Open AccessEFFECT OF NONLINEAR GAIN AND WAVEGUIDE STRUCTURE ON THE LINEWIDTH OF SEMICONDUCTOR LASERS
Author(s) -
Guo Chang-Zhi,
Yong-Zhen Huang
Publication year - 1989
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.38.699
Subject(s) - laser linewidth , semiconductor laser theory , optics , materials science , semiclassical physics , optoelectronics , laser , semiconductor , nonlinear system , physics , quantum well , quantum , quantum mechanics
The effect of nonlinear gain and waveguide structure on the modal linewidth broadening produced by with quantum phase noise in semiconductor lasers is inverstigated with semiclassical theory. It is shown that the modal linewidth depends not only on the linear gain but also on the third order nonlinear gain and the waveguide structure. Thus a new linewidth broadening enhancement factor and a new mechanism of the power-independent linewidth component are proposed.