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    METHOD FOR MEASURING REFLECTION LOSS AT OPTICAL FIBER CONSTITUTING ELEMENT AND DEVICE THEREFOR
    1.
    发明专利
    METHOD FOR MEASURING REFLECTION LOSS AT OPTICAL FIBER CONSTITUTING ELEMENT AND DEVICE THEREFOR 失效

    公开(公告)号：JPH10232316A

    公开(公告)日：1998-09-02

    申请号：JP4295998

    申请日：1998-02-10

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： BOTTAZZI LORENZO ,  DONATI SILVANO ,  SOREL MARC ,  TAMBOSSO TIZIANA

    IPC: G02B6/00 ,  G01M11/00

    Abstract: PROBLEM TO BE SOLVED: To eliminate all of the optical constituting elements existing outside a light source and associated aligning stages and to enable the use of a continuous wave laser diode by collecting the radiation generated from the interaction between the radiation generated at the light source and the optical fiber constituting elements and detecting this radiation. SOLUTION: The semiconductor laser light source 11 delivers the radiation of the wavelength λ through an end face 13 subjected to an antireflection treatment into a fiber length 19. The photodiode 12 is placed behind the light source 11 on a supporting table 10 and is so arranged as to detect the laser radiation from a rear part mirror 3. The fiber 19 is wound 5 to 10 times on a phase modulator 14 and generates periodic signals in the output of the photodiode 12. The effect by the reflection in the optical fiber constituting elements is made identifiable by these periodic signals and these signals are made into a DC signal. The novel measurement technique based on the coherent interaction with the reflected radiation in the same cavity resonator and the oscillation electromagnetic field existing in the cavity resonator is obtd.

    4.
    发明专利
    未知

    公开(公告)号：DE859225T1

    公开(公告)日：1999-11-04

    申请号：DE98102478

    申请日：1998-02-13

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： BOTTAZZI LORENZO ,  DONATI SILVANO ,  SOREL MARC ,  TAMBOSSO TIZIANA

    IPC: G02B6/00 ,  G01M11/00

    Abstract: A method and device are provided for measuring return losses in optical fibre components, wherein the radiation reflected by the optical fibre component (17) is reintroduced into the cavity of the source (11) and the value of such losses is obtained by measuring the amplitude of the radiation resulting from the combination between such reflected radiation and the radiation generated by the source (11).

    5.
    发明专利
    未知

    公开(公告)号：IT1311362B1

    公开(公告)日：2002-03-12

    申请号：ITTO990989

    申请日：1999-11-16

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： GALTAROSSA ANDREA ,  PALMIERI LUCA ,  SCHIANO MARCO ,  TAMBOSSO TIZIANA

    IPC: G01M11/02 ,  G01M11/00 ,  H04B10/2569

    Abstract: The process and apparatus to enable measurement of polarization dispersion of a single-mode optical fibre by launching measurement light at one end of the fibre and analyzing polarization of the light reflected by the other end and collected at such launch end. Optical or electronic masking of light reflected by the near end of the fibre is performed during launch.

    6.
    发明专利
    未知

    公开(公告)号：IT1291028B1

    公开(公告)日：1998-12-14

    申请号：ITTO970126

    申请日：1997-02-14

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： BOTTAZZI LORENZO ,  DONATI SILVANO ,  SOREL MARC ,  TAMBOSSO TIZIANA

    IPC: G01M11/00 ,  G02B6/00

    Abstract: A method and device are provided for measuring return losses in optical fibre components, wherein the radiation reflected by the optical fibre component (17) is reintroduced into the cavity of the source (11) and the value of such losses is obtained by measuring the amplitude of the radiation resulting from the combination between such reflected radiation and the radiation generated by the source (11).

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