Where The Second Or Further Layer Is A Coating Patents (Class 385/128)
  • Patent number: 7280730
    Abstract: Various types of holey fiber provide optical propagation. In various embodiments, for example, a large core holey fiber comprises a cladding region formed by large holes arranged in few layers. The number of layers or rows of holes about the large core can be used to coarse tune the leakage losses of the fundamental and higher modes of a signal, thereby allowing the non-fundamental modes to be substantially eliminated by leakage over a given length of fiber. Fine tuning of leakage losses can be performed by adjusting the hole dimension and/or the hole spacing to yield a desired operation with a desired leakage loss of the fundamental mode. Resulting holey fibers have a large hole dimension and spacing, and thus a large core, when compared to traditional fibers and conventional fibers that propagate a single mode. Other loss mechanisms, such as bend loss and modal spacing can be utilized for selected modes of operation of holey fibers. Other embodiments are also provided.
    Type: Grant
    Filed: May 13, 2004
    Date of Patent: October 9, 2007
    Assignee: Imra America, Inc.
    Inventors: Liang Dong, Donald J. Harter, William Wong
  • Patent number: 7277605
    Abstract: A Fabry-Perot cavity is formed by a partially or wholly reflective surface on the free end of an integrated elongate channel or an integrated bounding wall of a chip of a wafer and a partially reflective surface on the end of the optical fiber. Such a constructed device can be utilized to detect one or more physical parameters, such as, for example, strain, through the optical fiber using an optical detection system to provide measuring accuracies of less than aboutb0.1%.
    Type: Grant
    Filed: May 18, 2005
    Date of Patent: October 2, 2007
    Assignee: The Regents of the University of California
    Inventors: Michael D. Pocha, Steve P. Swierkowski, Billy E. Wood
  • Patent number: 7274846
    Abstract: A fiber optic ribbon having a plurality of optical fibers held together by a matrix material is disclosed. The matrix material has a first end with a first shape and a second end with a second shape, where the first shape is different than the second shape. In one embodiment, the first end has a concave end portion and the second end has a convex end portion. The fiber optic ribbon is advantageous as a subunit of a larger ribbon since the first end of a first subunit can interlock with a second end of a second subunit, thereby providing a robust structure. Moreover, the distance between optical fibers of adjacent subunits is reduced so the fiber optic ribbon may allow mass fusion splicing of same using standard splice chucks.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: September 25, 2007
    Assignee: Corning Cable Systems, LLC.
    Inventors: Mark T. Paap, Michael J. Gimblet
  • Patent number: 7272289
    Abstract: An optical fiber having both low macrobend loss and low microbend loss. The fiber has a MAC number less than 7.0 and a zero dispersion wavelength less than 1450 nm. The optical fiber advantageously comprises a primary coating and a secondary coating. The primary coating has a Young's modulus of less than 1.0 MPa and a glass transition temperature of less than ?25° C. The secondary coating surrounds the primary coating, and the secondary coating has a Young's modulus of greater than 1200 MPa. The macrobend loss as measured by a 20 mm diameter bend test at 1550 nm is not more than 5.0 dB/m. Optical fiber ribbon and optical fiber cable that include the optical fiber is also disclosed.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: September 18, 2007
    Assignee: Corning Incorporated
    Inventors: Scott R. Bickham, Snigdharaj K. Mishra, Steven S. Rosenblum
  • Patent number: 7266276
    Abstract: An optical fiber includes a glass fiber having a glass core and a cladding that contains voids that are spaced apart from the core, in contact with the core, or form a substantial portion of the core. The voids act as trapping sites for ingressing molecules from the surrounding environment, thereby reducing the effect of such molecules on the fiber's light-transmission properties.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: September 4, 2007
    Assignee: Verrilon, Inc.
    Inventors: Imtiaz Majid, Abdel Soufiane
  • Patent number: 7263267
    Abstract: A higher order mode dispersion compensating fiber includes an optical fiber and a first loss layer which is provided within the fiber and which attenuates a lower order mode propagating through the optical fiber while not attenuating a higher order mode which is higher than the lower order mode. A dispersion compensating fiber mode converter for a higher order fiber includes a single mode fiber; a higher order mode dispersion compensating fiber; and a fused and extended portion which has been formed by fusing and extending the single mode fiber and the higher order mode fiber. The fused and extended portion converts between the LP01 mode of the single mode fiber and the LP02 mode of the higher order mode dispersion compensating fiber.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: August 28, 2007
    Assignee: Fujikura Ltd.
