Title :
Sensitivity improvement of a 2 Gb/s quadrature phase shift keyed subcarrier multiplexed system by use of an optical preamplifier
Author :
Joyce, G.R. ; Hill, P. ; Olshansky, R.
Author_Institution :
GTE Lab. Inc., Waltham, MA, USA
fDate :
4/1/1990 12:00:00 AM
Abstract :
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.<>
Keywords :
laser beam applications; multiplexing; optical communication equipment; optical modulation; phase shift keying; preamplifiers; receivers; sensitivity; 1 Gbit/s; 1509 nm; 2 Gbit/s; 5 GHz; bit error rates; data signals; distributed feedback laser; intensity-modulated signal; optical preamplifier; quadrature phase shift keyed subcarrier multiplexed system; received power; receiver preamplifier; sensitivity improvement; subcarrier; system noise sources; traveling wave semiconductor optical amplifier; Distributed feedback devices; Laser feedback; Laser noise; Laser theory; Optical noise; Optical receivers; Preamplifiers; Semiconductor device noise; Semiconductor lasers; Semiconductor optical amplifiers;
Journal_Title :
Photonics Technology Letters, IEEE
