Forming Lens Integral With Optical Fiber Patents (Class 65/387)
  • Patent number: 9429716
    Abstract: Mirror systems securing optical fibers to ferrules by thermally securing bonding agents within fiber optic connector housings are disclosed, along with related methods and assemblies. A fiber optic connector includes an optical fiber secured within a ferrule by a temperature-sensitive bonding agent to prevent attenuation-causing movement. The bonding agent is activated (e.g., cured) by heat provided by laser energy incident upon the ferrule, which is at least partially disposed within a fiber optic connector housing and which may be damaged by the laser energy. By shaping and disposing at least one mirror of a mirror system, the laser energy may be reflected to be incident upon the ferrule in a controllable intensity distribution. In this manner, the laser energy may be absorbed uniformly or substantially uniformly along a partial length of the ferrule extending into the housing to accelerate securing of the bonding agent while avoiding damage to the housing.
    Type: Grant
    Filed: December 7, 2013
    Date of Patent: August 30, 2016
    Assignee: Corning Cable Systems LLC
    Inventors: Robert Bruce Elkins, II, Andrey Kobyakov, Sergey Anatol'evich Kuchinsky, Aramais Zakharian
  • Patent number: 9304260
    Abstract: An optical fiber assembly includes an optical fiber with a bulbous portion at a first end of the optical fiber and an optical tip attachment surrounding a segment of the optical fiber proximate the bulbous portion. The optical tip attachment is configured to bend the segment of the optical fiber. The optical fiber tip attachment is configured to maintain an air gap between a cylindrical surface of the segment and an inner surface of the optical fiber tip attachment.
    Type: Grant
    Filed: July 1, 2013
    Date of Patent: April 5, 2016
    Assignee: LUMENIS LTD.
    Inventors: Arkady Khachaturov, Yacov Domankevitz, Assaf Preiss
  • Patent number: 9131847
    Abstract: Light scattering and absorption techniques for the detection of possible abnormal living tissue. Apparatus and methods for utilizing multiple blood content detection sensors and/or contact sensors for beneficially providing data to better guide an endoscope or colonoscope to locate abnormal tissue, tumors, or tissues that precede the development of such lesions or tumors.
    Type: Grant
    Filed: June 4, 2008
    Date of Patent: September 15, 2015
    Assignee: OLYMPUS CORPORATION
    Inventors: Kazuhiro Gono, Takeshi Suga
  • Patent number: 8857220
    Abstract: Methods of making a stub lens element and assemblies for coherence tomography (OCT) applications are disclosed. The method of making the stub lens element includes drawing a rod of optical material and processing the drawn rod to form a lens integrally connected to a stub section. The methods also include operably supporting an optical fiber and a stub lens element in a cooperative optical relationship to form a stub lens sub-assembly. The methods also include operably supporting the stub lens sub-assembly and a light-deflecting member in a cooperative optical relationship to form a probe optical assembly that has a folded optical path.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: October 14, 2014
    Assignee: Corning Incorporated
    Inventors: Venkata Adiseshaiah Bhagavatula, John Himmelreich
  • Publication number: 20140270639
    Abstract: The invention relates to an optical scattering element suitable for dispersing or scattering light transmitted by optical device by Mie scattering. The optical scattering element comprises a phase-separated or porous borosilicate glass having dispersed phase particles with a particle size of 200 to 500 nanometers or pores with a size of 200 to 500 nanometers, at a number density of 108 to 1012 mm?3. The optical scattering element can be prepared by subjecting a borosilicate glass to a controlled heat treatment to induce phase separation, and then optionally leaching out one of the phases with an acid leach. The optical scattering element can be, for example, attached to an end of an optical fiber or bundle of optical fibers. The invention also relates to a method of dispersing or scattering light by transmitting the light through the optical scattering element.
    Type: Application
    Filed: March 12, 2013
    Publication date: September 18, 2014
    Applicant: SCHOTT CORPORATION
    Inventors: William H. JAMES, III, Elizabeth CHASE, Mark J. DAVIS, Paula VULLO, Sally PUCILOWSKI, Eric Hector URRUTI
  • Publication number: 20130219969
    Abstract: Methods of making a stub lens element and assemblies for coherence tomography (OCT) applications are disclosed. The method of making the stub lens element includes drawing a rod of optical material and processing the drawn rod to form a lens integrally connected to a stub section. The methods also include operably supporting an optical fiber and a stub lens element in a cooperative optical relationship to form a stub lens sub-assembly. The methods also include operably supporting the stub lens sub-assembly and a light-deflecting member in a cooperative optical relationship to form a probe optical assembly that has a folded optical path.