    Inventors: Ning Guan, Kazuhiko Aikawa, Masashi Ikeda, Kuniharu Himeno, Koichi Harada
  • Patent number: 7257303
    Abstract: Disclosed herein is a coated optical fiber comprising: a siliceous optical fiber including a core inside a cladding; and a cured coating comprising: a thermally cured polyorganosilsesquioxane; and an oxide powder dispersed in said cured polyorganosilsesquioxane, wherein said oxide powder has a refractive index from about 1.2 to about 2.7 and includes a plurality of particles having a particle size less than about 100 nanometers, said cured coating having adhesion to said siliceous optical fiber and further having transparency to ultraviolet radiation. Also disclosed herein is a fiber optic device comprising the optical fiber.
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: August 14, 2007
    Assignee: 3M Innovative Properties Company
    Inventors: Christopher B. Walker, Jr., D. Scott Thompson, Dora M. Paolucci, John T. Brady
  • Patent number: 7257299
    Abstract: An optical fiber ribbon includes a plurality of optical fibers encapsulated within a matrix material, where the optical fiber coating(s) and the matrix material(s), and optionally any ink layers thereon, are characterized by compatible chemical and/or physical properties, whereby the fiber coating and matrix and any ink layers therebetween can be reliably stripped from the optical fibers to afford a suitable strip cleanliness. Novel ink formulations that can be used in the making of such fiber optic ribbons, methods of making such ribbons, and their use are also described.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: August 14, 2007
    Assignee: Corning Incorporated
    Inventors: Ching-Kee Chien, Michelle Dawn Fabian, Edward John Fewkes, Michael James Winningham
  • Patent number: 7257301
    Abstract: An optical fiber resistant to hydrogen-induced attenuation losses at both relatively low and relatively high temperatures includes a substantially pure silica core and a hydrogen retarding layer. The hydrogen retarding coating may be made of carbon, metal, or silicon nitride. The fiber may also include a cladding layer, a second silica layer, and a protective outer sheath.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: August 14, 2007
    Assignee: Baker Hughes Incorporated
    Inventors: Daniel Homa, John W. Guarniere, Paul Zerwekh, Brooks Childers, Justin Crusse
  • Patent number: 7251401
    Abstract: An optical fiber and methods of processing and manufacturing an optical fiber comprising a core, a cladding and a coating covering a segment of the cladding proximate to an end of the optical fiber are presented where patterned apertures are provided in the coating such that a portion of light propagating in the cladding escapes through the patterned apertures of the coating. The patterned apertures allow non-confined light to escape from the cladding in the coating region to provide reduced absorption of the non-confined light by the coating.
    Type: Grant
    Filed: September 16, 2005
    Date of Patent: July 31, 2007
    Assignee: Matshsita Electric Industrial Co., Ltd.
    Inventor: Rajminder Singh
  • Patent number: 7248399
    Abstract: An optical fiber for Raman amplification amplifies a signal light with a pumping light. A chromatic dispersion at a wavelength of 1,550 nm is in a range between ?70 ps/nm/km and ?30 ps/nm/km. Raman gain efficiency with a pumping light of 1,450 nm is equal to or more than 5 (W×km)?1. Nonlinear coefficient at the wavelength of 1,550 nm is equal to or less than 5.0×10?9 W?1. Zero-dispersion wavelength is neither at a wavelength of the signal light nor at a wavelength of the pumping light. Cut-off wavelength is equal to or less than the wavelength of the pumping light.
    Type: Grant
    Filed: January 6, 2006
    Date of Patent: July 24, 2007
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Yuki Taniguchi, Yoshihiro Emori, Ryuichi Sugizaki, Atsushi Oguri, Takeshi Yagi
  • Patent number: 7242836
    Abstract: There is provided a method of processing an optical fiber having a core and a clad. The optical fiber has a first facet and a second facet. The method includes fixing the optical fiber in a state in which at least a portion thereof is bent in a predetermined curvature radius, applying a resist to a region on the first facet at least including an entirety of the core, irradiating the second facet with light of a predetermined wavelength so that only the resist applied to the core in the first facet is exposed to the light through an inside of the optical fiber, developing the resist, and forming a level gap at a boundary between the core and the clad in the first facet utilizing the resist remaining after the irradiating and the developing.
    Type: Grant
    Filed: August 29, 2005
    Date of Patent: July 10, 2007
    Assignee: PENTAX Corporation
    Inventors: Masahiro Fushimi, Mitsunori Iima
  • Patent number: 7239785
    Abstract: A method of minimizing localized heating of, or minimizing signal losses across a source of loss in, an optical fiber used in transmission of a high power optical signal at an operating wavelength. These methods include the steps of: providing an optical fiber which comprises either (i) a coating characterized by an absorbance of less than about 4.5 dB/cm at the operating wavelength or (ii) a refractive index lower than the refractive index of a cladding layer of the optical fiber by more than about 3×10?3 at the operating wavelength, or (iii) both (i) and (ii); and transmitting a optical signal having a power greater than about 250 mW through the optical fiber, wherein the coating, cladding layer, or combination thereof are selected to minimize localized heating of the optical fiber or to result in a signal loss across a source of loss that is less than about 250 mW at the operating wavelength.
