Title :
An Improved Technique for Suppression of Intrachannel Four-Wave Mixing in 40-Gb/s Optical Transmission Systems
Author :
Batshon, Hussam G. ; Djordjevic, Ivan B. ; Vasic, Bane V.
Author_Institution :
Dept. of Electr. & Comput. Eng., Arizona Univ., Tucson, AZ
Abstract :
This letter presents an efficient method for testing the efficiency of modulation techniques for countering the effects of intrachannel four-wave mixing by calculating the sum of all the contributors at a given resonance position (the position affected by the surrounding pulses). In addition to this method, we are proposing a modulation technique that shows a significant Q-factor improvement of up to 7.5 dB (depending on the number of spans and the phase sequence implemented) over the uncoded return-to-zero on-off keying. Although the implementation of this phase modulation technique is simple, it is still very efficient in extending the nonlinearity tolerance and enhancing the performance of a high-speed optical transmission system
Keywords :
Q-factor; amplitude shift keying; multiwave mixing; optical fibre communication; optical modulation; phase modulation; 40 Gbit/s; Q-factor; high-speed optical transmission system; intrachannel four-wave mixing; modulation techniques; nonlinearity tolerance; optical transmission systems; phase modulation; return-to-zero on-off keying; Four-wave mixing; High speed optical techniques; Nonlinear optics; Optical mixing; Optical modulation; Optical pulses; Phase modulation; Pulse modulation; Resonance; Testing; Communication system nonlinearities; forward-error correction (FEC); low-density parity-check (LDPC) codes; modulation coding; optical Kerr effect; optical communications;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.889109
