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AUTOMATIC MEASUREMENT AND GAIN CONTROL OF DISTRIBUTED RAMAN AMPLIFIERS

  • US 20110141552A1
  • Filed: 11/16/2010
  • Published: 06/16/2011
  • Est. Priority Date: 12/14/2009
  • Status: Active Grant
First Claim
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1. An apparatus for automatic gain measurement and control of a distributed Raman amplifier (DRA), the DRA providing Raman pump power at one or more pump wavelengths and being optically coupled to a transmission fiber which carries communication signals having wavelengths in a signal communication band, the apparatus comprising:

  • a. a detection unit operative to measure, during operation of the DRA, the optical power of a filtered component of the light entering the DRA from the transmission fiber; and

    ,b. a gain calculation and control (GCC) unit electrically coupled to the detection unit and operative to calculate a signal Raman gain property based on the measured optical power.

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