    Type: Application
    Filed: February 23, 2012
    Publication date: August 29, 2013
    Inventors: Venkata Adiseshaiah Bhagavatula, John Himmelreich
  • Publication number: 20130194571
    Abstract: A remote sensor element for spectrographic measurements employs a monolithic assembly of one or two fiber optics to two optical elements separated by a supporting structure to allow the flow of gases or particulates therebetween. In a preferred embodiment, the sensor element components are fused ceramic to resist high temperatures and failure from large temperature changes.
    Type: Application
    Filed: February 1, 2012
    Publication date: August 1, 2013
    Inventor: Scott Thomas Sanders
  • Publication number: 20130160496
    Abstract: A method for producing rod lenses with an enveloping diameter of the rod lens face of up to 200 mm and an edge length of at least 800 mm. The method is characterized in that fabrication is performed from a cylindrical rod lens element made from synthetic quartz glass material configured as a fused silica ingot. This is performed using a flame hydrolysis method with a direct one stage deposition process of SIOx particles from a flame stream onto die that rotates and is moveable in a linear manner with respect to the flame stream.
    Type: Application
    Filed: December 20, 2012
    Publication date: June 27, 2013
    Applicant: J-PLASMA GMBH
    Inventor: j-plasma GmbH
  • Patent number: 8333018
    Abstract: The present invention discloses a composition for enhancing evaporation of a solution and a method thereof. A far-infrared ray is released by a far-infrared releasing substance in the composition so as to induce evaporation of the solution. The far-infrared releasing substance may be ceramic minerals and mainly comprises 80˜99.9 wt % of oxide minerals including 60˜95 wt % of the aluminum oxide. The present invention can enhance evaporation of the solution by a simple physical method. Hence, the present invention not only promotes the application of the products but also reduces the pollutants generated by a chemical reaction, thereby achieving the object of protecting the environment from the pollution.
    Type: Grant
    Filed: February 23, 2010
    Date of Patent: December 18, 2012
    Assignee: National Applied Research Laboratories
    Inventors: Yung-Sheng Lin, Ting-Kai Leung, Chien-Chung Chen, Jiann-Shiun Kao
  • Publication number: 20120147381
    Abstract: A system includes an optical source. The system further includes a reflective sensor remotely deployed from the optical source. The system further includes an optical processor. The system further includes a forward optical waveguide spanning the distance from, and transmitting light from, the optical source to the reflective sensor. The system further includes a return optical waveguide spanning the distance from, and transmitting light from, the reflective sensor to the optical processor. The forward optical waveguide follows substantially the same path as, but is completely separate from, the return optical waveguide.
    Type: Application
    Filed: August 20, 2009
    Publication date: June 14, 2012
    Inventors: Michel Joseph LeBlanc, Etienne Marcel Samson
  • Publication number: 20120063720
    Abstract: In some embodiments, an optical fiber assembly apparatus includes a signal fiber having a substantially constant outer diameter, a proximal portion, and a distal portion. The proximal portion has a waveguide structure configured to propagate an optical signal having a first mode field diameter and the distal portion has a waveguide structure configured to propagate the optical signal having the first mode field diameter at a proximal end of the distal portion and has an expanded waveguide structure configured to propagate the optical signal having a second mode field diameter at a distal end of the distal portion. The optical fiber assembly includes a lens fiber having a proximal end. The proximal end of the lens fiber is fused to the distal end of the distal portion of the signal fiber. The lens fiber is configured to propagate an optical signal through a nominally homogenous region.
    Type: Application
    Filed: September 8, 2011
    Publication date: March 15, 2012
    Applicant: VYTRAN, LLC
    Inventors: Baishi Wang, Mathieu Alexandre Antoina, Ying Qin
  • Patent number: 8066920
    Abstract: Optical qualities of a production lot of base material used in the fabrication of semi-finished lenses may be accurately determined by employing chipper plate samples produced from the base material in accordance with aspects of the present invention. In various implementations of the present invention, the chipper plates samples may be fabricated by subjecting base material to an extended cycle time and temperature profile using a mold having cavities of different thicknesses. The resulting chipper plates provide an improved indication of the color of semi-finished lenses molded from the production lot as well as an improved indication of resin stabilizer defects that may be utilized during a pelletizing process to control and enhance the quality of a production lot. Furthermore, the chipper plates may be provided by suppliers as samples of a production lot to enable customers to base purchasing decisions on a reliable and accurate measure of optical properties.