    Type: Grant
    Filed: December 30, 2004
    Date of Patent: July 3, 2007
    Assignee: Corning Incorporated
    Inventors: Steven E. DeMartino, Michael E. DeRosa, Gregory S. Glaesemann, Stephan L. Logunov, Ulrich W. H. Neukirch, Michael J. Winningham
  • Patent number: 7233728
    Abstract: A dispersion-compensated optical fiber which does not cause an increase in a loss if it is wound in a small reel and has a stable temperature characteristics is provided, wherein, in a wavelength range from. A dispersion-compensated optical fiber is formed such that, in at least a wavelength between 1.53 to 1.63 ?m, a bending loss of with a 20 mm bending diameter is 5 dB/m or lower, a wavelength dispersion is ?120 ps/nm/km or lower, a cut-off wavelength under a usage condition is 1.53 ?m or lower, an outer diameter of the cladding is 80 to 100 ?m, an outer diameter of a coating is 160 to 200 ?m, and a viscosity of a surface of a coating resin is 10 gf/mm or lower. It is set such that b/a is 1.5 to 3.5, c/b is 1.2 to 2.0, a radius of a core is 4 to 8 ?m, ?1 is +1.6% to +2.6%, ?2 is ?0.30% to ?1.4%, and ?3 is ?0.30% to +1.0%. Young's modulus of a first coating layer is 0.15 kgf/mm2 or lower and its thickness is 20 to 30 ?m.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: June 19, 2007
    Assignee: Fujikura Ltd.
    Inventors: Kazuhiko Aikawa, Shogo Shimizu, Ryuji Suzuki, Masakazu Nakayama, Kuniharu Himeno
  • Patent number: 7231121
    Abstract: An optical fiber having reduced residual stress discontinuity is disclosed. The optical fiber includes a core which is an optical transmission medium and a clad for surrounding the core. The residual stress discontinuity at an interface between the core and the clad is 20.0 MPa or less, which is represented by an absolute value of a difference between a minimum axial stress at (r/a)=0.8-1.1 and a maximum axial stress at (r/a)=1.0-1.2, wherein a is the radius of the core and r is a radius measured from the center of the core.
    Type: Grant
    Filed: August 17, 2004
    Date of Patent: June 12, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Se Ho Park, Jin-Haing Kim
  • Patent number: 7221842
    Abstract: The present invention provides optical fiber coating systems and coated optical fibers. According to one embodiment of the invention, a coated optical fiber includes an optical fiber having a core and a cladding; and a primary coating encapsulating the optical fiber, the primary coating having a Young's modulus of about 5 MPa or less, the primary coating being the cured reaction product of a primary curable composition having a gel time less than about 1.4 seconds at a UV intensity of 3.4 mW/cm2.
    Type: Grant
    Filed: March 2, 2006
    Date of Patent: May 22, 2007
    Assignee: Corning Incorporated
    Inventors: Linda S. Baker, Kevin R. McCarthy, Michael J. Winningham, Lung-Ming Wu
  • Patent number: 7221841
    Abstract: An optical fiber comprising a flame retardant UV light-curable tight-buffer coating coated onto the fiber, wherein said tight-buffer coating is substantially halogen-free, and has a limiting oxygen index of at least about 22%, and wherein said tight-buffer coating is removable from said fiber with a strip-force of less than about 1800 grams when the fiber is upjacketed with said coating at a line speed of at least 300 m/min.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: May 22, 2007
    Assignee: DSM IP Assets B.V.
    Inventors: David M. Chase, Kenneth Dake, Kelly A. Hawkinson, Jack Kelly, Edward J. Murphy
  • Patent number: 7218820
    Abstract: A fiber optic conduit for use in a hostile environment includes a hydrogen barrier shell that is disposed outwardly from an inner axial tube. The hydrogen barrier shell comprises a material that is capable of reducing hydrogen permeation through the fiber optic conduit and a thickness of at least approximately one-thousandth of an inch. The inner axial tube is operable to receive one or more optical fibers. The conduit further includes an outer axial tube that is disposed outwardly from the hydrogen barrier shell and is operable to form a hydrostatic pressure boundary for the fiber optic conduit.
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: May 15, 2007
    Assignee: WellDynamics, Inc.
    Inventor: John L. Maida, Jr.
