean Essiambre, Roland Ryf
  • Patent number: 9759863
    Abstract: A waveguide a core extending along a light propagation and a coupling layer adjacent one side of the core along the light propagation direction. A gradient index material is adjacent to at least one side of the coupling layer. The gradient index material has a first refractive index proximate the coupling layer and a second refractive index away from the coupling layer. The gradient index material is configured to direct light from an input facet to the core layer.
    Type: Grant
    Filed: May 4, 2016
    Date of Patent: September 12, 2017
    Assignee: SEAGATE TECHNOLOGY LLC
    Inventors: Chubing Peng, Mark Ostrowski, Chang Xie, Tae-Woo Lee, Lisa M. Hanson
  • Patent number: 9733426
    Abstract: The present invention relates to an MMF with a structure for relaxing wavelength dependence of transmission bandwidth. In the MMF, a doping amount of a dopant for control of refractive index is adjusted, so as to make each of an OFL bandwidth at a wavelength of 850 nm and an OFL bandwidth at a wavelength of at least one of 980 nm, 1060 nm, and 1300 nm become not less than 1500 MHz·km, make the OFL bandwidth at the wavelength of at least one of 980 nm, 1060 nm, and 1300 nm become wider than the OFL bandwidth at the wavelength of 850 nm, and effectively suppress increase in transmission loss.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: August 15, 2017
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Kazuhiro Yonezawa, Tadashi Enomoto
  • Patent number: 9696508
    Abstract: An optical fiber cable has a sectional area of Ac [?m2] and housing a number N of optical fibers. A transmission loss ?dB [dB/km], a mode field diameter W [?m], an effective area Aeff [?m2], an effective length Leff [km], and a wavelength dispersion D [ps/nm/km] of each of the optical fibers at a wavelength of 1550 nm satisfy a predetermined equation.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: July 4, 2017
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yoshinori Yamamoto, Masaaki Hirano, Masakazu Takami
  • Patent number: 9671553
    Abstract: A multimode optical fiber includes a central core surrounded by an outer cladding. The central core has a graded-index profile with respect to the outer cladding and an outer radius r1 of between about 30 microns and 50 microns (e.g., between about 35 microns and 45 microns). The optical fiber also includes an inner cladding positioned between the central core and the outer cladding, and a depressed trench positioned between the inner cladding and the outer cladding. The multimode optical fiber exhibits reduced bending losses.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: June 6, 2017
    Assignee: Draka Comteq, B.V.
    Inventors: Denis Molin, Pierre Sillard, Marianne Bigot-Astruc, Frans Gooijer, Franciscus Johannes Achten
  • Patent number: 9658394
    Abstract: A single mode optical fiber having a core made from silica and less than or equal to about 6.5 weight % germania and having a maximum relative refractive index ?1MAX. The optical fiber also has an inner cladding surrounding the core and having a minimum relative refractive index ?2MIN. A difference between a softening point of the core and a softening point of the inner cladding is less than or equal to about 20° C., and ?1MAX>?2MIN. The single mode optical fiber may also have an outer cladding surrounding the inner cladding made from silica or SiON. The outer cladding has a maximum relative refractive index ?3MAX, and ?3MAX>?2MIN. A method for manufacturing an optical fiber includes providing a preform to a first furnace, the preform, drawing the optical fiber from the preform, and cooling the drawn optical fiber in a second furnace.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: May 23, 2017
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Hazel Benton Matthews, III, Pushkar Tandon
  • Patent number: 9632244
    Abstract: The present invention generally relates to the field of fiber optics, and more particularly, to apparatuses, systems, and methods directed towards improving effective modal bandwidth within a fiber optic communication environment. In an embodiment, a multimode optical fiber in accordance with the present invention comprises a core and cladding material system where the refractive indices of the core and cladding are selected to modify the shape of the profile dispersion parameter, y, as a function of wavelength in such a way that the alpha parameter (?-parameter), which defines the refractive index profile, produces negative relative group delays over a broad range of wavelengths. The new shape of the profile dispersion parameter departs from traditional fibers where the profile dispersion parameter monotonically decreases around the selected wavelength that maximizes the effective modal bandwidth (EMB).
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: April 25, 2017
    Assignee: Panduit Corp.
