Nonlinearly broadened phase-modulated continuous-wave laser frequency combs characterized using DPSK decoding

9.953 GHz phase-modulated continuous-wave laser combs are spectrally broadened via nonlinear propagation in normal and anomalous dispersion media and experimentally characterized using a differential phase shift keying (DPSK) decoder. DPSK bit-error rate data are in qualitative agreement with radio-frequency spectrum analyzer measurements. (C) 2008 Optical Society of America.