  • Patent number: 7214943
    Abstract: A radiation or neutron detector wherein lateral side light detecting optical fibers prepared from clear optical fibers that are scraped on a lateral side to permit side incidence of fluorescence are used to detect the fluorescence from a phosphor or a scintillator such that the background to gamma-rays is reduced. If desired, the optical fibers may be bent at 90 degrees and guided to a photomultiplier tube in order to reduce the size of the detector. Fabrication and maintenance of the detector can be facilitated by adopting such a design that a detecting block comprising a detection medium and lateral side light detecting optical fibers is separated from a readout block comprising clear optical fibers.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: May 8, 2007
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Masaki Katagiri, Masahito Matsubayashi
  • Patent number: 7215860
    Abstract: The present invention provides an apparatus comprising a passive optical transmission fiber. The passive optical transmission fiber comprises a passive glass fiber core, a glass optical inner cladding surrounding the core and a glass optical outer cladding surrounding the inner cladding. The inner cladding has a lower index of refraction than the passive glass fiber core and the outer cladding has a lower index of refraction than the inner cladding. The passive optical transmission fiber also comprises a second optical segment coupled to the optical fiber. The second optical segment is configured to dissipate light in the inner cladding.
    Type: Grant
    Filed: May 2, 2005
    Date of Patent: May 8, 2007
    Assignee: Lucent Technologies Inc.
    Inventors: Jon W. Engelberth, Douglas P. Holcomb, Paul F. Wysocki
  • Patent number: 7209614
    Abstract: An optical fiber tape having low polarization mode dispersion characteristics and applied to a dense wavelength multiplex (DWDM) transmission system of a transmission rate from several Gb/s to several tens of Gb/S. We have found out that the polarization mode dispersion of an optical fiber tape relates to the loss tangent (tan ?) determined when the dynamic viscoelasticity is measured, and that particularly, if the loss tangent of when a dispersion shift fiber is used is made 0.080 or more and the loss tangent of when a single mode optical fiber is used is made 0.042 or more, the polarization mode coefficient of dispersion (PMD) is reduced to 0.3 ps/?km preferable to realize a DWDM transmission system.
    Type: Grant
    Filed: March 10, 2005
    Date of Patent: April 24, 2007
    Assignee: The Furukawa Electric Co., Ltd.
    Inventors: Hiroki Tanaka, Yasuo Nakajima, Mitsunori Okada, Norimitsu Takaishi, Kenichi Mizoguchi, Hidetoshi Yasui
  • Patent number: 7206484
    Abstract: The present invention relates to a compact dispersion compensator and the like. The dispersion compensator comprises a housing and an optical fiber coil. The optical fiber coil has a coiled part constituted by a dispersion-compensating optical fiber wound like a coil while being in a bundle state with its winding distortion substantially eliminated. The housing is filled with a resin surrounding the coiled part of the optical fiber coil, whereas the coiled part is held by the resin. The dispersion-compensating optical fiber constituting the optical fiber coil has a chromatic dispersion of ?140 ps/nm/km or less at a wavelength of 1.55 ?m, whereas the housing has a volume of 500 cm3 or less. This configuration allows the dispersion compensator to attain an accumulated chromatic dispersion of ?1200 ps/nm/km or more but less than ?600 ps/nm at a wavelength of 1.55 ?m.
    Type: Grant
    Filed: January 21, 2003
    Date of Patent: April 17, 2007
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yoshinori Yamamoto, Takatoshi Kato, Takashi Fujii, Tomoyuki Yokokawa
  • Patent number: 7203408
    Abstract: An optical fibre having an NA-value of less than 0.34, which optical fibre is built up of a core and an enveloping protective coating, wherein the protective coating forms the outer layer of the optical fibre, which optical fibre has an NA-value ranging from 0.15 to 0.30, with the overall external diameter of the optical fibre corresponding to the internal diameter of an element into which the end of the optical fibre is inserted.
    Type: Grant
    Filed: December 2, 2004
    Date of Patent: April 10, 2007
    Assignee: Draka Fibre Technology B.V.
    Inventors: Pieter Matthijsse, Myrna Boon
  • Patent number: 7200310
    Abstract: Optical fiber capable of controlling attenuation losses caused by microbending on the signal transmitted thereby. The optical fiber comprises: a) an internal glass portion; b) a first coating layer of a first polymeric material surrounding said glass portion; and c) a second coating layer of a second polymeric material surrounding said first coating layer, wherein said first polymeric material has a hardening temperature lower than ?10° C., an equilibrium tensile modulus lower than 1.5 MPa, wherein said first coating layer has a thickness of from 18 ?m to 28 ?m and wherein said second coating layer has a thickness of from 10 ?m to 20 ?m.
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: April 3, 2007
    Assignee: Prysmian Cavi e Sistemi Energia S.r.l.