    Inventors: Jose M. Castro, Richard J. Pimpinella, Bulent Kose, Brett Lane
  • Patent number: 9625646
    Abstract: A multimode optical fiber is provides, which includes an optical core and an optical cladding surrounding the optical core. The optical core has a refractive graded-index profile. The optical cladding includes: an inner layer surrounding the optical core, an intermediate layer, called a “depressed trench”, surrounding the inner layer, and an outer layer surrounding the depressed trench and having a constant refractive index. The depressed trench has a width W and a negative refractive index difference ?nt with respect to the outer layer, and is designed so as to satisfy the following inequality: |0.585677?114.681×S+13.7287×S2+18.7343×S×W?4.61112×S×?nt.103?0.913789×W×?nt.103|+2×W×?nt.103<?30 wherein: S is the width of the inner cladding, which is included between 0.6 ?m and 1.6 ?m; ?nt is included between ?11.10?3 and ?4.10?3; and W×?nt.103 is lower than ?25 ?m.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: April 18, 2017
    Assignee: DRAKA COMTEQ BV
    Inventors: Denis Molin, Marianne Bigot-Astruc, Pierre Sillard, Franciscus Johannes Achten
  • Patent number: 9618692
    Abstract: An optical fiber having a core comprising silica and greater than 1.5 wt % chlorine and less than 0.5 wt % F, said core having a refractive index ?1MAX, and a inner cladding region having refractive index ?2MIN surrounding the core, where ?1MAX>?2MIN.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: April 11, 2017
    Assignee: Corning Incorporated
    Inventors: George Edward Berkey, Dana Craig Bookbinder, Ming-Jun Li, Pushkar Tandon
  • Patent number: 9599769
    Abstract: Embodiments of the invention relate to a hydrogen-resistant optical fiber with a core having a central axis. The core may include only silica, or only silica and fluorine, while a cladding region surrounding the core may be made of silica and fluorine, along with at least one of germanium, phosphorus, and titanium.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: March 21, 2017
    Assignee: VERRILLON, INC.
    Inventors: William Jacobsen, Abdelouahed Soufiane
  • Patent number: 9594210
    Abstract: An optical fiber with large effective area, low bending loss and low attenuation. The optical fiber includes a core, an inner cladding region, and an outer cladding region. The core region includes a spatially uniform updopant to minimize low Rayleigh scattering and a relative refractive index and radius configured to provide large effective area. The inner cladding region features a large trench volume to minimize bending loss. The core may be doped with Cl and the inner cladding region may be doped with F.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: March 14, 2017
    Assignee: Corning Incorporated
    Inventors: Dana Craig Bookbinder, Ming-Jun Li, Hazel Benton Matthews, III, Snigdharaj Kumar Mishra, Pushkar Tandon
  • Patent number: 9568669
    Abstract: The specification describes multimode optical fibers with specific design parameters, i.e., controlled refractive index design ratios and dimensions, which render the optical fibers largely immune to moderately severe bends. The modal structure in the optical fibers is also largely unaffected by bending, thus leaving the optical fiber bandwidth essentially unimpaired. Bend performance results were established by DMD measurements of fibers wound on mandrels vs. measurements of fibers with no severe bends. Additional embodiments of the present invention describe an improved optical link when the inventive multimode fiber is connected to standard or conventional multimode fibers.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: February 14, 2017
    Assignee: OFS FITEL, LLC
    Inventors: Xinli Jiang, Durgesh S. Vaidya, George E. Oulundsen
  • Patent number: 9554694
    Abstract: Methods and apparatus for delivering a neurostimulator to a target tissue are provided which may include any number of features. One feature is a delivery tool comprising a handle portion, an elongate shaft comprising a contoured distal portion, a visualization system embedded in the elongate shaft, and an insertion groove on the elongate shaft configured to deploy the neurostimulator. The contoured distal portion can be shaped and configured to maintain contact with a posterior maxilla and elevate a periosteum off of the posterior maxilla to avoid soft tissue dissection. In some embodiments, the neurostimulator is implanted in close proximity to or touching the sphenopalatine ganglion.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: January 31, 2017
    Assignee: Autonomic Technologies, Inc.
    Inventors: Benjamin David Pless, Carl Lance Boling, Anthony V. Caparso
  • Patent number: 9547129
    Abstract: An apparatus for converting fiber mode to waveguide mode. The apparatus includes a silicon substrate member and a dielectric member having an elongated body. Part of the elongated body from a back end overlies the silicon substrate member and remaining part of the elongated body up to a front end is separated from the silicon substrate member by a second dielectric material at an under region. The apparatus also includes a waveguide including a segment from the back end to a tail end formed on the dielectric member at least partially overlying the remaining part of the elongated body. The segment is buried in a cladding overlying entirely the dielectric member. The cladding has a refractive index that is less than the waveguide but includes an index-graded section with decreasing index that is formed at least over the segment from the tail end toward the back end.
    Type: Grant
    Filed: January 21, 2015
    Date of Patent: January 17, 2017
    Assignee: INPHI CORPORATION
    Inventors: Masaki Kato, Radhakrishnan L. Nagarajan