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Sensitivity improvement of a 2 Gb/s quadrature phase shift keyed subcarrier multiplexed system by use of an optical preamplifier

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3 Author(s)
Joyce, G.R. ; GTE Lab. Inc., Waltham, MA, USA ; Hill, P. ; Olshansky, R.

A traveling wave semiconductor optical amplifier is used as a receiver preamplifier in a quadrature-phase-shift-keyed subcarrier multiplexed system. The intensity-modulated signal from a 1509-m distributed feedback laser bears two 1-Gb/s data signals on a 5-GHz subcarrier. The receiver preamplifier yields a 9.2-dB sensitivity improvement to -29.2 dBm. The system noise sources are measured. Theoretical and measured bit error rates versus received power are presented.<>

Published in:

Photonics Technology Letters, IEEE  (Volume:2 ,  Issue: 4 )