Title :
Reduction of dynamic linewidth in single-frequency semiconductor lasers
Author :
Olshansky, R. ; Fye, D.
Author_Institution :
GTE Laboratories Incorporated, Optoelectronic Devices Department, Waltham, USA
Abstract :
Carrier density oscillations and frequency chirping of pulse code modulated single frequency semiconductor lasers are shown to be greatly reduced by use of a small current step in the leading edge of the drive pulse. For a 100 km single mode fibre link the dispersion power penalty at 1.55 ¿m resulting from dynamic line broadening is predicted to be reduced from 3.7 to 1.0 dB by use of the modified current pulse.
Keywords :
carrier density; laser modes; semiconductor junction lasers; spectral line breadth; PCM; carrier density oscillations; dispersion power; drive pulse; dynamic linewidth; frequency chirping; modified current pulse; single mode fibre link; single-frequency semiconductor lasers; small current step;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19840631
