Of Waveguide Cladding Patents (Class 385/144)
  • Patent number: 9746387
    Abstract: A machine arrangement, including at least one bearing ring, wherein a glass fiber is connected with the machine arrangement. To allow a proper measurement of stresses, even at curved surfaces of the machine arrangement as it is typical in the case of bearing rings, the connection between the glass fiber and the machine arrangement is established by a glass material. The glass material is connected by material bonding with the machine arrangement as well as with the glass fiber.
    Type: Grant
    Filed: June 12, 2013
    Date of Patent: August 29, 2017
    Assignee: AKTIEBOLAGET SKF
    Inventors: Hongyu Yang, John F. van de Sanden, Hendrik Anne Mol
  • Patent number: 9533912
    Abstract: Boron-containing network sulfide glass which may be useful in IR transmitting applications, such as IR optics, laser or fiber amplifiers doped with rare earths with emission in the near IR, and methods of making the same.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: January 3, 2017
    Assignee: Corning Incorporated
    Inventors: Bruce Gardiner Aitken, Stephen Charles Currie, Randall Eugene Youngman
  • Patent number: 8909020
    Abstract: The present invention relates to a liquid crystal display including a pixel electrode including a first subpixel electrode and a second subpixel electrode spaced apart with a gap therebetween, a common electrode facing the pixel electrode, and a liquid crystal layer formed between the pixel electrode and the common electrode and including a plurality of liquid crystal molecules. The first and second subpixel electrodes include a plurality of branches, and each of the first and second subpixel electrodes includes a plurality of subregions. The branches extend in different directions in different subregions.
    Type: Grant
    Filed: November 12, 2013
    Date of Patent: December 9, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Mee-Hye Jung, Ji-Won Sohn, Jae-Jin Lyu, Chong-Chul Chai
  • Patent number: 8895335
    Abstract: A method for impurity-induced disordering in III-nitride materials comprises growing a III-nitride heterostructure at a growth temperature and doping the heterostructure layers with a dopant during or after the growth of the heterostructure and post-growth annealing of the heterostructure. The post-growth annealing temperature can be sufficiently high to induce disorder of the heterostructure layer interfaces.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: November 25, 2014
    Assignee: Sandia Corporation
    Inventors: Jonathan J. Wierer, Jr., Andrew A. Allerman
  • Patent number: 8891925
    Abstract: An optical fiber having both low macrobend loss and low microbend loss. The fiber has a first inner cladding region having an outer radius r2>8 microns and refractive index ?2 and a second outer cladding region surrounding the inner cladding region having refractive index ?4, wherein ?1>?4>?2. The difference between ?4 and ?2 is greater than 0.002 percent. The fiber exhibits a 22 m cable cutoff less than or equal to 1260 nm, and r1/r2 is greater or equal to 0.25.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: November 18, 2014
    Assignee: Corning Incorporated
    Inventors: Scott Robertson Bickham, Dana Craig Bookbinder, Jeffrey Coon, Ming-Jun Li, Snigdharaj Kumar Mishra, Pushkar Tandon, James Andrew West
  • Patent number: 8865078
    Abstract: An apparatus for detecting an object capable of emitting light. The apparatus includes a light source and a waveguide. The waveguide includes a core layer and a first cladding layer. At least one nanowell is formed in at least the first cladding layer. The apparatus further includes a light detector. The light detector can detect a light emitted from a single molecule object contained in the at least one nanowell.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: October 21, 2014
    Assignee: Industrial Technology Research Institute
    Inventors: Chung-Fan Chiou, Rung-Ywan Tsai, Yu-Tang Li, Chih-Tsung Shih, Ming-Chia Li, Chang-Sheng Chu, Shuang-Chao Chung, Jung-Po Chen, Ying-Chih Pu
  • Patent number: 8865077
    Abstract: An apparatus for detecting an object capable of emitting light. The apparatus comprises a light source and a waveguide. The waveguide comprises a core layer and a first cladding layer. At least one nanowell is formed in at least the first cladding layer. The apparatus further comprises a light detector. The light detector can detect a light emitted from a single molecule object contained in the at least one nanowell.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: October 21, 2014
    Assignee: Industrial Technology Research Institute
    Inventors: Chung-Fan Chiou, Rung-Ywan Tsai, Yu-Tang Li, Chih-Tsung Shih, Ming-Chia Li, Chang-Sheng Chu, Shuang-Chao Chung, Jung-Po Chen, Ying-Chih Pu
  • Patent number: 8798412
    Abstract: Disclosed is an optical fiber having a core with an alkali metal oxide dopant in an peak amount greater than about 0.002 wt. % and less than about 0.1 wt. %. The alkali metal oxide concentration varies with a radius of the optical fiber. By appropriately selecting the concentration of alkali metal oxide dopant in the core and the cladding, a low loss optical fiber may be obtained. Also disclosed are several methods of making the optical fiber including the steps of forming an alkali metal oxide-doped rod, and adding additional glass to form a draw perform. Preferably, the draw preform has a final outer dimension (d2), wherein an outer dimension (d1) of the rod is less than or equal to 0.06 times the final outer dimension (d2). In a preferred embodiment, the alkali metal oxide-doped rod is inserted into the centerline hole of a preform to form an assembly.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: August 5, 2014
    Assignee: Corning Incorporated
    Inventors: Dana C. Bookbinder, Lisa C. Chacon, Adam J. G. Ellison, Rostislav R. Khrapko, Stephan L. Logunov, Michael T. Murtagh, Sabyasachi Sen
  • Patent number: 8768128
    Abstract: The specification describes an optical fiber color coding scheme that uses two colors, where each of the two colors constitutes one half of the surface of the optical fiber coating. If a longitudinal portion of the coating is considered a hollow cylinder, then each of the two colors is a hollow hemi-cylinder. To ensure that each of the two colors is always plainly visible to an installer, the two colors are formed with a twist. Using two colors for coding substantially increases the number of available unique color codes. Coloring the entire coating reduces the chances of error in identifying the optical fibers.
