Title :
WDM upgrading of an installed submarine optical amplifier system
Author :
Murakami, M. ; Matsuda, T. ; Maeda, H. ; Tada, Y. ; Imai, T.
Author_Institution :
NTT Network Service Syst. Labs., Kanagawa, Japan
fDate :
11/1/2001 12:00:00 AM
Abstract :
This paper describes the WDM upgrading of a submarine optical amplifier system installed for single-channel transmission in commercial use. The key technologies used include 10-Gb/s high-speed forward error correction, preemphasis to overcome the optical passband-width constraint, optimized signal pulse format that leads to partial return-to-zero (PRZ) signaling, and dispersion compensation to suppress the degradation caused by fiber nonlinearity and dispersion. It also reports field experimental results on upgraded system performance. The results confirm that simply upgrading the terminal equipment allows the transmission capacity of a submersed line consisting of submarine repeaters and cables to be flexibly increased from 10 Gb/s to 40 Gb/s per fiber pair
Keywords :
error correction; optical cables; optical fibre amplifiers; optical fibre dispersion; optical repeaters; submarine cables; wavelength division multiplexing; 10 to 40 Gbit/s; WDM upgrading; commercial use; degradation; dispersion compensation; fiber dispersion; fiber nonlinearity; high-speed forward error correction; installed submarine optical amplifier system; optical passband-width constraint; optimized signal pulse format; partial return-to-zero signaling; preemphasis; single-channel transmission; submarine cables; submarine repeaters; submersed line; terminal equipment; transmission capacity; High speed optical techniques; Marine technology; Optical amplifiers; Optical fiber cables; Optical fiber devices; Pulse amplifiers; Semiconductor optical amplifiers; Stimulated emission; Underwater vehicles; Wavelength division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
