Title :
Optical SNR enhanced amplification in long-distance recirculating-loop WDM transmission experiment using 1580 nm band hybrid amplifier
Author :
Masuda, H. ; Kawai, S. ; Suzuki, K.I.
Author_Institution :
NTT Opt. Network Syst. Lab., Kanagawa, Japan
fDate :
3/4/1999 12:00:00 AM
Abstract :
A finely gain-flattened wideband hybrid amplifier for a 120 km transmission fibre span with a significantly enhanced optical signal-to-noise ratio (OSNR) is realised using a distributed Raman amplifier, a 1580 nm erbium-doped fibre amplifier (EDFA), and a gain equaliser. The amplifier yields a 5.4 dB improvement in OSNR and 3.7 times (5.6 dB) improvement in average transmission distance (from 570 to 2088 km) compared to a lumped EDFA
Keywords :
Raman lasers; equalisers; optical communication equipment; optical fibre amplifiers; optical fibre networks; wavelength division multiplexing; wideband amplifiers; 120 km; 1580 nm; 2088 km; Er3+-doped fibre amplifier; average transmission distance; distributed Raman amplifier; finely gain-flattened wideband hybrid amplifier; gain equaliser; long-distance recirculating-loop WDM transmission experiment; optical SNR enhanced amplification;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19990273
