Title :
Frequency chirp reduction in a 2.2 Gbit/s directly modulated InGaAsP semiconductor laser by CW injection
Author :
Lin, Chong ; Andersen, J.K. ; Mengel, F.
Author_Institution :
Technical University of Denmark, Electromagnetics Institute, Lyngby, Denmark
Abstract :
Longitudinal-mode linewidth broadening due to frequency chirping in a high-speed modulated InGaAsP laser transmitter is reduced by CW injection of a master laser with a matched longitudinal mode. Biased below threshold and modulated with RZ format 2.2 Gbit/s current pulses, the transmitter laser´s frequency chirp can be reduced at the expense of a small pulsewidth increase and on/off ratio reduction.
Keywords :
III-V semiconductors; gallium arsenide; gallium compounds; indium compounds; laser modes; optical modulation; semiconductor junction lasers; 2.2 Gbit/s current pulses; CW injection; directly modulated InGaAsP semiconductor laser; frequency chirp reduction; longitudinal mode linewidth broadening; matched longitudinal mode; on/off ratio reduction; pulsewidth increase;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19850055
