Effect of Cross-Polarization Induced Crosstalk on a PDM-QPSK Coherent Homodyne Optical System

What is it about?

We presented an analytical approach to find the effect of cross-polarization (XPol) induced crosstalk on the bit error rate (BER) performance of a polarization division multiplex (PDM) quadrature phase shift keying (QPSK) optical transmission system with polarization diversity receiver.

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Why is it important?

Cross-polarization have deleterious effects in optical systems causing interchannel crosstalk to the co-propagating subchannels. The misalignment angle causes fading of the received signal and also introduces crosstalk. Addition of other noises and increase in the data rate worsens the deleterious effect.