Title :
Evaluation of filtering effects on optical BPSK systems using external cavity semiconductor lasers
Author :
Pires, Jãdo J O ; Rocha, José R Ferreira da
Author_Institution :
Dept. of Electr. & Comput. Eng., Inst. Superior Tecnico, Lisboa, Portugal
Abstract :
The performance of an optical BPSK (binary phase shift keying) heterodyne system using external-cavity semiconductor lasers and a squaring loop carrier recovery circuit is evaluated theoretically via an analytical method. The method is based on the Gram-Charlier series and takes into account the effect of filtering on the baseband signal disturbed by non-Lorentzian phase noise from external-cavity semiconductor lasers and additive Gaussian noise. It is found that the filter decreases the impact of laser phase noise, namely by reducing the degradation due to relaxation oscillations
Keywords :
electron device noise; filtering and prediction theory; optical communication equipment; optical modulation; phase shift keying; semiconductor junction lasers; BER; Gram-Charlier series; additive Gaussian noise; analytical method; binary phase shift keying; external cavity semiconductor lasers; filtering effects; heterodyne system; laser phase noise; nonLorentzian phase noise; optical BPSK systems; performance; squaring loop carrier recovery circuit; Binary phase shift keying; Circuits; Filtering; Laser noise; Laser theory; Optical filters; Optical mixing; Optical noise; Phase noise; Semiconductor lasers;
Conference_Titel :
Telecommunications Symposium, 1990. ITS '90 Symposium Record., SBT/IEEE International
Conference_Location :
Rio de Janeiro
DOI :
10.1109/ITS.1990.175566
