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Calculation of bit error rate in DPSK system with interfering echoes from optical amplifier chain

	Electronics Letters 25 (1989), Nr.14, S.902-4 ISSN: 0013-5194

	Englisch
	Zeitschriftenaufsatz
	Fraunhofer HHI ()
	errors; information theory; optical communication; optical communication equipment; phase shift keying; semiconductor junction lasers; ber calculation; dpsk system; interfering echoes; optical amplifier chain; bit error rate degradation; optical dpsk-heterodyne transmission system; maximal allowable facet reflectivity; number of in-line optical amplifiers

Abstract
The bit error rate degradation due to echoes caused by cascaded nearly travelling wave amplifiers in an optical DPSK-heterodyne transmission system is calculated. Using these results, an estimate is derived for the maximal allowable facet reflectivity in dependence of the number of in-line optical amplifiers.