    Type: Grant
    Filed: June 11, 2009
    Date of Patent: November 29, 2011
    Assignee: Gentex Optics, Inc.
    Inventors: Daniel Gazaille, Paresh Kitchloo, Russell F. Weymouth, Jr.
  • Publication number: 20100157436
    Abstract: The manufacture of a GRIN lens using a sol-gel process includes forming a wet gel from an alcohol solution containing a silicon alkoxide, a dopant alkoxide, and an aluminum alkoxide, first, an alcohol solution containing the silicon alkoxide and the aluminum alkoxide as is prepared, and then the dopant alkoxide is mixed thereto.
    Type: Application
    Filed: November 29, 2007
    Publication date: June 24, 2010
    Inventors: Tomomi Ichinose, Toru Achiwa
  • Patent number: 7720332
    Abstract: Provided is an optical fiber illuminator used for recording and reading high density optical information according to a near field recording (NFR) scheme, a method of fabricating the optical fiber illuminator, and an optical recording head and recording apparatus having the optical fiber illuminator. The optical fiber illuminator includes: an optical fiber having a core upon which light is incident and a clad that surrounds the core, one end of the optical fiber having a mirror formed in an inclined manner; and a lens formed on an outer surface of the optical fiber for focusing light reflected by the mirror. The optical fiber illuminator has an improved optical arrangement for optical illumination and detection, it is easy to manufacture, its optical input is easy to control, and it can be readily provided in an array form.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: May 18, 2010
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kang Ho Park, Eun Kyoung Kim, Sung Q Lee
  • Patent number: 7672551
    Abstract: The present invention discloses an improved optical device having at least a first and second optical components. The optical device further includes a first extending tube securely attached to the first and second optical components as a first building block wherein the first and second optical components are aligned and position adjusted in the position-holding-and-fixing means and securely attached thereto by a room-temperature UV curable epoxy UV cured at room temperature. The optical device then further assembled using a step-by-step building block assembling process with more building blocks assembled by optical components similar to the first building block described above. In other preferred embodiment, the first and second optical components held in the extending tube having a pre-aligned dihedral angle between the first and second optical components.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: March 2, 2010
    Assignee: Oplink Communications, Inc.
    Inventor: Guijun Ji
  • Patent number: 7628040
    Abstract: In the jointing method of jointing an optical fiber F a softening point of which is higher than an optical lens L to the optical lens L, only the optical lens is softened by heating, and an end face as a joint portion of the optical fiber is pushed into a joint portion of the softened optical lens to thereby joint them.
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: December 8, 2009
    Assignees: Juki Corporation, Citizen Holdings Co., Ltd., Kabushiki Kaisha Ohara, Kabushiki Kaisha Topcon
    Inventor: Toshiaki Takahara
  • Publication number: 20090277228
    Abstract: A three-dimensional optical waveguide is formed by laminating planar substrates such as a plurality of lens substrates and, an isolator substrate and a wavelength division multiplexing filter, the optical substrates at least include a waveguide substrate having a waveguide and a reflecting surface. In the three-dimensional optical waveguide, the planar substrates are positioned by markers integrally formed on at least two of the planar substrates. Light directed into the waveguide is reflected by a reflecting surface and passes through the lens substrates and the isolator substrate.
    Type: Application
    Filed: July 15, 2009
    Publication date: November 12, 2009
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kaoru Ishida, Tsuguhiro Korenaga
  • Patent number: 7460748
    Abstract: A method provided for manufacturing a lensed tip optical fiber. The method includes providing an optically transparent cylindrical fiber; and etching a first end of the optically transparent cylindrical fiber to form a tip. The tip is heated which forms a lens surface at the heated tip.
    Type: Grant
    Filed: March 12, 2004
    Date of Patent: December 2, 2008
    Inventor: Yin S. Tang
  • Publication number: 20080245109
    Abstract: This invention provides an inexpensive and rapid method for fabricating a high-anisotropic-etch ratio, shaped glass structures using a novel photosensitive glass composition. Structures of the photosensitive glass may include micro-channels, micro-optics, microposts, or arrays of hollow micro-needles. Furthermore, such shaped glass structures can be used to form a negative mold for casting the shape in other materials.
