Title :
Suppression of interferometric noise in externally modulated lightwave AM-CATV systems by phase modulation
Author_Institution :
AT&T Network Syst. Nederland B.V., Huizen, Netherlands
Abstract :
Multiple discrete reflections and Rayleigh scattering in a fibre network cause interferometric intensity noise, which degrades the carrier to noise ratio in AM-CATV systems, depending on the laser linewidth and length of the fibre section. This noise can be suppressed by up to 10dB if single tone phase modulation of the optical signal is applied.
Keywords :
amplitude modulation; community antenna television; interference suppression; light interferometry; optical fibres; optical links; optical modulation; Rayleigh scattering; carrier to noise ratio; externally modulated lightwave AM-CATV systems; fibre network; intensity noise; interferometric noise; laser linewidth; multiple discrete reflections; optical signal; single tone phase modulation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19931377
