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

Volume

27

Issue

17

fYear

2009

Firstpage

3765

Lastpage

3772

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;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2008.2005553

Filename

4814687