Title :
Coherent transmission experiment over 2223 km at 2.5 Gbit/s using erbium-doped fibre amplifiers
Author :
Saito, Sakuyoshi ; Imai, Tetsuro ; Sugie, Toshiharu ; Ohkawa, Naoyoshi ; Ichihashi, Yasuyuki ; Ito, Takao
Author_Institution :
NTT Transmission Syst. Labs., Kanagawa, Japan
fDate :
5/1/1990 12:00:00 AM
Abstract :
A 2223 km transmission distance is achieved with a 2.5 Gbit/s FSK heterodyne detection system using erbium-doped-fibre in-line amplifiers and dispersion-shifted single-mode fibres. Twenty-five amplifiers placed at approximately 80 km intervals offer a total gain of more than 440 dB.
Keywords :
digital communication systems; frequency shift keying; optical fibres; optical links; repeaters; solid lasers; 2.5 Gbit/s; 2223 km; 440 dB; Er 3+ doped optical fibre; FSK; coherent transmission experiment; dispersion shifted fibres; fibre amplifiers; heterodyne detection system; optical fibre links; repeatered line; single-mode fibres; solid lasers;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19900438
