Title :
Effect of span loss increase on the optically amplified communication system
Author :
Otani, Tomohiro ; Goto, Koji ; Kawazawa, Toshio ; Abe, Haruo ; Tanaka, Masando
Author_Institution :
KDD Submarine Cable Syst. Dept., Tokyo, Japan
fDate :
5/1/1997 12:00:00 AM
Abstract :
In optical fiber communication systems using Er3+ doped fiber amplifiers operating in their compression region, the optical signal power is known to be restored by the self-healing effect in the case of the span loss increase. In this paper, the influence of such excess loss on the system transmission performance is experimentally and numerically investigated from the point of view of the system signal-to-noise ratio and Q-factor. The results show that the system SNR is not completely recovered although the signal power is restored after several stages of amplifiers and that there exists the residual degradation of the system SNR. Through a 5.3 Gb/s data transmission experiment over 3000 km, the transmission penalty due to the excess span loss is confirmed to be decided by this residual degradation of the system SNR. The obtained results can be used for system design and a plan of maintenance for the optical amplifier communication system
Keywords :
fibre lasers; optical fibre communication; optical fibre losses; optical noise; optical repeaters; 3000 km; 5.3 Gbit/s; Er3+ doped fiber amplifiers; Q-factor; amplifier stages; compression region; excess loss; optical fiber communication systems; optical signal power; optically amplified communication system; plan of maintenance; residual degradation; self-healing effect; signal power; signal-to-noise ratio; span loss increase; system SNR; system transmission performance; transmission penalty; Degradation; Doped fiber amplifiers; Erbium; Optical amplifiers; Optical fiber communication; Optical losses; Power system restoration; Propagation losses; Signal restoration; Stimulated emission;
Journal_Title :
Lightwave Technology, Journal of
