SPECTRAL FILTERING AND DISPERSION PENALTIES ASSOCIATED WITH BROAD-BAND SOURCES IN DIGITAL BROADCAST VIDEO DELIVERY

Broadcast digital video with QPSK modulation has been delivered over W DM passive optical networks by using spectral slicing of broad-band so urces such as LED's, We compare a model for, and experimental measurem ents of, dispersion induced impairments in QPSK video transmission sys tems with broadband optical carriers, The model is a universal functio n of RF frequencies, PON fiber length, and source spectral width for a ny given spectral shape, and describes the functional form and major p ortion of the observed impairments, The system implications of spectra l filtering for unamplified systems are also discussed.