Open AccessEFFECTS OF DISPERSIVE RELATION AND LONGITUDINALLY COUPLED CAVITY (C3) ON THE MODE SPECTRAL BEHAVIOR IN SEMICONDUCTOR LASERS
Author(s) -
Chunyu Guo,
Yong-Zhen Huang
Publication year - 1990
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.39.1739
Subject(s) - laser linewidth , semiconductor laser theory , materials science , laser , optics , longitudinal mode , semiconductor , homogeneous broadening , optoelectronics , spectral line , physics , doppler broadening , astronomy
The effect of the dispersive relation is investigated theoretically and a nominal linewidth broadening enhancement factor αe and an F factor related to the dispersive relation are introduced to modify the spectral linewidth formula of semiconductor lasers. It is found that the spectral linewidth not only can be suppressed by decreasing the linewidth broadening en-hancement factor, but also can be suppressed further by increasing the F factor. The mechanisms of the mode selection and linewidth compression in longitudinally coupled cavity (C3) are analyzed by means of the proposed effective reflectivity method, and the optimum condition for realizing single longitudinal mode with narrow linewidth is noted.