40 Gbit/s Transmission with All-Optical 3R Regeneration Using Two-Stage SOA-Based Polarization Discriminated Switch with Assist Light Injection

Ryo INOHARA  Kohsuke NISHIMURA  Munefumi TSURUSAWA  Masashi USAMI  Shigeyuki AKIBA  

IEICE TRANSACTIONS on Electronics   Vol.E87-C   No.7   pp.1106-1113
Publication Date: 2004/07/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Ultrafast Photonics)
all-optical regeneration,  wavelength conversion,  semiconductor optical amplifier,  all-optical signal processing,  optical 3R,  

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All optical regenerations or wavelength conversions using SOA-based polarization discriminated switch injected by an assist light were investigated. First of all, cross gain modulation (XGM) and cross phase modulation (XPM) in a SOA injected by an external assist light were quantitatively analyzed. A simple measurement technique of XGM and XPM was shown to confirm that the injection of assist light could reduce a gain recovery time with some sacrifice for XGM and XPM efficiency. All-optical 3R regeneration using two-stage SOA-based polarization discriminated switch at 40 Gbit/s and its tolerances for some degradation against intensity deviation and optical signal-to-noise ratio (OSNR) were also shown. Finally, regeneration capability was evaluated through a dispersion shifted fiber (DSF)-based re-circulating loop transmission experiment. Those results indicate that the SOA-based polarization discriminated switch is a promising candidate for all-optical regenerator from the practical point of view.