METHOD AND SYSTEM FOR DETERMINING IN-BAND OPTICAL NOISE

摘要

There is provided a method for determining the in-band noise in agile mul tichannel Dense Wavelength Division Multiplexing (DWDM) optical systems, whe re the interchannel noise is not representative of the in-band noise in the optical channel. The method relies on the analysis of two observations of th e same input optical signal. In the two observations, the linear relationshi p between the optical signal contribution and the optical noise contribution (i.e. the observed OSNR) is different, which allows the discrimination of t he signal and noise contributions in the input optical signal. In a first ap proach, the two observations are provided by polarization analysis of the in put optical signal. In a second, the input optical signal is obtained using two different integration widths.