Interchannel nonlinear crosstalk in analog polarization modulated WDM systems

Crosstalk in an analog polarization modulation (PolM) system is studied analytically and experimentally. It is shown capable of producing dramatically lower crosstalk levels than intensity modulation (IM) at higher modulation frequencies (greater than 1 GHz) for a system with 200 GHz channel spacing. Calculations based on the developed analytical model show excellent agreement with experimental results and allow us to determine the necessary launch conditions for low-crosstalk transmission in a polarization modulation link