中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

82 records (took 0.058 seconds)

    61.
    发明专利
    未知

    公开(公告)号：DE69805934T2

    公开(公告)日：2003-01-16

    申请号：DE69805934

    申请日：1998-09-24

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE EDWARD

    IPC: G02B6/036 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018

    Abstract: A method of making a segmented core optical waveguide preform for making fiber that is resistant to attenuation increases due to hydrogen and heat aging. A first core region comprising a silica glass rod containing at least a first dopant such as fluorine is inserted into a central opening of a second core region comprising silica soot containing a second dopant such as germanium. The first core region and second core region are consolidated together to form a segmented core region and cladding is deposited on the outer surface of the segmented core region. The second core region having the central opening is made by depositing silica soot containing the second dopant and removing the mandrel.

    METHOD OF MAKING POLARIZATION RETAINING FIBER
    63.
    发明专利
    METHOD OF MAKING POLARIZATION RETAINING FIBER 未知

    公开(公告)号：CA2060016C

    公开(公告)日：2002-04-09

    申请号：CA2060016

    申请日：1992-01-24

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE EDWARD ,  HAWK ROBERT MARTIN ,  TARCZA STEVEN HOWARD

    IPC: C03B37/012 ,  C03B37/014 ,  C03B37/027 ,  G02B6/024

    Abstract: Disclosed is a method of making a polarization retaining single-mode optical fiber. There is initially formed a draw blank having diametrically opposed longitudinal apertures in the cladding glass parallel to the core glass region. The draw blank is drawn into a fiber under such conditions that the apertures close as the fiber is being drawn. The flow of surrounding glass, including the core glass region, toward the collapsing apertures, causes the core to assume an elliptical shape. The apertures are of such cross-sectional area and spacing from the core that the core develops the desired aspect ratio.

    65.
    发明专利
    未知

    公开(公告)号：DE69033798D1

    公开(公告)日：2001-10-18

    申请号：DE69033798

    申请日：1990-07-04

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE EDWARD ,  KROWIAK MARK THOMAS ,  SAUNDERS DANIEL PAUL

    IPC: G02B6/26 ,  C03B23/047 ,  G02B6/24 ,  G02B6/255 ,  G02B6/28

    Abstract: A method is described for making a low reflectance optical fiber end termination. This comprises providing a region of uncoated glass optical fiber having a predetermined diameter and a first end, and heating the fiber at a location remote from the first end. The fiber is then pulled on opposite sides of the heated location to sever the end of the fiber, thereby leaving on the optical fiber a tapered end section. The end of said tapered section is further heated to lower the viscosity of the material thereof by an amount sufficient to cause the material to recede back along the fiber and form a rounded end thereon. An apparatus for carrying out this method is also described.

    66.
    发明专利
    未知

    公开(公告)号：BR9811141A

    公开(公告)日：2000-07-18

    申请号：BR9811141

    申请日：1998-07-23

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE EDWARD

    IPC: G02B6/036 ,  G02B6/02 ,  G02B6/22 ,  G02B6/16

    Abstract: Disclosed is a single mode optical waveguide fiber designated for compensating for positive dispersion in optical telecommunications systems. A key characteristic of the invention is that the novel dispersion compensating waveguide, viz., a waveguide having large negative dispersion, contains no dopants, such as fluorine, which lower the refractive index of silica. A refractive index profile design which includes a high refractive index center segment (5) surrounded by a plurality of alternating high (6, 10, 13) and low refractive index segments, provides a dispersion compensation fiber which has the optical properties required for the system to be compensated without sacrificing bend resistance, increasing splicing loss, or elevating polarization mode dispersion.

    67.
    发明专利
    未知

    公开(公告)号：BR9808613A

    公开(公告)日：2000-05-30

    申请号：BR9808613

    申请日：1998-01-29

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE EDWARD

    IPC: G02B6/00 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  G02B6/036 ,  C03B37/027

    Abstract: Disclosed is a method of making an optical fiber preform having at least one annular region of depressed refractive index. A tube of silica doped with fluorine and/or boron is overclad with silica soot. A core rod is inserted into the overclad tube and the resultant assembly is heated while chlorine flows between the tube and the core rod to clean the adjacent surfaces. When the soot sinters, the tube collapses onto and fuses to the rod. The resultant tubular structure is formed into an optical fiber which exhibits low attenuation as a result of the low seed count at the interface between the inner core and the region that is doped with fluorine and/or boron.

    Method of making optical fibres.
    68.
    发明专利
    Method of making optical fibres. 未知

    公开(公告)号：ZA992622B

    公开(公告)日：1999-10-08

    申请号：ZA992622

    申请日：1999-04-09

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE EDWARD

    IPC: G02B6/00 ,  C03B37/025 ,  C03B37/027 ,  G02B6/02 ,  G02B ,  D01D ,  C03B ,  C03C

    Abstract: An optical fiber and method of making, wherein the optical fiber alternates between regions having different diameters along its length, wherein the refractive index of said blank and the diameters of said fiber are chosen to result in a fiber having alternating regions of positive and negative dispersion at a wavelength which is greater than 1480 nm, yet preferably has a low net dispersion and dispersion slope. A preferred such profile consists of a core region surrounded by a cladding region, said core region comprised of a central core region which is updoped with respect to said cladding region, said central core region surrounded by a moat region which is downdoped with respect to said cladding region, and said moat region is surrounded by an annular ring region which is updoped with respect to said cladding region.

Patent Agency Ranking