Title :
Statistical properties of the spectrum of light pulses in fast pseudorandom word modulation of a single-mode semiconductor laser
Author :
Balle, S. ; Homar, M. ; Miguel, M. San
Author_Institution :
Dept. de Fis., Illes Balears Univ., Palma, Spain
fDate :
8/1/1995 12:00:00 AM
Abstract :
The spectrum of single-mode laser pulses generated by fast pseudorandom word modulation is studied numerically for return-to-zero and nonreturn-to-zero control signals. We analyze both statistics and the worst cases for the frequency chirp during each optical pulse, and we study the connection between these frequency chirps and the turn-on times. We show that patterns in the modulation signal sequences contribute to chirp noise. The worst case values of the turn-on time and the chirp range are very similar in the two modulation schemes, hence, the optimum choice depends mainly on the characteristics of the decision circuit and on the driver and detector bandwidths
Keywords :
chirp modulation; fluctuations; high-speed optical techniques; laser modes; laser noise; laser theory; optical communication equipment; optical modulation; semiconductor device noise; semiconductor lasers; sensitivity; spontaneous emission; statistical analysis; chirp noise; decision circuit; detector bandwidths; fast pseudorandom word modulation; frequency chirp; laser drivers; light pulse spectrum; modulation schemes; modulation signal sequences; nonreturn-to-zero control signals; optical communications light sources; optical pulse; return-to-zero control signals; single-mode laser pulse generation; single-mode semiconductor laser; statistical properties; statistics; turn-on times; Chirp modulation; Circuit noise; Frequency; Optical control; Optical noise; Optical pulse generation; Optical pulses; Pulse modulation; Signal generators; Statistical analysis;
Journal_Title :
Quantum Electronics, IEEE Journal of
