Title :
Spontaneous emission rate of gain-coupled DFB lasers: loss grating against gain grating
fDate :
7/2/1992 12:00:00 AM
Abstract :
For gain-coupled DFB lasers with a gain grating an additional term has to be considered for the spontaneous emission rate, taking into account that the noise source distribution is modulated with the grating period. The basic advantages of a loss-grating as compared with a gain-grating device are narrow linewidth in combination with a high sidemode suppression ratio.
Keywords :
diffraction gratings; distributed feedback lasers; electron device noise; laser theory; semiconductor junction lasers; spectral line breadth; superradiance; gain grating; gain-coupled DFB lasers; high sidemode suppression ratio; loss grating; narrow linewidth; noise source distribution; semiconductor lasers; spontaneous emission rate;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19920855