    Type: Application
    Filed: March 28, 2008
    Publication date: October 9, 2008
    Applicant: LIFE BIOSCIENCE, INC.
    Inventors: Jeb H. Flemming, Colin T. Buckley, Carrie Schmidt
  • Publication number: 20080159694
    Abstract: An optical system (21) is disclosed, that includes a plurality of waveguides (10, 14) on a substrate (22) and a unitary collimating lens element (23) adjacent and optically coupled to the waveguides (10, 14) and on the same substrate (22). Methods for producing optical systems (21) and a plurality of optical signals are also disclosed.
    Type: Application
    Filed: December 27, 2007
    Publication date: July 3, 2008
    Applicant: RPO Pty Limited
    Inventor: Jonathan Payne
  • Publication number: 20080131052
    Abstract: An optical fiber coupling part that reduces the difficulty in adjusting cores, minimizes coupling loss, and prevents optical characteristics from deteriorating. An optical fiber is fused to one end of a GRIN lens which includes a quartz glass containing one or more refractive index regulating substances selected from Sb2O3, Ta2O5, TiO2 or ZrO2. Optical characteristics are not deteriorated because an adhesive is not used, and self-alignment effects facilitate adjustment of the cores of the GRIN lens and the optical fiber. Furthermore, coupling loss can be minimized by setting a refractive index distribution constant g of the GRIN lens within an appropriate range.
    Type: Application
    Filed: February 1, 2005
    Publication date: June 5, 2008
    Inventors: Hiroyoshi Matsumura, Taro Suzuki, Toru Achiwa
  • Patent number: 7357005
    Abstract: A fiber optic collimator system, a fiber optic collimator array, and a fiber optic collimator array system, which can reduce difficulty in an alignment process, minimize a coupling loss, and prevent the optical characteristics from deteriorating. An optical fiber is fused to one end of a GRIN lens made of quartz glass containing one or more selected from Sb2O3, Ta2O5, TiO2 and ZrO2 as a refractive index regulating substance, to form an optical fiber with a GRIN lens. Since an adhesive is not used, the core alignment of the GRIN lens and the optical fiber can be facilitated by a self alignment effect without deteriorating the optical characteristics. Moreover, the coupling loss is remarkably reduced by appropriately setting a refractive index distribution constant g of the GRIN lens.
    Type: Grant
    Filed: April 5, 2005
    Date of Patent: April 15, 2008
    Assignee: Toyo Glass Co., Ltd.
    Inventors: Hiroyoshi Matsumura, Taro Suzuki, Toru Achiwa
  • Publication number: 20080039309
    Abstract: The lead-free optical glass can be used in the fields of imaging, sensor technology, microscopy, medical technology, digital projection, photolithography, laser technology, wafer/chip technology, as well as of telecommunications, optical communication engineering and optics/lighting in the automotive sector. It has a refractive index nd of 1.82?nd?2.00 and/or an Abbe number vd of 18?vd?28 with good chemical stability, excellent crystallization stability and the following composition, in wt. based on oxide content, of: P2O5 12-35 Nb2O5 30-50 Bi2O3 ?2-13 GeO2 0.1-7?? Li2O ?6 Na2O ?6 K2O ?6 Cs2O ?6 MgO ?6 CaO ?6 SrO ?6 BaO ???7-<17 ZnO ?6 TiO2 ?7 ZrO2 ?7 WO3 ?2-14 F ??6.
    Type: Application
    Filed: August 8, 2007
    Publication date: February 14, 2008
    Inventors: Silke Wolff, Simone Monika Ritter, Ute Woelfel
  • Patent number: 7149395
    Abstract: The present invention provides a light-enhancing component and a fabrication method thereof by using the focused-ion-beam. In the present invention, the surface plasmon polariton structure is coated on the surface of the optical fiber so as to form the light-enhancing component. When the light passes through the optical fiber, the luminous flux transmitted through the aperture on the surface plasmon polariton is enhanced, and the light beam smaller than the diffraction limitation can be transmitted to the far-field, i.e. the nano-optic sword is formed. The light-enhancing component of the present invention can be used for the optical data storage, the optical microscopy, the biomedical detections and the lithography to perform the extra optical resolutions beyond the diffraction limitation.