    Inventors: Giacomo Stefano Roba, Lidia Terruzzi, Sabrina Fogliani, Marco Arimondi, Sandra Joanna Nagelvoort, Johannes Adrianus Van Eekelen, Adrianus Gijsbertus Maria Abel, Gouke Dirk Jan Geus, Duurt Pleter Willem Alklma
  • Patent number: 7194173
    Abstract: A photoactive fiber is provided, as well as a method of fabricating such a fiber. The fiber has a conductive core including a first electrode. An organic layer surrounds and is electrically connected to the first electrode. A transparent second electrode surrounds and is electrically connected to the organic layer. Other layers, such as blocking layers or smoothing layers, may also be incorporated into the fiber. The fiber may be woven into a cloth.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: March 20, 2007
    Assignee: The Trustees of Princeton University
    Inventors: Max Shtein, Stephen R. Forrest
  • Patent number: 7187829
    Abstract: A low smoke, low toxicity fiber optic cable that provides an intermediate surface that facilitates bonding to optical connectors such as LC connectors, is provided. In a preferred embodiment, the inventive cable exhibits improved dimensional stability by minimizing or eliminating shrinkage stress on the optic fiber core.
    Type: Grant
    Filed: February 10, 2004
    Date of Patent: March 6, 2007
    Assignee: Judd Wire, Inc.
    Inventors: Mark A. Anderson, Jeffrey S. Doak, George Gong, Young Joon Kim, Jun Hong Yi
  • Patent number: 7182975
    Abstract: A method of applying a moisture barrier seal to a fiber optic coil includes mounting a fiber optic coil in a vacuum deposition chamber, so as to expose a large exterior surface area of the fiber optic coil to an interior portion of the deposition chamber. The method further includes reducing the air pressure within the chamber to a value that is less than ambient pressure outside of the chamber. The method further includes introducing a vapor form of a non-porous material, preferably parylene, into the chamber. The vapor form of the non-porous material changes into a solid state upon contact with the fiber optic coil, so as to form a conformal coat on the fiber optic coil.
    Type: Grant
    Filed: July 7, 2004
    Date of Patent: February 27, 2007
    Assignee: Northrop Grumman Corp.
    Inventor: Peter Gregory
  • Patent number: 7174079
    Abstract: Optical fiber ribbon having an optical fiber with a radiation curable internal coating and a radiation curable colored coating disposed to surround the internal coating, and a radiation curable matrix material surrounding one or more of the optical fibers to form a ribbon, in which: the colored coating has a degree of adhesion to the inner coating which is higher than the degree of adhesion to the matrix material; and the optical fiber in the optical fiber ribbon shows, upon aging of the ribbon for at least two weeks in water at 60° C., an increase in the attenuation of the transmitted signal at 1550 nm of less than 0.05 db/km with respect to the attenuation of the assembled optical fiber measured before aging.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: February 6, 2007
    Assignee: Prysmian Cavi e Sistemi Energia S.r.l.
    Inventors: Adrianus Gijsbertus Maria Abel, Albert Allan De Vries, Gouke Dirk Jan Geus, Johannes Cornelis Van Den Burg, Johannes Adrianus Van Eekelen, Alessandro Ginocchio, Massimo Pizzorno
  • Patent number: 7174078
    Abstract: An optical fiber for transmitting light, said optical fiber having an axial direction and a cross section perpendicular to said axial direction, said optical fiber comprising: (1) a first core region comprising a first core material having a refractive index Nco,1; (2) a microstructured first cladding region surrounding the first core region, said first cladding region comprising a first cladding material and a plurality of spaced apart first cladding features or elements that are elongated in the fiber axial direction and disposed in the first cladding material, said first cladding material having a refractive index Ncl,1 and each said first cladding feature or element having a refractive index being lower than Ncl,1, whereby a resultant geometrical index Nge,cl, 1? of the first cladding region is lowered compared to Ncl,1; (3) a second core region surrounding said first cladding region, said second core region comprising a second core material having a refractive index Nco,2, and (4) a second cladding regio
    Type: Grant
    Filed: April 11, 2002
    Date of Patent: February 6, 2007
    Assignee: Crystal Fibre A/S
    Inventors: Stig Eigil Barkou Libori, Jes Broeng, Anders Bjarklev, Niels Asger Mortensen, Jacob Riis Folkenberg
  • Patent number: 7171103
    Abstract: A coated optical fiber can have a primary coating and a secondary coating, where the primary coating can have good microbending resistance and is obtained by curing a composition having a high cure speed. In one example, a coated optical fiber can include as optical fiber, a primary coating and a secondary coating. The optical fiber can have an attenuation increase of less than 0.650 dB/km at 1550 nm, with the primary coating having a modulus retention ratio of at least 0.5, a glass transition temperature of ?35° C., and where the primary coating is obtained by curing a primary coating composition having a cure dose to attain 95% of the maximum attainable modulus of less than 0.65 J/cm2.