    Type: Grant
    Filed: January 22, 2013
    Date of Patent: July 1, 2014
    Assignee: OFS Fitel, LLC
    Inventors: Harry D Garner, Jonathan M Jobe, Kariofilis Konstadinidis
  • Patent number: 8755642
    Abstract: Fiber-amplifier device the light-path of which is devoid of a free-space element. The system device an all-fiber-optic Faraday rotator and isolator. The device has a multicomponent glass optical fiber having a core having a first doping concentration of 55%-85% (wt./wt.) of a first rare-earth oxide and a the isolator includes at least three magnetic cells with throughout bores hosting an optical fiber, the same magnetic poles of two immediately neighboring cells facing each other. The first rare-earth oxide includes one or more of Pr2O3, Nd2O3, Pm2O3, Sm2O3, Eu2O3, Gd2O3, Tb2O3, Dy2O3, Ho2O3, Er2O3, Tm2O3, Yb2O3, La2O3, Ga2O3, Ce2O3, and Lu2O3.
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: June 17, 2014
    Assignee: AdValue Photonics, Inc.
    Inventor: Shibin Jiang
  • Patent number: 8750655
    Abstract: An optical fiber may be constructed of a material having at least first and second constituents. The constituents and their relative abundance are selected such that the aggregate Brillouin frequency-shift response exhibited by a fiber constructed using the combined material is insensitive to a selected physical condition, such as temperature or strain, or the sensitivity is below an acceptable application-specific level, over an acceptable range of conditions. The constituents are selected such that the slopes or derivatives of the Brillouin frequency-shift response (with respect to the selected physical condition) of two of the constituents have opposite signs, and are combined in proper quantities such that the constituents balance each other to reduce the slope or derivative of the aggregate Brillouin frequency-shift response of the combined material to zero, or to an acceptable application-specific level, over an acceptable range of conditions.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: June 10, 2014
    Inventor: Peter Dragic
  • Patent number: 8721969
    Abstract: An apparatus for detecting an object capable of emitting light. The apparatus comprises a light source and a waveguide. The waveguide comprises a core layer and a first cladding layer. At least one nanowell is formed in at least the first cladding layer. The apparatus further comprises a light detector. The light detector can detect a light emitted from a single molecule object contained in the at least one nanowell.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: May 13, 2014
    Assignee: Industrial Technology Research Institute
    Inventors: Chung-Fan Chiou, Rung-Ywan Tsai, Yu-Tang Li, Chih-Tsung Shih, Ming-Chia Li, Chang-Sheng Chu, Shuang-Chao Chung, Jung-Po Chen, Ying-Chih Pu
  • Patent number: 8693832
    Abstract: The present invention provides an optical fiber which can have a larger NA and a preferable mechanical strength even with a monolayer coating and can be fabricated at low cost, and which can transmit excitation light efficiently reducing a loss even under a high temperature environment during the operation of a fiber laser. An optical fiber according to an embodiment of the present invention includes a core, a glass cladding which is provided at a periphery of the core and has a refractive index smaller than the core, and a polymer cladding which is provided at a periphery of the glass cladding and has a refractive index smaller than the glass cladding. The polymer cladding contains fluorine and the polymer cladding has a difference between an elasticity modulus at 60° C. and that at 23° C. equal to or smaller than 100 MPa and also has an elasticity modulus equal to or larger than 200 MPa at 23° C.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: April 8, 2014
    Assignee: Furukawa Electric Co., Ltd.
    Inventors: Masanobu Nakamura, Yoshihiro Arashitani
  • Patent number: 8682127
    Abstract: Described is a modular method of making an optical fiber comprising a core and a cladding configured to support and guide a fundamental transverse mode, the cladding including (i) an outer cladding having an index nout less than the index n1 of the core, (ii) an inner cladding having an index n2<nout, (iii) a pedestal having an index n4?nout, (iv) an inner trench disposed between the inner cladding and the pedestal, the inner trench having an index n3<<n4, and (iv) an outer trench disposed between the pedestal and the outer cladding, the outer trench having an index n5<n4 and relatively close to nout. To suppress unwanted HOMs the pedestal is configured to resonantly couple at least one unwanted transverse mode of the core (other than the fundamental mode) to at least one transverse mode of the pedestal.