    Type: Grant
    Filed: August 9, 2005
    Date of Patent: December 12, 2006
    Assignees: Instrument Technology Research Center, National Applied Research Laboratories
    Inventors: Jyh-Shin Chen, Tong-Long Fu, Shao-Chang Cheng, Yu-Hsuan Lin, Yi-Chiuen Hu, Hui-Hsiung Lin, Hsiao-Yu Chou
  • Patent number: 7142741
    Abstract: A cutting method and apparatus are provided to cut a portion of an optical fibre or waveguide with a laser beam. The proposed cutting action takes advantage of the sharp cutting edge of a laser beam generated so as to have a predetermined asymmetric intensity distribution. In operation, a prescribed amount of the beam distribution is impinged on the fibre or waveguide portion and causes the portion to ablate or vaporise so as to effect a cut at the portion in dependence upon the impingement. No translation of the laser beam across the fibre or waveguide is effected during cutting. The proposed cutting action bears definite advantages over conventional cutting techniques and finds utility for many optical fibre or waveguide applications. For example, the proposed cutting action can produce a substantially flat optical fibre or waveguide surface or a lens of enhanced quality at the end of the fibre or waveguide portion.
    Type: Grant
    Filed: October 25, 2001
    Date of Patent: November 28, 2006
    Assignee: Iruvis Limited
    Inventor: Michael Osborne
  • Patent number: 7062135
    Abstract: The present invention provides methods for forming convex and concave elements on the ends of supporting members. A convex element may be formed by forming a droplet on the end of the supporting member, then curing the droplet. The size of the droplet may be controlled using evaporation of a solvent from the droplet. In another aspect of the invention, an optical element may be formed by forming a droplet on the end of the supporting member, contacting the droplet with a mold, and curing the droplet, thereby forming an element with a curvature opposite that of the mold. When the supporting member is an optical fiber, the elements formed by the methods of the present invention are useful as lenses and mirrors in micro-optic devices.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: June 13, 2006
    Assignee: Corning Incorporated
    Inventors: Stephen J. Caracci, Alain R. E. Carre, Adam J. Fusco
  • Patent number: 6944371
    Abstract: To provide a lens-integrated optical fiber with low cost and well controlled optical properties, and production method thereof a lens-integrated optical fiber includes an optical fiber and a lens mounted on an end face of the optical fiber.
    Type: Grant
    Filed: January 22, 2004
    Date of Patent: September 13, 2005
    Assignee: Seiko Epson Corporation
    Inventor: Tsuyoshi Kaneko
  • Patent number: 6820445
    Abstract: The invention features a method for attaching a surface of a first optical element to a surface of a second optical element. The method includes: providing a bonding glass on at least one of the surfaces, wherein the bonding glass is selected to match the refractive indices of the first and second optical elements at the surfaces over a first range of wavelengths and absorb optical energy to a greater extent than that of the optical elements over a second range of wavelengths different from the first range of wavelengths; positioning the surfaces proximate one another; directing optical energy to the bonding glass through at least one of the optical elements at a wavelength in the second range of wavelengths, wherein the optical energy is sufficient to melt the bonding glass without deforming the optical elements; and allowing the melted bonding glass to solidify and fuse the proximately positioned surfaces.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: November 23, 2004
    Assignee: Zygo Corporation
    Inventor: Edward J. Gratrix
  • Patent number: 6802190
    Abstract: A method for fabricating a GRIN fiber includes forming a tube of silica-glass having a tubular core and a concentric tubular cladding adjacent and external to the tubular core. The core has a dopant density with a radially graded profile. The method includes partially collapsing the tube by applying heat thereto. The partially collapsed tube has a central channel. The method includes passing a glass etchant through the central canal to remove an internal layer of silica glass, and then, collapsing the etched tube to a rod-like preform.
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: October 12, 2004
    Assignee: Lucent Technologies Inc.
    Inventors: William Alfred Reed, Mark J Schnitzer
  • Patent number: 6782011
    Abstract: A lensed polarization maintaining fiber having a lens on an end thereof has a core, two stress-applied regions disposed on both sides of the core, respectively, and a clad containing the core and stress-applied regions. The lens has at least an inclined face, the inclined face including an edge. Each of the stress-applied regions is exposed on the inclined face except the edge.
