Polarization-insensitive wavelength multicasting of RZ-DPSK signal based on four-wave mixing in a photonic crystal fiber with residual birefringence

摘要

We demonstrate polarization-insensitive wavelength multicasting of RZ-DPSK signal. The input signal is copied to four different wavelengths using four-wave mixing with unequally spaced pumps in a dispersion-flattened, highly nonlinear photonic crystal fiber with residual birefringence.