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    Active fiber loss monitor and method
    1.
    发明专利
    Active fiber loss monitor and method 审中-公开
    主动纤维损失监测和方法

    公开(公告)号：JP2005229598A

    公开(公告)日：2005-08-25

    申请号：JP2005026353

    申请日：2005-02-02

    Applicant: Corning Inc ,  コーニング・インコーポレーテッド

    Inventor： EVANS ALAN F ,  GRAY STUART ,  SUDARSHANAM VENKATAPURAM S

    IPC: H04B10/02 ,  H04B10/08 ,  H04B10/12 ,  H04J14/00 ,  H04J14/02

    CPC classification number: H04B10/071 ,  H04B10/0771 ,  H04B10/85

    Abstract: PROBLEM TO BE SOLVED: To provide a system for detecting a small fiber loss on a fiber. SOLUTION: The system includes a first channel 106 having a first wavelength coupled to the fiber 104, and a second channel 108 having a second wavelength different from the first wavelength and coupled to the fiber 104. At least one photodetector circuitry 110 is coupled to the fiber 104 at a monitor point 112 for detecting a change in the power ratio between the first and second channels for detecting the small fiber communication loss 102 at a certain location along the fiber 104. COPYRIGHT: (C)2005,JPO&NCIPI

    Abstract translation: 要解决的问题：提供一种用于检测光纤上的小纤维损耗的​​系统。 解决方案：该系统包括具有耦合到光纤104的第一波长的第一通道106和具有不同于第一波长的第二波长并耦合到光纤104的第二通道108.至少一个光电检测器电路110是 在监视点112处耦合到光纤104，用于检测第一和第二信道之间的功率比的变化，用于检测沿着光纤104的特定位置处的小光纤通信损耗102。版权所有（C）2005 ，JPO＆NCIPI

    ISOTOPICALLY ALTERED OPTICAL FIBER
    3.
    发明专利
    ISOTOPICALLY ALTERED OPTICAL FIBER 未知

    公开(公告)号：AU2002351376A1

    公开(公告)日：2003-07-09

    申请号：AU2002351376

    申请日：2002-12-11

    Applicant: CORNING INC

    Inventor： HOUSE KEITH L ,  KOCH KARL W III ,  POWERS DALE R ,  WEST JAMES A ,  ALLAN DOUGLAS C ,  BROWN JOHN T ,  CHACON LISA C ,  ELLISON ADAM J G ,  FAJARDO JAMES C ,  GRAY STUART

    IPC: G02B6/00 ,  C03B37/014 ,  C03B37/018 ,  C03C13/04 ,  G02B6/02 ,  G02B6/036 ,  G02F1/35

    Abstract: An isotopically-altered, silica based optical fiber is provided having lower losses, broader bandwidth, and broader Raman gain spectrum characteristics than conventional silica-based fiber. A heavier, less naturally abundant isotope of silicon or oxygen is substituted for a lighter, more naturally abundant isotope to shift the infrared absorption to a slightly longer wavelength. In one embodiment, oxygen-18 is substituted for the much more naturally abundant oxygen-16 at least in the core region of the fiber. The resulting isotopically-altered fiber has a minimum loss of 0.044 dB/km less than conventional fiber, and a bandwidth that is 17 percent broader for a loss range between 0.044-0.034 dB/km. The fiber may be easily manufactured with conventional fiber manufacturing equipment by way of a plasma chemical vapor deposition technique. When a 50 percent substitution of oxygen -18 for oxygen-16 is made in the core region of the fiber, the Raman gain spectrum is substantially broadened.

    Double-pumped raman amplifier
    7.
    发明专利
    Double-pumped raman amplifier 未知

    公开(公告)号：AU2002348338A1

    公开(公告)日：2003-09-02

    申请号：AU2002348338

    申请日：2002-11-05

    Applicant: CORNING INC

    Inventor： GUY STEPHEN C ,  PASSALUGO JAMES R ,  GRAY STUART

    IPC: H01S3/067 ,  H01S3/094 ,  H01S3/30 ,  H01S3/06

    Abstract: A double pumped Raman amplifier is provided that increases gain over a same length of gain fiber without significantly increasing a percentage of noise. The amplifier may include a source of pump light coupled to the output end of a coil of Raman gain fiber, and a reflector coupled to the input end of the coil which may be either a mirror, or a fiber Bragg grating. Alternatively, a beam splitter may be connected to the source of pump light and the resulting split output may be coupled to both the input and output ends of the gain fiber. The increase in amplification efficiency allows the optical fiber used in components such as dispersion compensating modules to also be used as Raman gain fiber in such amplifiers.

    Isotopically altered optical fiber
    8.
    发明专利
    Isotopically altered optical fiber 未知

    公开(公告)号：AU2002351376A8

    公开(公告)日：2003-07-09

    申请号：AU2002351376

    申请日：2002-12-11

    Applicant: CORNING INC

    Inventor： KOCH KARL W III ,  BROWN JOHN T ,  GRAY STUART ,  WEST JAMES A ,  HOUSE KEITH L ,  CHACON LISA C ,  ELLISON ADAM J G ,  FAJARDO JAMES C ,  POWERS DALE R ,  ALLAN DOUGLAS C

    IPC: G02B6/00 ,  C03B37/014 ,  C03B37/018 ,  C03C13/04 ,  G02B6/02 ,  G02B6/036 ,  G02F1/35

    Abstract: An isotopically-altered, silica based optical fiber is provided having lower losses, broader bandwidth, and broader Raman gain spectrum characteristics than conventional silica-based fiber. A heavier, less naturally abundant isotope of silicon or oxygen is substituted for a lighter, more naturally abundant isotope to shift the infrared absorption to a slightly longer wavelength. In one embodiment, oxygen-18 is substituted for the much more naturally abundant oxygen-16 at least in the core region of the fiber. The resulting isotopically-altered fiber has a minimum loss of 0.044 dB/km less than conventional fiber, and a bandwidth that is 17 percent broader for a loss range between 0.044-0.034 dB/km. The fiber may be easily manufactured with conventional fiber manufacturing equipment by way of a plasma chemical vapor deposition technique. When a 50 percent substitution of oxygen -18 for oxygen-16 is made in the core region of the fiber, the Raman gain spectrum is substantially broadened.

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