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: August 24, 2004
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Teruo Kusano, Toshio Mugishima, Jun Miyokawa
  • Patent number: 6738544
    Abstract: A thermally-shaped optical fiber and a method for forming the same so as to minimize the presence of optical artifacts in the optical fiber that contributes to insertion loss.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: May 18, 2004
    Assignee: Megladon Manufacturing Group
    Inventors: John M. Culbert, Robert Mays, Jr.
  • Patent number: 6674940
    Abstract: An optical fiber assembly has a microlens joined to the face of an optical fiber. The microlens is made from a material which, when liquid, adheres to the face. The microlens can have a focal point which defines an optical path between the surface of the microlens and the optical fiber's core. This assembly can be formed by applying liquid such a pre-dispensed droplets of liquid to the optical fiber so that the liquid adheres to the optical fiber as a droplet at the face, and solidifying the droplet to form the microlens. The droplet's shape can be altered as it solidifies.
    Type: Grant
    Filed: October 29, 2001
    Date of Patent: January 6, 2004
    Assignee: Lucent Technologies Inc.
    Inventor: Timofei N. Kroupenkine
  • Publication number: 20030202762
    Abstract: A tapered lensed fiber includes a tapered multimode fiber having a gradient-index core and an optical fiber attached to the tapered multimode fiber. A method for forming a tapered lensed fiber includes attaching an optical fiber to a multimode fiber having a gradient-index core, applying heat to a surface of the multimode fiber, and pulling the multimode fiber into a taper. The method also allows for forming a tapered polarization-maintaining fiber while preserving stress rods and polarization isolation properties of the polarization-maintaining fiber.
    Type: Application
    Filed: May 16, 2003
    Publication date: October 30, 2003
    Inventors: Ljerka Ukrainczyk, Debra L. Vastag
  • Publication number: 20030138201
    Abstract: Methods, including chemical mechanical polishing methods, for creating a focusing surface on the exposed end of one or more single mode fiber cores which focusing surface is self-aligned to the fiber core axis.
    Type: Application
    Filed: July 10, 2002
    Publication date: July 24, 2003
    Applicant: Cabot Microelectronics Corp.
    Inventor: David G. Mikolas
  • Publication number: 20030074924
    Abstract: Method and Apparatus for Forming a Lens on an Optical Fiber includes a fiber rotator assembly that receives and axially rotates an optical fiber. The optical fiber is positioned through a fiber support assembly that includes an air bearing for the near frictionless rotation of the fiber. A fiber forming assembly is positioned adjacent the end of the optical fiber and includes an abrasive disc mounted to the shaft of an abrasive disc motor. The fiber forming assembly is advanced toward the rotating optical fiber for the rotating abrasive disc to contact and remove a portion of the tip of the fiber forming a cone having a predetermined cone angle. A fiber profiling tool having a flexible abrasive flap is advanced to contact the cone-shaped tip of the rotating fiber to remove a portion of the cone to form a lens on the end of the fiber.
    Type: Application
    Filed: May 22, 2002
    Publication date: April 24, 2003
    Inventors: Charles David Melville, Richard S. Johnston
  • Patent number: 6549704
    Abstract: A method of making a microlensed fiber by splicing a doped silica rod to an optical fiber and shaping the end of the doped silica rod into a plano-convex refracting lens. The doped silica rod has a lower melting point and annealing point than undoped silica, and therefor less power is required to manufacture the microlensed fiber. This decreases wear to the heating elements of the manufacturing equipment and therefor increases the number of microlensed fibers that can be manufactured between cycles. A further aspect of the present invention is a microlensed fiber made by the above process.
    Type: Grant
    Filed: June 26, 2001
    Date of Patent: April 15, 2003
    Assignee: Corning Incorporated
    Inventor: Ljerka Ukrainczyk
  • Patent number: 6341503
    Abstract: The present invention relates to a method for terminating the end of an optical fiber. In particular the present invention relates to a method for forming a low reflectance termination on an end of an optical fiber. The method including the step of tensioning the optical fiber between two spaced apart points thereon. The method further including the step of moving a ball termination torch from a given location in a given direction with respect to the fiber such that a potion of the flame therefrom intercepts the fiber and severs the fiber into two pieces each having a tapered end. The method further includes the steps of retracting at least one of the tapered ends a predetermined distance in a direction away from the other of the tapered ends and continuing to move the torch such that the flame heats the at least one of the tapered ends to cause it to become shortened.