    Type: Grant
    Filed: May 14, 2013
    Date of Patent: March 25, 2014
    Assignee: OFS Fitel, LLC
    Inventors: John M. Fini, Robert L. Lingle, Jr., Yi Sun
  • Patent number: 8676023
    Abstract: The present invention discloses a method for fabricating polymeric wavelength filter based on an asymmetric Bragg coupler with single-grating waveguide. The asymmetric waveguide coupler is formed firstly on a negative photo-resist mold. PDMS film is injected into the narrow waveguide of the coupler to act as a protection layer. The gratings pattern is exposed on the alternative waveguide and subsequently transferred to PDMS stamp mold. The PDMS stamp mold is used as a stamp to transfer the gratings pattern of the ABC wavelength filter onto UV cured polymer to form the final ABC filter. Whereby, the fabrication process is reliable and accurate, and can offer great potential for mass production of the ABC filter with single-grating waveguide.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: March 18, 2014
    Assignee: National Formosa University
    Inventor: Wei-Ching Chuang
  • Patent number: 8617300
    Abstract: The invention relates to a filtering media having a photocatalytic action which has a thickness of at least 2 mm, which is homogeneous and which is devoid of orifice apparent to the naked eye, comprising a felt of inorganic fibers, the fibers of which are coated with a coating comprising a catalyst having a photocatalytic action, said felt exhibiting a weight per unit area of between 30 and 80 g/m2, said coating representing 5 to 80% of the weight of said media, said media exhibiting a gas pressure drop of less than 150 Pa at 1 m/s in unpleated condition. This media is intended to be incorporated in a purifier of gas, such as air, furthermore comprising a system for illuminating said media with UV radiation. The media exhibits an excellent purification efficiency and a very low pressure drop.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: December 31, 2013
    Assignee: Saint-Gobain Quartz S.A.S.
    Inventors: Jean-Paul Riviere, Paul Sargood, Laurent Molins
  • Patent number: 8611714
    Abstract: [Object] The present invention has the object of providing an optical fiber enabling high-speed communication, that exhibits superior transparency and excellent flexibility, and that includes trichloroethyl methacrylate as a main component of the core portion monomer. [Means for Solving Problem] An optical fiber configured from a core portion and a cladding portion disposed on an outer periphery of the core portion, wherein the core portion is formed by a main constituent component of a polymer of monomers that include at least 70 wt % of trichloroethyl methacrylate (TCEMA), the cladding portion is formed by a main constituent component of a polymer of monomers which include at least 20 wt % of methyl methacrylate (MMA).
    Type: Grant
    Filed: July 5, 2010
    Date of Patent: December 17, 2013
    Assignees: Sekisui Chemical Co., Ltd., Keio University
    Inventors: Hirotsugu Yoshida, Ryosuke Nakao, Hiroka Inabe, Tazuru Okamoto, Yuki Masabe, Masato Aoyama, Yasuhiro Koike
  • Patent number: 8600210
    Abstract: A GI type optical fiber of the present invention is a GI type optical fiber having a core component and a cladding component disposed around the outer periphery of the core component, the core component includes a polymer containing at least 55 wt % chlorostyrene monomer and a dopant, and the cladding component includes a polymer of a monomer containing at least 35 wt % methyl methacrylate. It is an object of the present invention to provide a GI type optical fiber in which chlorostyrene is used as the predominant component of the monomer that constitutes the core component, and therefore has excellent transparency and good flexibility, and allows high-speed communication.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: December 3, 2013
    Assignees: Sekisui Chemical Co., Ltd., Keio University
    Inventors: Hirotsugu Yoshida, Tazuru Okamoto, Ryosuke Nakao, Hiroka Inabe, Yuki Masabe, Yasuhiro Koike
  • Publication number: 20130287355
    Abstract: The present invention relates to an optical fiber for an SPR sensor, characterized in that the optical fiber is comprised of a core layer and a cladding layer surrounding the core layer, and the cladding layer is doped with metal nanoparticles.
    Type: Application
    Filed: April 18, 2011
    Publication date: October 31, 2013
    Applicant: Gwangju Institute of Science and Technology
    Inventors: Won Taek Han, Seongmin Ju
  • Patent number: 8538230
    Abstract: The present invention provides a resin composition and film for forming a cladding layer of an optical waveguide, which composition contains (A) a (meth)acrylic polymer having a weight average molecular weight more than 100,000, (B) a urethane (meth)acrylate, and (D) a radical polymerization initiator; and an optical waveguide and an optical module produced by use of the composition or film. There can be provided a resin composition for forming a cladding layer and a resin film for forming a cladding layer, which exhibit excellent bending durability and twisting durability, and an optical waveguide and an optical module each produced therefrom.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: September 17, 2013
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Masami Ochiai, Tatsuya Makino, Toshihiko Takasaki, Atsushi Takahashi
  • Patent number: 8532455
    Abstract: An optical fiber includes a core (1a) having an oblong rectangular or square cross section and made of quartz, a cladding (2) surrounding the core (1a), having a circular outer cross-sectional shape, having a lower refractive index than the core (1a), and made of resin, and a support layer (3) surrounding the cladding (2) and made of quartz.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: September 10, 2013
    Assignee: Mitsubishi Cable Industries, Ltd.
