Title :
Effect of Mach-Zehnder modulator DC extinction ratio on residual chirp-induced dispersion in 10-Gb/s binary and AM-PSK duobinary lightwave systems
Author :
Walklin, Sheldon ; Conradi, Jan
Author_Institution :
TRLabs, Edmonton, Alta., Canada
Abstract :
It is shown through numerical simulation that residual frequency chirping in lithium niobate external modulators, which accompanies devices with a finite-optical extinction ratio, always degrades the performance of lightwave systems that use optical AM-PSK duobinary signaling. This is unlike binary systems which will exhibit either an improvement or degradation, depending on the polarity of residual chirp.
Keywords :
amplitude modulation; chirp modulation; electro-optical modulation; optical fibre dispersion; phase shift keying; telecommunication signalling; 10 Gbit/s; AM-PSK duobinary lightwave systems; Gb/s binary lightwave systems; Mach-Zehnder modulator DC extinction ratio; finite-optical extinction ratio; lithium niobate external modulators; numerical simulation; residual chirp polarity; residual chirp-induced dispersion; residual frequency chirping; Chirp modulation; Dispersion; Extinction ratio; Fiber nonlinear optics; Frequency; Nonlinear optics; Optical modulation; Optical receivers; Optical sensors; Optical transmitters;
Journal_Title :
Photonics Technology Letters, IEEE