    Type: Grant
    Filed: March 14, 2000
    Date of Patent: January 29, 2002
    Assignee: Corning Incorporated
    Inventors: William James Miller, Mark Leon Morrell
  • Patent number: 6272886
    Abstract: The present invention is a process for manufacturing an optical fiber Bragg grating, which in a preferred embodiment includes the steps of: (a) removing at least a portion of a removable coating on an optical fiber element in at least one predetermined section to sufficiently expose the optical fiber in the section for a subsequent treatment by a source of optical radiation; (b) fixing the at least one section with respect to the source of optical radiation; (c) directing optical radiation from the source into the optical fiber to produce at least one Bragg grating in the at least one section; and (d) covering the at least one section. The present invention also extends to an apparatus for carrying out the process steps described above, which includes means for coating removal, means for fiber immobilization, means for writing a Bragg grating, and means for packaging.
    Type: Grant
    Filed: October 23, 1996
    Date of Patent: August 14, 2001
    Assignee: 3M Innovative Properties Company
    Inventors: James C. Novack, Bryon J. Cronk, Bruce A. Rabine, Gary A. Ball, Harmeet Singh, Paul E. Sanders
  • Patent number: 6128926
    Abstract: A non-phase separable glass material for fabricating a GRIN lens comprises 5-20 mole % boron oxide and ratio R of network modifiers in mole % to the network former boron oxide in mole % is in the range of about 1-1.5. The melted preform of such glass material is extruded through an opening to form a glass rod where the extrusion process eliminates bubbles that may be present in the preform. Neodymium oxide may be added in the frit material for forming the preform to reduce friction forces in the extrusion process and reduces the stress in the glass rod. Centerless grinding may be performed to control the diameter and roughness of the surface of the rod to control the diffusion parameters during the subsequent ion-exchange.
    Type: Grant
    Filed: March 15, 1999
    Date of Patent: October 10, 2000
    Assignee: Dicon Fiberoptics, Inc.
    Inventors: Udayan Senapati, Ho-Shang Lee
  • Patent number: 5845024
    Abstract: An optical fiber with lens of a simple construction capable of taking in a flat beam of light efficiently and improving the optical coupling efficiency between an LD and a fiber, and a method of manufacturing the same. Diagonal cut surfaces are provided on both sides of the center of a core at an end of an optical fiber which is opposed to a light source or the outgoing light, whereby a wedge-like end portion is formed, a semicylindrical lens formed to a desired radius of curvature being thus provided at this end of the optical fiber. Portions of a desired radius of curvature which extend in two orthogonal directions are further provided at this end of the optical fiber.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: December 1, 1998
    Assignee: Namiki Precision Jewel Co., Ltd.
    Inventors: Takuji Tsushima, Michitomo Shibutani
  • Patent number: 5772720
    Abstract: The end face (32) of the optical fiber (24) of a fiber optical terminal (10) is finished by installing the fiber in a terminal ferrule (18), cleaving an end of the fiber close to the end face (54) of the ferrule, and heating the cleaved fiber end face so as to soften its end face and cause it to assume a smooth, rounded configuration. The heating is accomplished, for a glass fiber, by application of the beam of a carbon dioxide laser (60) to the optical fiber end face. The heat softened end face assumes a smooth, rounded configuration that minimizes back reflection. A system including a laser (105), shutter (102), beam expander (108) and parabolic mirror (110) heats the fiber end face that is positioned at the parabola faces by a three axis manipulator (156,158) and holder (152). Orthogonal viewing systems (126, 142) enable visual monitoring of the process.
    Type: Grant
    Filed: March 17, 1997
    Date of Patent: June 30, 1998
    Assignee: Raytheon Company
    Inventors: Laurie K. Taira-Griffin, John S. Szalay, Michael R. Vince, Joseph A. Wysocki, Stephen W. McCahon
  • Patent number: 5755850
    Abstract: A new optical fiber and method of manufacturing the same developed for use with surgical laser systems. The fiber core utilizes an ultra-low expansion (ULE) material. The preferred ULE fiber consists of silicon dioxide core doped with titanium dioxide which is cladded and jacketed for chemical and abrasion resistance. The resulting fiber is stable against degradation due to thermal expansion.
