中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

130 records (took 0.042 seconds)

    Method of making optical fibers
    63.
    发明专利
    Method of making optical fibers 未知

    公开(公告)号：AU3922400A

    公开(公告)日：2000-11-02

    申请号：AU3922400

    申请日：2000-03-23

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE E ,  SRIKANT V

    IPC: C03B37/025 ,  C03B37/027 ,  G02B6/036 ,  G02B6/18

    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 an 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. In addition, a family of profiles is presented which may be used to produce very low dispersion slope fibers. When used in conjunction with alternating positive and negative dispersion regions, lower net dispersion slope can be achieved. Alternatively, the family of profiles is useful in conventional WDM applications.

    FIBER OPTIC SENSOR
    64.
    发明专利
    FIBER OPTIC SENSOR 未知

    公开(公告)号：CA2355105A1

    公开(公告)日：2000-06-29

    申请号：CA2355105

    申请日：1999-11-30

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE E ,  KROL MARK F ,  NOLAN DANIEL A

    IPC: G01K11/12 ,  G01B11/16 ,  G01D5/353 ,  G01K11/32 ,  G01L1/24 ,  G02B6/10 ,  G01B9/02 ,  G02B6/26

    Abstract: A fiber optic sensor (10) for simultaneously and independently measuring temperature and axial stress includes a polarized light source (80) and a detector assembly (90) connected to a Mach-Zehnder device (20), which includ es a pair of polarization-maintaining fibers (30, 40) that have known strain an d temperature response curves. A coupling region (50) is formed between the polarization-maintaining fibers for evanescent coupling of the fibers. Each polarization-maintaining fiber (30, 40) has a plurality of fiber segments (3 2, 34, 36, 42, 44, 46) in which the elliptical cores are rotated 45 degrees relative to the core of the preceding segment. A segment (34, 44) from each fiber is disposed in an environment (100) to be measured. A phase shift induced by temperature or stress in each of the fibers is detected, and the strain and temperature are derived from the detected phase shift. The fiber optic sensor is capable of dual operation as both a temperature sensor and a n axial stress sensor.

    Method of making a glass preform
    65.
    发明专利
    Method of making a glass preform 未知

    公开(公告)号：AU5769399A

    公开(公告)日：1999-12-13

    申请号：AU5769399

    申请日：1999-04-14

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE E ,  CHU POLLY W ,  CROSSLAND CARL E ,  MOORE LISA A ,  QI GANG ,  SOLOSKY JOHN W

    IPC: G02B6/00 ,  C03B37/012 ,  C03B37/027

    Abstract: A method of making a glass article such as an optical waveguide preform is disclosed. The method comprises drawing a rod in at least two steps. In the first step an elongated, consolidated preform having an aperture therethrough is drawn to a reduced diameter preform. The second step involves drawing the reduced diameter preform into a rod, preferably at a lower temperature than the first step. The method substantially reduces the formation of inclusions in the glass article during drawing.

    67.
    发明专利
    未知

    公开(公告)号：BR9706588A

    公开(公告)日：1999-07-20

    申请号：BR9706588

    申请日：1997-07-14

    Applicant: CORNING INC

    Inventor： ANTOS JOSEPH A ,  BERKEY GEORGE E ,  HAWTOF DANIEL W ,  HOLMES THOMAS G ,  LIU YANMING

    IPC: G02B6/02 ,  C03B37/023 ,  G02B6/036 ,  H04B10/18 ,  G02B6/22

    Abstract: A dispersion compensating single mode optical waveguide fiber designed to change the wavelength window of operation of a link from 1301 nm to 1550 nm. The dispersion compensating waveguide fiber is characterized by a core glass region refractive index profile comprised of at least three segments (2, 4, 6, 8). The segment (2) on the waveguide center has a positive relative refractive index. At least one segment (4, 8), spaced apart from the waveguide centerline has a negative relative refractive index.

    WAVEGUIDE PROFILE FOR LARGE EFFECTIVE AREA
    68.
    发明专利
    WAVEGUIDE PROFILE FOR LARGE EFFECTIVE AREA 未知

    公开(公告)号：CA2307579A1

    公开(公告)日：1999-05-06

    申请号：CA2307579

    申请日：1998-10-06

    Applicant: LIU YANMING ,  CORNING INC

    Inventor： BERKEY GEORGE E ,  LIU YANMING

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

    Abstract: Disclosed is a single mode optical waveguide fiber having a segmented core design. The core may have two or more segments. The highest refractive index portion (41) of the core is spaced apart from the centerline of the waveguide fiber. The relative index of the first or center segment (21) of the core is negative, where the reference refractive index is taken to be the minimum index clad. This family of core profiles provides effective areas in the range of 110 .mu.m2 to 150 .mu.m2 in the operating window around 1550 nm. Dashed lines (6) show alternative shapes for the index profiles (2 and 4). The negative relative index annular region illustrated by dashed line (5) shows the optional third core region having a negative relative index, using the minimum clad index as the reference index.

    Dispersion managed optical waveguide fiber
    69.
    发明专利
    Dispersion managed optical waveguide fiber 未知

    公开(公告)号：AU8583298A

    公开(公告)日：1999-03-01

    申请号：AU8583298

    申请日：1998-07-23

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE E

    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.

Patent Agency Ranking