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    METHOD AND DEVICE FOR CONTROLLING PHASE OF CLOCK SIGNAL IN INTER-TWO-POINT OPTICAL TRANSMISSION
    1.
    发明专利
    METHOD AND DEVICE FOR CONTROLLING PHASE OF CLOCK SIGNAL IN INTER-TWO-POINT OPTICAL TRANSMISSION 失效

    公开(公告)号：JPH10154959A

    公开(公告)日：1998-06-09

    申请号：JP31775297

    申请日：1997-11-05

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： GAMBINI PIERO ,  PULEO MARIO

    IPC: H04B10/04 ,  H04B10/00 ,  H04B10/06 ,  H04B10/08 ,  H04B10/142 ,  H04B10/152 ,  H04B10/22 ,  H04L7/00

    Abstract: PROBLEM TO BE SOLVED: To provide the method and device to control accurately a phase of a clock signal transferred along with an optical fiber between two points. SOLUTION: A signal to be controlled is sent along with an optical fiber 3 by a wavelength tunable laser 2 whose radiation wavelength is varied as a function of possible phase fluctuation in a reception signal with respect to a reference phase. At a receiving end of the optical fiber 3, part of power of the reception signal is extracted and sent back toward a transmission end, then a control signal is generated. At a transmitter end, a phase of part of the power is compared with a phase of an original signal and the tunable laser 2 is driven so that clock information with a wavelength is sent to be reached to the receiving end having the reference phase.

    4.
    发明专利
    未知

    公开(公告)号：IT1272079B

    公开(公告)日：1997-06-11

    申请号：ITTO930956

    申请日：1993-12-16

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： GAMBINI PIERO ,  VEZZONI EMILIO

    IPC: H04B10/00 ,  H04B10/02 ,  H04L7/00 ,  H04Q3/00 ,  G06F

    Abstract: Within an optical ATM node, an ATM cell to be synchronized is sent into a segment of pre-determined length of an optical fibre with a high time dispersion (FD), after having been associated, in a tunable wavelength converter (CL), to an optical carrier with a wavelength that is different from that with which the cell itself was received and such that, as an effect of the transit the fiber (FD), the cell reaches the input side of a switching element (Em1...Emh) of the node (NC) at a predetermined instant.

    7.
    发明专利
    未知

    公开(公告)号：ITTO930956D0

    公开(公告)日：1993-12-16

    申请号：ITTO930956

    申请日：1993-12-16

    Applicant: CSELT CENTRO STUDI LAB TELECOM

    Inventor： GAMBINI PIERO ,  VEZZONI EMILIO

    IPC: H04B10/00 ,  H04B10/02 ,  H04L7/00 ,  H04Q3/00

    Abstract: Within an optical ATM node, an ATM cell to be synchronized is sent into a segment of pre-determined length of an optical fibre with a high time dispersion (FD), after having been associated, in a tunable wavelength converter (CL), to an optical carrier with a wavelength that is different from that with which the cell itself was received and such that, as an effect of the transit the fiber (FD), the cell reaches the input side of a switching element (Em1...Emh) of the node (NC) at a predetermined instant.

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