Title :
Large-signal effective alpha factor of complex-coupled DFB semiconductor lasers
Author :
Lowery, Arthur J.
Author_Institution :
Dept. of Electr. & Electron. Eng., Melbourne Univ., Parkville, Vic., Australia
Abstract :
DFB lasers with complex (gain and index) coupling have been proposed as low-chirp devices because of a reduction in an effective alpha factor (linewidth enhancement factor) calculated using a small-signal analysis. The article represents comprehensive numerical simulations showing that there is a corresponding reduction in the large-signal effective alpha factor, calculated from the time-bandwidth product of transient optical pulses, and a significant effect on the transient response.
Keywords :
distributed feedback lasers; laser modes; semiconductor lasers; transient response; complex-coupled DFB semiconductor lasers; effective alpha factor; gain coupling; index coupling; linewidth enhancement factor; low-chirp devices; small-signal analysis; time-bandwidth product; transient optical pulses; transient response;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19921477
