Spontaneous emission rate of gain-coupled DFB lasers: loss grating against gain grating

2 July 1992

journal article
Published by Institution of Engineering and Technology (IET) in Electronics Letters

Vol. 28 (14) , 1347-1349
https://doi.org/10.1049/el:19920855

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

HIGH SIDEMODE SUPPRESSION RATIO
SEMICONDUCTOR LASERS
LOSS GRATING
NARROW LINEWIDTH
NOISE SOURCE DISTRIBUTION
SPONTANEOUS EMISSION RATE
GAIN GRATING
GAIN-COUPLED DFB LASERS

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