    Type: Grant
    Filed: October 3, 2005
    Date of Patent: January 30, 2007
    Assignee: DSM IP Assets B.V
    Inventors: Jan van Eekelen, Sandra Nagelvoort, Duurt Alkema, Paul Buijsen, Huimin Cao, Robert W. Johnson, David M. Szum
  • Patent number: 7171093
    Abstract: Methods for coating an optical fiber with optical fiber Bragg grating (FBG) with a hermetic coating, particularly a coating of carbon, are employed to avoid ingress of gases, vapors or fluids in the ambient environment. This ingress can be from water or hydrogen, which can diffuse in the fiber glass and cause deviation/drift in the measured Bragg measurements. Bragg gratings that maintain the grating strength at temperatures in excess of 1000° C. are used and can be formed by heating the fiber above 1000° C. in a chamber with a reactive gas that produces deposition of carbon.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: January 30, 2007
    Assignee: Optoplan, AS
    Inventors: Jon Thomas Kringlebotn, Audun Hordvik
  • Patent number: 7162130
    Abstract: Optical fiber having a glass portion; at least one protective coating of thermoplastic material having at least one thermoplastic elastomer; the thermoplastic material having the following characteristics: a modulus of elasticity value at +25° C. lower than 150 MPa, preferably at least 10 Mpa, more preferably higher than 20 Mpa, and a Vicat point higher than 85° C., preferably higher than 120° C., more preferably lower than 350° C. Preferably, the coating is a single protective coating directly positioned onto the glass portion.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: January 9, 2007
    Assignee: Prysmian Cavi e Sistemi Energia S.r.l.
    Inventors: Luca Castellani, Giovanni Brandi, Mauro Maritano, Franco Peruzzotti, Giacomo Stefano Roba, Sabrina Fogliani, Lidia Terruzzi
  • Patent number: 7162123
    Abstract: The present invention relates to an optical fiber (1?) having at least one Bragg grating (11), the fiber comprising a core (2) surrounded successively by cladding (3) and a coating (4), said fiber being obtained by writing said grating in the core and/or the cladding directly through the coating which is made of a material containing an organic substance that is substantially transparent to the ultraviolet type radiation used for writing said grating, wherein the material of said coating contains an inorganic substance that is not miscible with the organic substance and that is distributed in substantially uniform manner in said material.
    Type: Grant
    Filed: December 31, 2003
    Date of Patent: January 9, 2007
    Assignee: Alcatel
    Inventors: Sébastien Andre, Xavier Andrieu, Dalila Make, Fabrice Poussiere, Fréderic Masson
  • Patent number: 7158708
    Abstract: Provided are methods of metallizing non-conductive substrates. The methods involve: (a) providing a non-conductive substrate having an exposed non-conductive surface; (b) forming a transition metal layer over the non-conductive surface; and (c) exposing the transition metal layer to a liquid solution of a compound chosen from one or more phosphonic acids and their salts, and monoesters of phosphoric acids and their salts, having 6 or more carbon atoms. The non-conductive substrate can be, for example, an optical fiber. Also provided are metallized non-conductive substrates and metallized optical fibers prepared by the inventive methods, as well as optoelectronic packages that include such metallized optical fibers. Particular applicability can be found in the optoelectronics industry in metallization of optical fibers and in the formation of hermetic optoelectronic device packages.
    Type: Grant
    Filed: December 28, 2004
    Date of Patent: January 2, 2007
    Assignee: Rohm and Haas Electronic Materials LLC
    Inventor: Timothy J. Peret
  • Patent number: 7158707
    Abstract: An optical insulated core with a coated optical fiber (2) shows a core jacket (4) with a core jacket material containing polyvinylchloride (41) which is applied to the coating of the optical fiber. It contains a solid component (42) distributed within the core jacket material, which produces a mechanical separation effect against the coating of the optical fiber. The solid component (42) is mixed and distributed into the core jacket material during a compounding process. Thus the core jacket can be removed from the coating of the optical fiber in a simple way.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: January 2, 2007
    Assignee: CCS Technology, Inc
    Inventors: Nadja Will, Holger Will, Joachim Schuchmann, Swen Tischer
  • Patent number: 7155100
    Abstract: An optical fiber comprises a flame retardant tight-buffer coating. The tight-buffer coating has a limiting oxygen index of at least 20% and preferably has a durable tensile strength. Flame retardant, inner primary, outer primary, ink, ink base and single coatings and coating compositions as well as flame-retardant matrix materials are also provided.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: December 26, 2006
    Assignee: DSM IP Assets B.V.
