SPM effect on carrier-suppressed optical SSB transmission with NRZ and RZ formats

Tolerance to self-phase modulation (SPM) is evaluated in a dispersion-compensated transmission system using carriersuppressed optical single side-band (SSB) modulation, which employed a four-branched LiNbO/sub 3/ modulator and an ideal Hilbert transformer. Waveform degradation is dominated by the peak power of a Hilbert-transformed signal. RZ format is preferred to NRZ for optical SSB transmission.