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REFERENCE-BASED IN-BAND OSNR MEASUREMENT ON POLARIZATION-MULTIPLEXED SIGNALS
REFERENCE-BASED IN-BAND OSNR MEASUREMENT ON POLARIZATION-MULTIPLEXED SIGNALS
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机译:极化复信号上基于参考的带内OSNR测量
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摘要
There is provided a method for determining an in-band noise parameter, such as the Optical Signal-to-Noise Ratio (OSNR), on an optical signal-under-test (SUT) propagating along an optical communication link and comprising a data-carrying signal contribution of any arbitrary degree of polarization and a noise contribution. A spectral shape trace of data-carrying signal contribution in the SUT is estimated using a reference optical spectrum trace of a reference signal which comprises a data-carrying signal contribution that is spectrally representative of the data-carrying signal contribution of the SUT and a noise contribution which is at least approximately known. The data-carrying signal contribution is mathematically discriminated from said noise contribution in the SUT using the spectral shape trace and the test optical spectrum trace. The in-band noise parameter is then determined at least from the mathematically discriminated noise contribution.
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