    Inventors: Tadahiko Nakai, Takaharu Kinoshita, Takeshi Satake, Takeji Akutsu, Motohiko Yamasaki
  • Patent number: 8509574
    Abstract: An all-fiber optic Faraday rotator and isolator is presented. The device has a multicomponent glass optical fiber having a core having a first doping concentration of 55%-85% (wt./wt.) of a first rare-earth oxide and a cladding having a section doping concentration of 55%-85% (wt./wt.) of a second rare-earth oxide, where the first rare-earth oxide and the second rare earth oxide are one or more of Pr2O3, Nd2O3, Pm2O3, Sm2O3, Eu2O3, Gd2O3, Tb2O3, Dy2O3, Ho2O3, Er2O3, Tm2O3, Yb2O3, La2O3, Ga2O3, Ce2O3, and Lu2O3, and where the refractive index of the cladding is lower than a refractive index of the core. The fiber optic device further includes multiple magnetic cells each formed to include a bore extending there through, where the fiber is disposed in the bore of one of the magnetic cells.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: August 13, 2013
    Assignee: AdValue Photonics, Inc.
    Inventors: Shibin Jiang, Jihong Geng, Zhuo Jiang, Tao Luo
  • Patent number: 8475920
    Abstract: Cable including at least one core comprising at least one transmissive element and at least one coating layer made of a coating material, wherein said coating material comprises: —at least one polyethylene; —at least one non-ionic surfactant having the following general formula (I): wherein: —Q is a p-functional group; —R is a linear or branched C1-C4 alkyl group, preferably a methyl group; —R1 is a hydrogen atom or a linear or branched C1-C6 alkyl group, preferably a hydrogen atom; —n is an integer from 2 to 5 inclusive, preferably 2; —x is an integer from 5 to 500 inclusive, preferably from 10 to 300 inclusive; —y is an integer from 0 to 500 inclusive, preferably from 10 to 300 inclusive; —z is an integer from 0 to 500 inclusive, preferably from 10 to 300 inclusive; —y+z is not lower than 2; —p is an integer from 1 to 4 inclusive, preferably 1 or 4; provided that, when the transmissive element is an electrical energy transmissive element, said at least one coating layer is an external sheathing layer.
    Type: Grant
    Filed: June 28, 2004
    Date of Patent: July 2, 2013
    Assignee: Prysmian Cavi E Sistemi Energia SRL
    Inventors: Andrea Pelizzoni, Luca Castellani, Franco Peruzzotti, Cristiano Puppi
  • Patent number: 8470959
    Abstract: A novel polyimide compound which has a low linear expansion coefficient and permits film formation by a spin coating method or the like, a preparation method for the polyimide compound, and an optical film and an optical waveguide produced by employing the compound. The polyimide compound has a structural unit represented by the following general formula (1): wherein X is a covalent single bond, —CH2—, —C(CF3)2— or —CR(R?)— (wherein R and R?, which may be the same or different, are each a C1 to C6 alkyl group or an aryl group); A and B, which may be the same or different, are substituents each selected from a hydroxyl group, a halogen group and a C1 to C4 alkyl group; a and b, which are the numbers of the substituents A and B, respectively, are each an integer of 0 to 2; and o, p and q are each an integer of 1 to 5.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: June 25, 2013
    Assignee: Nitto Denko Corporation
    Inventors: Tomoyuki Hirayama, Junichi Fujisawa
  • Patent number: 8472770
    Abstract: Optical fiber comprises core and a cladding configured to support and guide a fundamental transverse mode, the cladding including (i) an outer cladding having an index nout less than the index n1 of the core, (ii) an inner cladding having an index n2<nout, (iii) a pedestal having an index n4˜nout, (iv) an inner trench disposed between the inner cladding and the pedestal, the inner trench having an index n3<<n4, and (iv) an outer trench disposed between the pedestal and the outer cladding, the outer trench having an index n5<n4 and relatively close to nout. To suppress unwanted HOMs the pedestal is configured to resonantly couple at least one unwanted transverse mode of the core (other than the fundamental mode) to at least one transverse mode of the pedestal. Also described is a modular method of making the optical fiber of silica glass.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: June 25, 2013
    Assignee: OFS Fitel, LLC
    Inventors: John Michael Fini, Robert Lee Lingle, Jr., Yi Sun
  • Patent number: 8442372
    Abstract: The microstructured optical fibre comprises a core (4) surrounded by a sheath (1) comprising a base material having a refraction index (ni) and a plurality of at least two different types of inclusion: a first type of inclusion (2) having a refraction index n2 (n2>n1), and a second type of inclusion (3) having a refraction index n3 (n3<n1). The inclusions (2, 3) are arranged and dimensioned in such a way as to ensure guidance, by total internal reflection (RTI), of a fundamental mode of the light, centred on a wavelength ?RTI, and of a fundamental mode of the light in the first photonic forbidden band (BG1), centred on a wavelength ?BG1, which is different to that ?RTI of the fundamental mode guided by total internal reflection (RTI).
