Title :
Erbium-doped fiber amplifier cascade for multichannel coherent optical transmission
Author :
Walker, Graham R. ; Walker, Nigel G. ; Steele, Roger C. ; Creaner, Martin J. ; Brain, Mike C.
Author_Institution :
British Telecom Res. Labs., Ipswich, UK
fDate :
2/1/1991 12:00:00 AM
Abstract :
The requirements and practicalities of amplifier cascades for multichannel coherent transmission are discussed. A four-amplifier cascade which maintains an overall noise figure of less than 13 dB across a 20-nm optical bandwidth for total input powers up to -10 dBm is described. A potential capacity of 100 wavelength division multiplexing channels is demonstrated in a 300-km 622-Mb/s DPSK (differential phase shift keying) coherent transmission experiment
Keywords :
erbium; fibre lasers; frequency division multiplexing; optical communication equipment; optical links; optical modulation; phase shift keying; 300 km; 622 Mbit/s; DPSK; Er:fibre amplifier cascade; WDM channel capacity; differential phase shift keying; four-amplifier cascade; input powers; multichannel coherent optical transmission; optical bandwidth; overall noise figure; wavelength division multiplexing channels; Erbium-doped fiber amplifier; Optical amplifiers; Optical attenuators; Optical crosstalk; Optical fiber amplifiers; Optical saturation; Repeaters; Semiconductor optical amplifiers; Stimulated emission; Wavelength division multiplexing;
Journal_Title :
Lightwave Technology, Journal of
