Modulation format dependent phase noise caused by intra-channel nonlinearity

The phase noise induced by the intra-channel nonlinearity with DP-16QAM is found to be higher than that with DP-QPSK in 1600km transmission experiments. The main reason is identified as the large IXPM in 16QAM based on the proposed nonlinear model.

[1]  E. Ciaramella,et al.  Analytical approximation of nonlinear distortions , 2005, IEEE Photonics Technology Letters.

[2]  A. Mecozzi,et al.  Analysis of intrachannel nonlinear effects in highly dispersed optical pulse transmission , 2000, IEEE Photonics Technology Letters.