Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising them

Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising them

  • CN 101,729,148 A
  • Filed: 02/23/2006
  • Published: 06/09/2010
  • Est. Priority Date: 05/23/2005
  • Status: Active Application
First Claim
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1. light sending device, the drive signal generation unit that it comprises phase-modulator and is used to drive this phase-modulator, whereinThis phase-modulator comprises:

  • phase-shift unit is used for providing suitable phase difference between a pair of beam splitting light signal on the fiber waveguide;

    The data-modulated unit is used on the beam splitting fiber waveguide light signal being carried out phase modulated;

    And electrode, be used to the low frequency signal that superposes, and whereinDescribed light sending device also comprises;

    The low frequency signal superpositing unit is used to produce a plurality of low frequency signals with suitable phase difference, and is used for these low frequency signals are offered electrode on the described beam splitting fiber waveguide;

    Monitoring means is used for after the coupling of described beam splitting fiber waveguide, and in maximum power, minimum power and the phase place of the high order harmonic component signal that is superimposed upon low frequency signal on the described light signal or this low frequency signal at least one monitored;

    AndThe phase difference control unit is used for controlling described phase-shift unit according to the output of described monitoring means, to obtain suitable phase difference.

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