    Inventors: Edward J. Murphy, Nancy L. Coster, Keri Lynn Unterzuber, Christopher Todd Baker
  • Patent number: 7155099
    Abstract: To overcome problems of fabricating conventional core-clad optical fibre from non-silica based (compound) glass, it is proposed to fabricate non-silica based (compound) glass optical fibre as holey fibre i.e. one contining Longitudinal holes in the cladding. This removes the conventional problems associated with mismatch of the physical properties of the core and clad compound glasses, since a holey fibre can be made of a single glass composition. With a holey fibre, it is not necessary to have different glasses for the core and cladding, since the necessary refractive index modulation between core and cladding is provided by the microstructure of the clad, i.e. its holes, rather than by a difference in materials properties between the clad and core glasses. Specifically, the conventional thermal mismatch problems between core and clad are circumvented.
    Type: Grant
    Filed: August 13, 2001
    Date of Patent: December 26, 2006
    Assignee: University of Southampton
    Inventors: Neil Gregory Raphael Broderick, Daniel William Hewak, Tanya Mary Monro, David John Richardson, Yvonne Deana West
  • Patent number: 7155101
    Abstract: A method of making a fiber optic accelerometer includes (a) drawing an optical fiber through a resin; (b) winding the resin coated fiber onto a disc mounted on an assembly having a central shaft; and (c) curing the resin-coated fiber. The optical fiber may be drawn through a resin by providing a container filled with a resin having an orifice therethrough and drawing the fiber through the orifice. The resin may be cured such that the fiber is bonded to the disc by curing the resin to the fiber and the disc at the same time.
    Type: Grant
    Filed: May 11, 2004
    Date of Patent: December 26, 2006
    Assignee: Schlumberger Technology Corporation
    Inventors: Jagdish Shah, Rogerio T. Ramos, Olivier Sindt, Philip Dryden, Cliff Evans, Mark Dalton
  • Patent number: 7151880
    Abstract: A dispersion-managed optical soliton transmission system uses alternating spans of positive-dispersion optical fiber having a negative slope and negative-dispersion optical fiber having a positive slope. For wavelength division multiplexing, the system has a map strength preferably between 4 and 8. An absolute value of average group velocity dispersion between 0.5 and 0.0 ps2/km, and soliton power may vary between channels within 1 dB. Map periods, amplifier spacings, and dispersion values across a wavelength range of 1530–1600 nm are disclosed for bit rates of 10 and 40 Gbits/sec to maintain the ranges of average group velocity dispersion and soliton power.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: December 19, 2006
    Assignee: Prysmian Cavi E Sistemi Energia S.r.L.
    Inventor: Francesco Sartori
  • 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: 7139489
    Abstract: A method of compensating for chromatic dispersion in an optical signal transmitted on a long-haul terrestrial optical communication system including a plurality of spans, including: allowing chromatic dispersion to accumulate over at least one of the spans to a first predetermined level; and compensating for the first pre-determined level of dispersion using a dispersion compensating fiber causing accumulation of dispersion to a second predetermined level. There is also provided a hybrid Raman/EDFA amplifier including a Raman portion and an EDFA portion with a dispersion compensating fiber disposed therebetween. An optical communication system and a method of communicating an optical signal using such a Raman/EDFA amplifier are also provided.
    Type: Grant
    Filed: November 16, 2001
    Date of Patent: November 21, 2006
    Assignee: Tyco Telecommunications (US) Inc.
    Inventors: Morten Nissov, Alexei A. Pilipetskii, Ekaterina Golovchenko, Jonathan Nagel, Sergey Ten
  • Patent number: 7139459
    Abstract: Visible and infra-red spectral filters based on arrays of uncoupled identical waveguides having coherently modulated cross sections offer many unique advantages, such as independence of the spectral position of the Bragg-resonance based transmission or reflection features on the angle of light incidence. The resulting spectral filters are mechanically and optically stable, do not degrade over time, and offer superior transmittance for use as band pass, narrow band pass, band blocking, short pass and long pass filters. Such filters are useful for a wide variety of applications including but not limited to biomedical analysis systems, spectroscopy and optical communications systems.
    Type: Grant
    Filed: October 16, 2003
    Date of Patent: November 21, 2006
    Assignee: Lake Shore Cryotronics, Inc.
    Inventors: Vladimir Kochergin, Philip Swinehart
  • Patent number: 7136558
    Abstract: An optical fiber for communications systems, the fiber being designed to ensure a compensation of Kerr effects. The fiber has a profile which ensures that changes in power produce changes in distribution of power between core and cladding, such that the phase change associated with the changed spatial distribution of the power, is equal and opposite to the phase change due to Kerr Effect.