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: May 14, 2013
    Assignee: Universite des Sciences et Technologies de Lille
    Inventors: Yves Quiquempois, Geraud Bouwmans, Mathias Perrin, Aurelie Betourne, Marc Douay, Karen Delplace, Antoine Le Rouge, Laurent Bigot
  • Patent number: 8433169
    Abstract: An optical fiber that is relatively insensitive to bend loss comprises a core region and a cladding region configured to support and guide the propagation of light in a fundamental transverse mode, the cladding region including (i) an outer cladding region having a refractive index less than that of the core region, (ii) an annular cladding pedestal region having a refractive index higher than that of the outer cladding region and comparable to that of the core region, and (iii) an annular cladding inner trench region disposed between the core region and the pedestal region, the inner trench region having a refractive index less than that of the outer cladding region. In one embodiment, the fiber also includes a (iv) an annular cladding outer trench region disposed between the pedestal region and the outer cladding region, the outer trench region having a refractive index less than that of the outer cladding region.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: April 30, 2013
    Assignee: OFS Fitel, LLC
    Inventors: John Michael Fini, Poul Kristensen
  • Patent number: 8426020
    Abstract: The invention provides an optical fiber coated with a Supercoating, wherein the Supercoating comprises at least two layers, wherein the first layer is a Primary Coating that is in contact with the outer surface of the optical fiber and the second layer is a Secondary Coating in contact with the outer surface of the Primary Coating, wherein the cured Primary Coating on the optical fiber has the following properties after initial cure and after one month aging at 85° C. and 85% relative humidity: A) a % RAU of from about 84% to about 99%; B) an in-situ modulus of between about 0.15 MPa and about 0.60 MPa; and C) a Tube Tg, of from about ?25° C. to about ?55° C.; wherein the cured Secondary Coating on the optical fiber has the following properties after initial cure and after one month aging at 85° C. and 85% relative humidity: A) a % RAU of from about 80% to about 98%; B) an in-situ modulus of between about 0.60 GPa and about 1.90 GPa; and C) a Tube Tg, of from about 50° C. to about 80° C.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: April 23, 2013
    Assignee: DSM IP Assets B.V.
    Inventors: Steven R. Schmid, Petrus Jacobus Hubertus Niels, Paulus Antonius Maria Steeman, Xiaosong Wu, Wendell Wayne Cattron, Tyson Dean Norlin, Edward J. Murphy, John M. Zimmerman, Anthony Joseph Tortorello
  • Patent number: 8385705
    Abstract: Disclosed is an improved, single-mode optical fiber possessing a novel coating system. When combined with a bend-insensitive glass fiber, the novel coating system according to the present invention yields an optical fiber having exceptionally low losses. The coating system features (i) a softer primary coating with excellent low-temperature characteristics to protect against microbending in any environment and in the toughest physical situations and, optionally, (ii) a colored secondary coating possessing enhanced color strength and vividness. The secondary coating provides improved ribbon characteristics for structures that are robust, yet easily entered (i.e., separated and stripped). The optional dual coating is specifically balanced for superior heat stripping in fiber ribbons, with virtually no residue left behind on the glass. This facilitates fast splicing and terminations.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: February 26, 2013
    Assignee: Draka Comteq, B.V.
    Inventors: Bob J. Overton, Louis-Anne de Montmorillon, Simon Richard, Denis Molin, Marianne Bigot-Astruc, Pierre Sillard, David Boivin
  • Patent number: 8383695
    Abstract: The present invention relates to a phenoxy resin for an optical material obtained by subjecting at least one selected from specific difunctional epoxy resins and at least one selected from specific difunctional phenols to polyaddition reaction, wherein a film comprising the above phenoxy resin has a refractive index of 1.580 or less at 25° C. and a wavelength of 830 nm, a resin composition for an optical material containing the above phenoxy resin, a resin film for an optical material comprising the above resin composition and an optical waveguide produced by using the above resin composition and/or the above resin film.
    Type: Grant
    Filed: March 15, 2007
    Date of Patent: February 26, 2013
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Tatsuya Makino, Atsushi Takahashi, Toshihiko Takasaki, Tomoaki Shibata, Masami Ochiai
  • Patent number: 8380020
    Abstract: The planar optical structure forms an evanescent-field measuring platform. A body is made from the thermoplastic plastic with a three-dimensionally structured surface, wherein molding is performed directly from a master made of glass coated with metal oxide, without deposition of further coatings on a surface of the master. The planar optical structure forming an evanescent-field measuring platform has a first essentially optically transparent, waveguiding layer (a) with a refractive index n1 and a second essentially optical transparent layer (b) with refractive index n2, where n1>n2, in a case of an embodiment of a planar optical film waveguide, or a metal layer (a?) and a second layer (b), in a case of an embodiment for generating a surface plasmon resonance, wherein the second layer (b) includes a material from a group of cyclo-olefin polymers and cyclo-olefin copolymers.
