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Proceedings Paper

M-ary ASK coherent detection systems employing photonic amplifiers
Author(s): Fatima N. Farokhrooz; Hussain Arbab Tafti; J. P. Raina
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Paper Abstract

Coherent optical-fiber communication systems that are used in conjunction with multiple in- line optical amplifiers are very important for achieving point to point long distance communication as well as compensation of tap-losses in distribution networks. In this paper, the performance of in-line heterodyne synchronous detection type of coherent optical fiber communication systems for binary and M-ary ASK signaling schemes are investigated. This extends the previously published results on ASK asynchronous demodulation in the presence of optical amplifiers in cascade. The local oscillator spontaneous emission beat noise is the dominant source of noise in these systems. Expressions for bit error rate are derived and compared with the case where no amplifier is used. The results show that the value of optical amplifier input power significantly affects the system performance. Bit error floors are observed at about 10-9 for the total spontaneous emission parameter nsp equals 55 for binary synchronous ASK signal detection and nsp equals 20 and 8 for 4-ASK and 8- ASK signalling schemes when the amplifier input power is assumed to be -35 dBm at a bit rate of 1.2 Gb/sec.

Paper Details

Date Published: 28 April 1995
PDF: 8 pages
Proc. SPIE 2382, Laser Diodes and Applications, (28 April 1995); doi: 10.1117/12.208457
Show Author Affiliations
Fatima N. Farokhrooz, Indian Institute of Technology/Madras (India)
Hussain Arbab Tafti, Anna Univ. (India)
J. P. Raina, Indian Institute of Technology/Madras (India)

Published in SPIE Proceedings Vol. 2382:
Laser Diodes and Applications
Kurt J. Linden; Prasad R. Akkapeddi, Editor(s)

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