    Type: Grant
    Filed: April 29, 2003
    Date of Patent: November 14, 2006
    Assignee: Nortel Networks Limited
    Inventors: Richard E Epworth, Vincent Handerek, Alan Robinson
  • Patent number: 7130516
    Abstract: An optical waveguide comprises a core, an inner cladding laterally surrounding the core, and an outer cladding laterally surrounding the inner cladding, wherein the core, inner cladding, and outer cladding have a depressed well configuration. The waveguide operates in three or more wavelength bands, wherein a first wavelength band is centered at about 1300 nm, and wherein a second wavelength band is centered at about 1625 nm. The waveguide has bend losses that are less than or equal to 1.0 dB/turn when measured on a 5 mm radius bend at 1625 nm and bend losses that are less than or equal to 1.5 dB/turn when measured on a 5 mm radius bend at 1650 nm.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: October 31, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Junjun Wu, Craig R. Sykora
  • Patent number: 7130515
    Abstract: An optical waveguide comprises a core, an inner cladding laterally surrounding the core, and an outer cladding laterally surrounding the inner cladding, wherein the core, inner cladding, and outer cladding have a depressed well configuration. The waveguide operates in three or more wavelength bands, wherein a first wavelength band is centered at about 1300 nm, and wherein a second wavelength band is centered at about 1625 nm. The waveguide has bend losses that are less than or equal to 0.7 dB/turn when measured on a 10 mm radius bend at 1625 nm.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: October 31, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Wayne F. Varner, Craig R. Sykora
  • Patent number: 7122247
    Abstract: A radiation-curable fiber optic coating composition for an inner primary coating includes a coloring agent, preferably a dye or a dye precursor, compatible with the fiber of the fiber optic and capable of imparting a pre-selected color to the inner primary coating, or another coating. The coloring agent can be a reactive dye. Any of the dyes preferably is stabilized by a stabiliser in the colored coating layer, or, preferably, in a more exterior layer.
    Type: Grant
    Filed: July 31, 2003
    Date of Patent: October 17, 2006
    Assignee: DSM IP Assets B.V.
    Inventors: Lin Jibing, Montgomery I. Eva, Snowwhite E. Paul, Jr., Petisce R. James, Kotesky Anton
  • Patent number: 7120343
    Abstract: An optical fiber having at least one epoxidized polyolefin based polymer coating. The coating is formed from a crosslinkable composition having (a) at least one epoxidized polydiene oligomer having a first and a second end, the oligomer having at least one hydrocarbon chain that is substantially free of ethylenic double bonds, at least one epoxide group at the first end and at least one reactive functional group at the second end; (b) at least one hydrogenated polydiene oligomer having at least one reactive functional group capable of reacting with the epoxide groups; and (c) at least one photo-initiator. Preferably, the coating is a primary coating coated with a secondary coating.
    Type: Grant
    Filed: September 21, 2005
    Date of Patent: October 10, 2006
    Assignee: Perelli & C. S.p.A.
    Inventors: Luca Castellani, Luigia Rossiello, Andrea Pelizzoni, Raffaella Donetti, Lidia Terruzzi, Mauro Maritano
  • Patent number: 7120342
    Abstract: A UV-curable and foamable resin composition comprising a photopolymerizable urethane acrylate oligomer, a photopolymerable monomer, a photo polymerization initiator, a photolytic foaming agent selected from an azo compound, a combination of sulonium salt and an inorganic carbonate, and a mixture thereof, and a photolysis catalyst is useful for coating a fiber or ribbon bundle to be applied to an air blown fiber system.
    Type: Grant
    Filed: March 21, 2003
    Date of Patent: October 10, 2006
    Assignee: Luvantix Co., Ltd.
    Inventors: Se Lee Chang, Hwa Joong Kim, Hae Woog Choi, Jung Hyun Oh, Dae Sung Lee
  • Patent number: 7120340
    Abstract: An optically active linear single polarization device includes a linearly birefringent and linearly dichroic optical waveguide (30) for propagating light and having single polarization wavelength range (48). A plurality of active dopants are disposed in a portion (34) of the linearly birefringent and linearly dichroic optical waveguide (30) for providing operation of the waveguide in an operating wavelength range (650) for overlapping the single polarization wavelength range (48).
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: October 10, 2006
    Assignee: Corning Incorporated
    Inventors: George E. Berkey, Ming-Jun Li, Daniel A. Nolan, Donnell T. Walton, Luis A. Zenteno
  • Patent number: RE39806
    Abstract: A scintillator panel (2) comprises a radiation-transparent substrate(10), aflat resin film (12) formed on the substrate (10), a reflecting film (14) formed on the flat resin film (12), a deliquescent scintillator (16) formed on the reflecting film (14), and a transparent organic film (18) covering the scintillator (16).
    Type: Grant
    Filed: October 21, 2003
    Date of Patent: September 4, 2007
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Toshio Takabayashi, Takuya Homme, Hiroto Sato