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Field Trial of All-Optical 2R Regeneration in 40-Gbit/s WDM Transmission Systems with Optical Add/Drop Multiplexing
Shuichi SATOMI Mikio YAGI Shiro RYU Shoichiro ASANO
IEICE TRANSACTIONS on Communications
Publication Date: 2005/05/01
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Joint Special Section on Recent Progress in Optoelectronics and Communications)
field trial, all-optical 2R regeneration, electro-absorption modulator, optical add/drop multiplexing,
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Optical signal processing is one of essential technologies for improving the flexibility of all-optical network. Above all, recently there have been a lot of studies regarding all-optical 2R/3R regeneration technology. However, there are few studies about all-optical 2R/3R technologies that are carried out in field environment. In this paper, we report the successful results of field trials of an all-optical 2R regeneration system based on an electro-absorption modulator for 40-Gbit/s WDM transmission systems with optical add/drop multiplexing. It was made sure that by applying the all-optical 2R regeneration system to the optical add/drop multiplexer in the 320-km-long transmission systems the transmission characteristics of the express signal after 320-km transmission and those of the dropped signal at 160-km can be made nearly the same. It is quite important that the transmission characteristics are equal for both the dropped and express channel from a point of view of the system design, and the results in this paper suggests one possible solution for this matter.