Determining in-band optical signal-to-noise ratios in...

Details Determining in-band optical signal-to-noise ratios in... Determining in-band optical signal-to-noise ratios in...

H - Electricity

04

B

H04B 10/08 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2669249

A method and apparatus for improving the accuracy of in-band OSNR measurements using a conventional polarization extinction or polarization-nulling method. In particular, the severe degradations of the polarization extinction that result from slow and fast polarization fluctuations in the optical signal components during the in-band OSNR measurement are substantially mitigated by rapidly and/or randomly changing the state of polarization prior to conventional polarization control and filtering.

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