Title :
Effect of interfering echoes in a DPSK coherent optical transmission system with optical amplifiers
Author :
Walker, G.R. ; Steele, R.C. ; Walker, N.G.
Author_Institution :
British Telecom. Res. Labs., Martlesham Heath, Ipswich, UK
fDate :
8/1/1990 12:00:00 AM
Abstract :
Interfering echoes in semiconductor amplifier cascades can cause severe BER degradations in optical transmission systems. The authors describe an experimental investigation of the effect in a coherent system, and report results in good agreement with theoretical predictions. It is concluded that interfering echoes will severely limit the minimum interamplifier attenuation, which will in turn limit the number of semiconductor laser amplifiers than can be cascaded without optical isolation
Keywords :
optical communication equipment; optical links; phase shift keying; semiconductor junction lasers; BER degradations; DPSK coherent optical transmission system; interfering echoes; minimum interamplifier attenuation; optical amplifiers; semiconductor amplifier cascades; semiconductor laser amplifiers;
Journal_Title :
Optoelectronics, IEE Proceedings J