    Type: Grant
    Filed: June 21, 2010
    Date of Patent: February 19, 2013
    Assignees: Weidmann Plastics Technology AG, Bayer Intellectual Property GmbH
    Inventors: Tilo Callenbach, Max Gmür, Heinz Lüthi, Martin Andreas Bopp, Michael Pawlak, Markus Ehrat
  • Patent number: 8374468
    Abstract: An all-fiber Faraday rotator array comprising a plurality of Faraday rotating fibers, each having a doping concentration of 55%-85% (wt./wt.) of a rare-earth oxide, and a magnetic tube surrounding the plurality of Faraday rotating fibers is presented. The rare-earth oxide is selected from the group comprising: Pr2O3, Nd2O3, Pm2O3, Sm2O3, Eu2O3, Gd2O3, Tb2O3, Dy2O3, Ho2O3; Er2O3, Tm2O3, Yb2O3, La2O3, Ga2O3, Ce2O3, and Lu2O3. Additionally, an all-fiber isolator using highly rare-earth oxide doped fibers is disclosed.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: February 12, 2013
    Assignee: AdValue Photonics, Inc.
    Inventor: Shibin Jiang
  • Patent number: 8374472
    Abstract: An optical fiber that is relatively insensitive to bend loss comprises a core region and a cladding region configured to support and guide the propagation of light in a fundamental transverse mode, the cladding region including (i) an outer cladding region having a refractive index less than that of the core region, (ii) an annular cladding pedestal region having a refractive index higher than that of the outer cladding region and comparable to that of the core region, and (iii) an annular cladding inner trench region disposed between the core region and the pedestal region, the inner trench region having a refractive index less than that of the outer cladding region. In one embodiment, the fiber also includes a (iv) an annular cladding outer trench region disposed between the pedestal region and the outer cladding region, the outer trench region having a refractive index less than that of the outer cladding region.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: February 12, 2013
    Assignee: OFS Fitel, LLC
    Inventors: John Michael Fini, Poul Kristensen
  • Patent number: 8364001
    Abstract: A polymer optical waveguide includes: at least one core through which light propagates; a cladding which surrounds the core and has a refractive index less than that of the core; at least one conductive wire being provided on at least one side of the cladding, the polymer optical waveguide having a sheet shape, the conductive wire including a conductive layer which is provided on the at least one side of the cladding and being partitioned by a first groove, and the core being formed between second grooves each of which is formed in at least a part of the first groove.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: January 29, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Akira Fujii, Shigemi Ohtsu, Keishi Shimizu, Kazutoshi Yatsuda, Toshihiko Suzuki, Masahiro Igusa
  • Patent number: 8354583
    Abstract: A solar energy conversion system is presented. The system comprises at least one waveguide arrangement having at least one light input respectively. The waveguide arrangement comprises a core unit for passing input solar radiation therethrough and a cladding material arrangement interfacing with the core therealong. The cladding material arrangement is configured as an array of spaced-apart solar cells arranged along the core unit and having different optical absorption ranges, such that an interface between the waveguide core and the cladding arrangement spectrally splits the photons of the input solar radiation by causing the photons of different wavelengths, while passing through the core unit, to be successively absorbed and thereby converted into electricity by the successive solar cells of said array.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: January 15, 2013
    Assignees: Bar Ilan University, Yeda Research and Development Company Ltd, The Regents of The University of California
    Inventors: Arie Zaban, David Cahen, Igor Lubomirsky, Oscar M. Stafsudd
  • Publication number: 20130004137
    Abstract: A low index of refraction hybrid optical cladding may be formed from a fluorinated sol-gel. An electro-optic device may include a poled organic chromophore-loaded modulation layer (electro-optic polymer) and at least one adjacent fluorinated hybrid sol-gel cladding layer.
    Type: Application
    Filed: March 28, 2012
    Publication date: January 3, 2013
    Applicant: Gigoptix, Inc.
    Inventors: Danliang Jin, Guomin Yu, Hui Chen, Baoquan Chen
  • Patent number: 8343619
    Abstract: An optical waveguide film is provided having a cross-sectional structure wherein claddings composed of a thermoplastic resin B and dispersions (cores) composed of a thermoplastic resin A extend in the machine direction of the film and are arrayed in the transverse direction of the film, the optical waveguide film comprising not less than 3 cores, diameters (We1, We2) of cores located at the both ends in the transverse direction of the film and diameter (Wc) of a core in the central portion in the transverse direction of the film satisfying the following Formulae (1) and (2), the optical waveguide film comprising a continuous cladding layer at at least one side thereof, the thicknesses of the cladding layers (Te1, Te2) at the both ends thereof in the transverse direction of the film and the thickness (Tc) of the cladding layer in the central portion in the transverse direction of the film satisfying the following Formulae (3) and (4): 0.8?We1/Wc?1.2??Formula (1) 0.8?We2/Wc?1.2??Formula (2) 0.8?Te1/Tc?1.
