Novel Optical-Regenerator Using Electroabsorption Modulators

Tetsuya MIYAZAKI
Tomohiro OTANI
Noboru EDAGAWA
Masatoshi SUZUKI
Shu YAMAMOTO

Publication
IEICE TRANSACTIONS on Communications   Vol.E82-B    No.8    pp.1148-1153
Publication Date: 1999/08/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Joint Special Issue on Recent Progress in Optoelectronics and Communications)
Category: Optical Systems and Technologies
Keyword: 
optical regenerator,  electroabsorption modulators,  wavelength conversion,  

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Summary: 
We have proposed and demonstrated a novel optical regenerator architecture employing electroabsorption modulators as wavelength converters. The employment of EA modulators is advantageous for high-speed operation and flexibility in the bit-rate for the pulse regeneration. In addition, the EA modulator-wavelength-converter acts also as a photo diode for clock extraction. Compensation of the optical SNR and Q-factor has been demonstrated, even in cascaded noise load. Furthermore, against dispersion loading, we have confirmed that waveform recovery and Q-factor improvement is obtained by midway insertion of the optical regenerator. The proposed architecture will offer a wide-band-electronics-free optical regenerator in multi-tens of gigabit per second WDM networks.