Title :
Adaptive Pulse Shaping Through BER Feedback
Author :
Webb, Steve M. ; Ellison, John G. ; Desbruslais, Stephen R. ; Fedoruk, Mikhail P. ; Turitsyn, Sergei K.
Author_Institution :
Xtera Commun., Romford, UK
Abstract :
In this paper, we propose a simplified approach to optical signal predistortion based on adaptive pulse shaping through asymmetrical control of a Mach-Zehnder modulator above its switching voltage. The scheme allows natural tailoring of transmitted pulses by optimizing the received pulse. We demonstrate enhancement of the power tolerance in nonrepeated systems and improved OSNR/BER performance and dispersion tolerance in ultra-long-haul fiber systems operating at 10 Gb/s and 20 Gb/s channel rates. The improved performance is demonstrated through simulations and experiment.
Keywords :
Mach-Zehnder interferometers; electro-optical modulation; error statistics; optical communication equipment; optical distortion; optical feedback; optical fibre communication; optical pulse shaping; BER feedback; Mach-Zehnder modulator; OSNR; adaptive pulse shaping; bit rate 10 Gbit/s; bit rate 20 Gbit/s; optical signal predistortion; power tolerance; ultra-long-haul fiber systems; Adaptive pulse shaping; BER feedback; fiber optics; signal preprocessing; transmission;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2008.2005553
