Title :
Low-Complexity Compensation of SOA Nonlinearity for Single-Channel PSK and OOK
Author :
Vacondio, Francesco ; Ghazisaeidi, Amirhossein ; Bononi, Alberto ; Rusch, Leslie Ann
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. Laval, Quebec City, QC, Canada
Abstract :
Carrier density fluctuations in semiconductor optical amplifiers (SOAs) impose penalties on phase-shift keying (PSK) signals due to nonlinear phase noise (NLPN), and on-off keying (OOK) signals due to self-gain modulation. In this paper, we propose a simple scheme to equalize the impairments induced by SOA nonlinearities, derived from the small signal analysis of carrier density fluctuations. We demonstrate via simulation almost complete cancelation of the NLPN added by a saturated SOA on a differential PSK signal. We demonstrate via both simulations and experiment the effectiveness of the method for mitigation of nonlinear distortions imposed by SOAs on an OOK signal.
Keywords :
amplitude shift keying; carrier density; differential phase shift keying; optical communication equipment; optical distortion; optical saturation; phase noise; semiconductor optical amplifiers; SOA nonlinearity; carrier density fluctuations; differential PSK signal; low-complexity compensation; nonlinear distortions; nonlinear phase noise; on-off keying; phase-shift keying; saturated SOA; self-gain modulation; semiconductor optical amplifiers; small signal analysis;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2009.2036868
