Linewidth enhancement for DFB lasers due to longitudinal field dependence in the laser cavity

2 July 1987

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

Vol. 23 (14) , 715-717
https://doi.org/10.1049/el:19870508

Abstract

To calculate the linewidth for an index-guided semiconductor laser, one usually neglects a correction factor for the spontaneous emission rate, which is introduced by the longitudinal field distribution within the laser cavity. For FabryPerot lasers with cleaved facets the correction factor is small. However, for DFB lasers this correction factor may become quite significant, yielding a linewidth enhancement for DFB laser diodes.

Keywords

LONGITUDINAL FIELD DEPENDENCE
LASER CAVITY
SEMICONDUCTOR LASER
FABRY-PEROT LASERS
CORRECTION FACTOR
SPONTANEOUS EMISSION RATE
DFB LASERS
LINEWIDTH ENHANCEMENT

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