| 摘要 |
A method and apparatus for improving the accuracy of in-band OSNR measuremen ts 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 prio r to conventional polarization control and filtering.
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