    Type: Grant
    Filed: September 12, 2007
    Date of Patent: January 1, 2013
    Assignee: Toray Industries, Inc.
    Inventors: Wataru Gouda, Shunichi Osada, Masatoshi Oyama
  • Patent number: 8346029
    Abstract: A multicomponent glass fiber having a doping concentration of 55%-85% (wt./wt.) of a rare-earth oxide is presented. The rare-earth oxide is selected from the group comprising: Pr2O3, Nd2O3, Pm2O3, Sm2O3, Eu2O3, Gd2O3, Tb2O3, Dy2O3, Ho2O3; Er2O3, Tm2O3, Yb2O3, La2O3, Ga2O3, Ce2O3, and Lu2O3. Additionally, an all-fiber isolator using highly rare-earth oxide doped fibers is disclosed.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: January 1, 2013
    Assignee: AdValue Photonics, Inc.
    Inventor: Shibin Jiang
  • Patent number: 8326104
    Abstract: The present disclosure relates to a telecommunications cable having a layer constructed to resist post-extrusion shrinkage. The layer includes a plurality of discrete shrinkage-reduction members embedded within a base material. The shrinkage-reduction members can be made of a liquid crystal polymer. The disclosure also relates to a method for manufacturing telecommunications cables having layers adapted to resist post-extrusion shrinkage.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: December 4, 2012
    Assignee: ADC Telecommunications, Inc.
    Inventor: Wayne M. Kachmar
  • Patent number: 8326106
    Abstract: An optical fiber that is relatively insensitive to bend loss comprises a core region and a cladding region configured to support and guide the propagation of light in a fundamental transverse mode, the cladding region including (i) an outer cladding region having a refractive index less than that of the core region, (ii) an annular cladding pedestal region having a refractive index higher than that of the outer cladding region and comparable to that of the core region, and (iii) an annular cladding inner trench region disposed between the core region and the pedestal region, the inner trench region having a refractive index less than that of the outer cladding region. In one embodiment, the fiber also includes a (iv) an annular cladding outer trench region disposed between the pedestal region and the outer cladding region, the outer trench region having a refractive index less than that of the outer cladding region.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: December 4, 2012
    Assignee: OFS Fltel, LLC
    Inventors: John Michael Fini, Poul Kristensen
  • Patent number: 8326110
    Abstract: Disclosed, among other features, is a flexible optical waveguide, having one resin film for forming a core layer and two resin films for forming a cladding layer. At least one of the resin films for forming the cladding layer is composed of a resin for forming a cladding layer and a base material film, and the base material film is arranged on an outer side of the cladding layer with respect to the core layer.
    Type: Grant
    Filed: July 1, 2010
    Date of Patent: December 4, 2012
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Tomoaki Shibata, Tatsuya Makino, Masami Ochiai, Atsushi Takahashi, Toshihiko Takasaki
  • Patent number: 8320726
    Abstract: Described are multi-tube fabrication techniques for making an optical fiber that is relatively insensitive to bend loss and alleviates the problem of catastrophic bend loss comprises a core region and a cladding region configured to support and guide the propagation of light in a fundamental transverse mode. The cladding region includes (i) an outer cladding region, (ii) an annular pedestal (or ring) region, (iii) an annular inner trench region, and (iv) an annular outer trench region. The pedestal region and the outer cladding region each have a refractive index relatively close to that of the outer cladding region. In order to suppress HOMs the pedestal region is configured to resonantly couple at least one (unwanted) transverse mode of the core region (other than the fundamental mode) to at least one transverse mode of the pedestal region.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: November 27, 2012
    Assignee: OFS Fitel, LLC
    Inventors: Peter Ingo Borel, David John DiGiovanni, John Michael Fini, Poul Kristensen
  • Patent number: 8306379
    Abstract: A hollow core photonic crystal fiber (HCPCF) having a wavelength of operation, the HCPCF comprising: a core region having a first refractive index; a cladding region surrounding the core region and comprising a plurality of microcapillaries arranged in a transverse structure having a pitch, the pitch of the structure being at least five times larger than the wavelength of operation, the cladding region having a second refractive index higher than the first refractive index.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: November 6, 2012
    Assignee: GLOphotonics SAS
    Inventors: Abdel Fetah Benabid, Francois Yves Michel Denis Couny, Peter John Roberts
  • Patent number: 8295666
    Abstract: A coated optical fiber of the present invention comprises a glass fiber coated by at least two coating layers (a soft layer and a hard layer), wherein the glass surface of the glass fiber, where the at least two coating layers of the optical fiber are removed, has a peak intensity ratio of 0.6 or more in C3H7O+ (m/z 59) or C4H9O+ (m/z 73) with respect to Si+ (m/z 28) peak in cation analysis of TOF-SIMS. The optical fiber suppresses increase in its transmission loss even when it is exposed to a high-humidity environment or immersed in water.
    Type: Grant
    Filed: November 27, 2009
    Date of Patent: October 23, 2012
    Assignee: Furukawa Electric Co., Ltd.
