Cross comparison of the nonlinear impairments caused by 10Gbit/s neighboring channels on a 40Gbit/s channel modulated with various formats, and over various fiber types

We evaluate the impact of lOGbit/s NRZ channels on the performance of one 40 Gbit/s PSBT, DQPSK or DPSK channel over two fiber types. DPSK and PSBT are much less affected by 10 Gbit/s neighbors than DQPSK.