Carrier-Suppressed Return-to-Zero Pulse Generation Using Mode-Locked Lasers for 40-Gbit/s Transmission

Kenji SATO  Shoichiro KUWAHARA  Yutaka MIYAMOTO  Koichi MURATA  Hiroshi MIYAZAWA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E85-B   No.2   pp.410-415
Publication Date: 2002/02/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on 40 Gbit/s Optical Transmission Technologies)
Category: 
Keyword: 
semiconductor mode-locked laser,  phase inversion,  chirped grating,  high-speed transmission,  

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Summary: 
Phase-inversion between neighboring pulses appearing in carrier-suppressed return-to-zero pulses is effective in reducing the signal distortion due to chromatic dispersion and nonlinear effects. A generation method of the anti-phase pulses at 40 GHz is demonstrated by using semiconductor mode-locked lasers integrated with chirped gratings. Operation principle and pulse characteristics are described. Suppression of pulse distortion due to fiber dispersion is confirmed for generated anti-phase pulses. Repeaterless 150-km dispersion-shifted-fiber L-band transmission at 42.7 Gbit/s is demonstrated by using the pulse source.