    Inventors: Yasuo Nakajima, Hiroki Tanaka, Kouji Mochizuki
  • Patent number: 8206825
    Abstract: A coated or jacketed wire or cable, and components thereof are disclosed. The coating, jacket, and components, which comprise a polyolefin and a phenolic polymeric antioxidant, exhibit outstanding oxidative thermal stability (as indicated by the increase in the oxidative inductive time (OIT)), when compared to polyolefins containing traditional non-polymeric antioxidants. A greater improvement in the thermal oxidative stability is observed after the polyolefin mixtures have been aged in water-blocking filler(s).
    Type: Grant
    Filed: January 3, 2008
    Date of Patent: June 26, 2012
    Assignee: Equistar Chemicals, LP
    Inventors: Marvin R. Appel, Mick C. Hundley, Jeffrey S. Borke, Steven W. Horwatt
  • Patent number: 8145027
    Abstract: Disclosed is an improved, single-mode optical fiber possessing a novel coating system. When combined with a bend-insensitive glass fiber, the novel coating system according to the present invention yields an optical fiber having exceptionally low losses. The coating system features (i) a softer primary coating with excellent low-temperature characteristics to protect against microbending in any environment and in the toughest physical situations and, optionally, (ii) a colored secondary coating possessing enhanced color strength and vividness. The secondary coating provides improved ribbon characteristics for structures that are robust, yet easily entered (i.e., separated and stripped). The optional dual coating is specifically balanced for superior heat stripping in fiber ribbons, with virtually no residue left behind on the glass. This facilitates fast splicing and terminations.
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: March 27, 2012
    Assignee: Draka Comteq, B.V.
    Inventors: Bob J. Overton, Louis-Anne de Montmorillon, Simon Richard, Denis Molin, Marianne Bigot-Astruc, Pierre Sillard, David Boivin
  • Patent number: 8135252
    Abstract: A buffered optical fiber arrangement that includes a buffer tube in which is provided optical fibers and a texturized yarn coated with a water-swellable material. The filament diameter of the yarn used in the present invention may be between about 5 microns and about 100 microns, more preferably between about 10 and about 60 microns, still more preferably between about 20 and about 40 microns. The linear density, or denier in grams per 9000 meters, of the base yarn may be between about 100 and 1000, more preferably between about 200 and 600, or still more preferably between about 250 and 350. The degree of decrease in length (the “degree of texturizing”) between the perfectly straight filaments before texturizing and the texturized filament may be between 1 percent and 90 percent, more preferably between about 2 percent and 50 percent, or still more preferably between about 5 percent and 25 percent.
    Type: Grant
    Filed: July 20, 2006
    Date of Patent: March 13, 2012
    Assignee: Draka Comteq B.V.
    Inventors: Bob Overton, Wayne Cheatle
  • Patent number: 8107784
    Abstract: An optical fiber that is relatively insensitive to bend loss and alleviates the problem of catastrophic bend loss comprises a core region and a cladding region configured to support and guide the propagation of light in a fundamental transverse mode. The cladding region includes (i) an outer cladding region, (ii) an annular pedestal (or ring) region, (iii) an annular inner trench region, and (iv) an annular outer trench region. The pedestal region and the outer cladding region each have a refractive index relatively close to that of the outer cladding region. In order to suppress HOMs the pedestal region is configured to resonantly couple at least one (unwanted) transverse mode of the core region (other than the fundamental mode) to at least one transverse mode of the pedestal region. In a preferred embodiment, the fiber is configured so that, at a signal wavelength of approximately 1550 nm, its bend loss is no more than about 0.1 dB/turn at bend radius of 5 mm and is no more than about 0.
    Type: Grant
    Filed: May 27, 2009
    Date of Patent: January 31, 2012
    Assignee: OFS Fitel, LLC
    Inventors: Peter Ingo Borel, David John DiGiovanni, John Michael Fini, Poul Kristensen
  • Patent number: 8090232
    Abstract: The present disclosure relates to a telecommunications cable having a layer constructed to resist post-extrusion shrinkage. The layer includes a plurality of discrete shrinkage-reduction members embedded within a base material. The shrinkage-reduction members can be made of a liquid crystal polymer. The disclosure also relates to a method for manufacturing telecommunications cables having layers adapted to resist post-extrusion shrinkage.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: January 3, 2012
    Assignee: ADC Telecommunications, Inc.
    Inventor: Wayne M. Kachmar
  • Patent number: RE44288
    Abstract: According to one example of the invention an optical fiber comprises: (i) silica based, rare earth doped core having a first index of refraction n1; (ii) at least one silica based cladding surrounding the core and having a second index of refraction n2, such that n1>n2; wherein at least one of the core or cladding is doped with Al2O3, such that the ratio of max wt % to min wt % of Al2O3 concentration is less than 2:1.
    Type: Grant
    Filed: July 29, 2009
    Date of Patent: June 11, 2013
    Assignee: Corning Incorporated
    Inventors: Ronald L. Kimball, Robert A. Knowlton, Joseph E. McCarthy, Ji Wang, Donnell T. Walton, Luis A. Zenteno