Title :
Influence of (semiconductor) laser linewidth on the error-rate floor in dual-filter optical FSK receivers
Author :
Garrett, I. ; Jacobsen, G.
Author_Institution :
British Telecom Research Laboratories, Ipswich, UK
Abstract :
We discuss an error-rate floor in dual-filter optical FSK receivers in terms of the IF linewidth and the frequency shift between 0s and 1s, using a comprehensive model for the receiver which takes into account nonzero laser linewidth, noise correlation and signal overlap between the filters. We present calculated results for total error probability in terms of signal power, IF linewidth and frequency shift, illustrating the effect of the floor on receiver sensitivity, and we contrast it with a related effect in heterodyne ASK systems.
Keywords :
error statistics; frequency shift keying; optical communication equipment; receivers; semiconductor junction lasers; IF linewidth; dual-filter optical FSK receivers; error-rate floor; filter signal overlap; frequency shift; noise correlation; optical communication; receiver sensitivity; semiconductor laser linewidth; signal power; total error probability;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19850201