    Type: Grant
    Filed: March 10, 1994
    Date of Patent: May 26, 1998
    Assignee: Iowa State University Research Foundation
    Inventors: Steve W. Martin, Gerald J. Shirk
  • Patent number: 5751871
    Abstract: A method for efficiently coupling beams from semiconductor lasers into optical fibers is presented which provides optical fibers with a modified end surface for efficient coupling. The method comprises a combination of shaping of the fiber end face and of axially varying the refractive index of the fiber end face material as a function of the distance from fiber end face surface. One preferred embodiment employs an axial gradient-index lens (AGRIN lens) fabricated directly on the fiber end face to improve coupling a laser beam into the fiber. The method can also be used in other applications where optical fibers having spherical or more complicated surfaces of their end faces need to be fabricated.
    Type: Grant
    Filed: January 3, 1997
    Date of Patent: May 12, 1998
    Assignee: Ceram Optec Industries, Inc.
    Inventors: Sergej G. Krivoshlykov, Bolesh J. Skutnik
  • Patent number: 5664040
    Abstract: There is provided an assembly having a light guiding medium sealed to a her. Preferably the holder is a metal shell and a light guiding medium is an optical fiber of glass or sapphire whisker. The assembly includes a sealing medium which sealingly engages the metal holder to the fiber. In the formation of the assembly, the seal is essentially hermetic having a capability of minimizing leakage having a helium leak rate of less than 1.times.10.sup.-8 cubic centimeters per second and high strength having a capability of withstanding pressures of 100,000 psi or greater. The features of the assembly are obtained by a specific preparation method and by selection of specific starting materials. The fiber is selected to have a sufficiently high coefficient of thermal expansion which minimizes strains in the component during fabrication, as a result of fabrication, and during use.
    Type: Grant
    Filed: August 29, 1995
    Date of Patent: September 2, 1997
    Assignee: The United States of America as represented by the Department of Energy
    Inventors: Daniel P. Kramer, Thomas M. Beckman
  • Patent number: 5551968
    Abstract: A low-cost, high performance 1.times.N fiber optic coupler where N>16 is presented. The coupler has a GRIN lens having an first optic fiber aligned with the optical axis of the lens at one end of the lens. The first optic fiber ends in a microlens. At the other end of the GRIN lens a bundle of tapered second optic fibers is centered on the optical axis of the lens. The microlens is formed by fusing two fibers together, stretching the fused region, jerking the fibers apart and then heating a fiber end to form the lens.
    Type: Grant
    Filed: August 23, 1994
    Date of Patent: September 3, 1996
    Inventor: Jing-Jong Pan
  • Patent number: 5500031
    Abstract: In accordance with the invention, the index of refraction of a glassy material is increased by treating the material with hydrogen and applying heat. Specifically, the glass is exposed to hydrogen or deuterium at pressure in the range 14-11,000 p.s.i. and a temperature in the range 21.degree.-150.degree. C. for a time sufficient for the hydrogen to diffuse into the glass. The glass is then subjected to heat in excess of about 500.degree. C., as by application of a flame or infrared radiation. The duration of heating can be less than a second. The result is a substantial and long-lived increase in the normalized refractive index. For example, flame heating of H.sub.2 loaded commercial GeO.sub.2 doped optical fibers (AT&T Accutether single mode fiber) has produced normalized index changes .increment.n/n of 4.times.10.sup.-3. This process can be used to make and adjust a variety of optical waveguide devices.
    Type: Grant
    Filed: December 14, 1994
    Date of Patent: March 19, 1996
    Assignee: AT&T Corp.
    Inventors: Robert M. Atkins, Paul J. Lemaire, Victor Mizrahi, Kenneth L. Walker
  • Patent number: 5457759
    Abstract: An optical system comprising a monomode main optical fiber coupled to a phototransducer, by means of an assembly between the monomode optical fiber and the phototransducer, which assembly comprises, in succession: a piece of graded index multimode fiber, a piece of step index multimode fiber, and a microlens.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: October 10, 1995
    Assignee: France Telecom
    Inventors: Ndiata Kalonji, Jack Semo
  • Patent number: 5402510
    Abstract: The present invention relates to a method of preparing an optical fiber for optimum coupling with a phototransducer, comprising the following steps: cleaving an end surface on an optical fiber; and depositing a succession of convex lenses on said cleaved surface over the core of the fiber, the lenses being in axial alignment and of decreasing radii of curvature on going away from the fiber. The present invention also provides a system obtained by implementing the method.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: March 28, 1995
    Assignee: France Telecom
    Inventors: Ndiata Kalonji, Jack Semo