High-resolution measurement and spectral overlap of cross-phase modulationinduced spectral broadening

Cross-phase modulation induced spectral broadening in WDM systems is measur ed using a high-resolution optical spectrum analyzer. The measured spectra are consistent with recently developed theoretical models. Using the theore tical models, the spectral overlap between two adjacent WDM channels is est imated for a typical 10-Gb/s system having 50 GHz of channel spacing. For - 20 dB overlap, the product of number of fiber spans and optical power per c hannel must be less than 18.1 and 15.5 dBm for standard and nonzero-dispers ion-shifted fiber, respectively.