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All-optical regeneration of DQPSK/QPSK signals based on phase-sensitive amplification

✍ Scribed by Zheng Zheng; Lin An; Zheng Li; Xin Zhao; Xiang Liu

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
328 KB
Volume
281
Category
Article
ISSN
0030-4018

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✦ Synopsis

An all-optical regeneration scheme for DQPSK and QPSK signals using phase-sensitive amplifiers (PSAs) is studied and its effectiveness is investigated through numerical simulations. By leveraging the ability of PSAs to provide phase and amplitude regenerative amplification, we show significant simultaneous suppression of both phase and amplitude noises of (D)QPSK signals under optimized conditions. The reduction in the phase noise variance of a noise-corrupted DQPSK signal obtained by one such regenerative amplification can be as large as $5.5 folds, showing its good potential for distributed optical regeneration of (D)QPSK signals.

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## Abstract All‐optical 2R regeneration of 10 Gb/s signals based on self‐phase modulation (SPM) in an 80‐m dispersion‐flattened microstructure fiber was demonstrated experimentally. The SPM‐induced broadened spectrum was generated in bandwidth of 70 nm with the flatness of −3 dB in the 1550 nm band