DocumentCode :
1547356
Title :
Amplified spontaneous emission model for quantum-well distributed feedback lasers
Author :
Makino, Toshihiko
Author_Institution :
Nortel Technol., Ottawa, Ont., Canada
Volume :
33
Issue :
6
fYear :
1997
fDate :
6/1/1997 12:00:00 AM
Firstpage :
1010
Lastpage :
1017
Abstract :
An amplified spontaneous emission model for quantum-well (QW) distributed feedback (DFB) lasers is presented, which takes into account local spontaneous emission, stimulated emission, and real refractive index change which are calculated from the Fermi-Dirac occupancy functions in a self-consistent manner. The local-normal-mode transfer-matrix method is used, which allows a coupling of the local DFB effect with the local QW spontaneous emission and gain. As an example, an analysis is given of a partly gain-coupled DFB laser with periodically etched QWs, which has a large discontinuity of spontaneous emission and gain in high- and low-corrugation regions. It is shown that the side-mode suppression improves with the increase of the number of etched QW´s, due to the carrier-density-dependent gain-coupling
Keywords :
carrier density; distributed feedback lasers; laser theory; optical couplers; quantum statistical mechanics; quantum well lasers; refractive index; semiconductor device models; spontaneous emission; stimulated emission; superradiance; Fermi-Dirac occupancy functions; QW DFB lasers; amplified spontaneous emission model; carrier-density-dependent gain-coupling; etched QW; local DFB effect; local QW spontaneous emission; local spontaneous emission; local-normal-mode transfer-matrix method; quantum-well distributed feedback lasers; real refractive index change; self-consistent manner; side-mode suppression; stimulated emission; Distributed feedback devices; Etching; Laser feedback; Laser modes; Laser transitions; Quantum well lasers; Quantum wells; Refractive index; Spontaneous emission; Stimulated emission;
fLanguage :
English
Journal_Title :
Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9197
Type :
jour
DOI :
10.1109/3.585489
Filename :
585489
Link To Document :
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