DocumentCode :
1048311
Title :
Modeling thermal effects on the light vs. current characteristic of gain-guided vertical-cavity surface-emitting lasers
Author :
Piprek, J. ; Wenzel, H. ; Sztefka, G.
Author_Institution :
Fachbereich Phys., Humboldt-Univ., Berlin, Germany
Volume :
6
Issue :
2
fYear :
1994
Firstpage :
139
Lastpage :
142
Abstract :
Heating effects on the light power vs. current characteristic of planar top-emitting vertical-cavity laser diodes are analyzed by thermal, optical and electrical modeling. The two-dimensional finite element thermal-electrical simulation considers the spatial current funneling in the top p-doped distributed Bragg reflector and a current density dependent resistivity of the hetero-barrier. Layered regions are described by anisotropic material parameters. Non-uniform refractive index temperature coefficients of the semiconductor materials are applied in the vertical optical modeling. The strongly inhomogeneous temperature distribution causes thermal increases of emission wavelength and reflectivity as well as decreases of threshold gain and external quantum efficiency with rising current. Finally, the calculated maximum light power is found to be decisively affected by the temperature coefficients of the refractive indices.<>
Keywords :
distributed Bragg reflector lasers; finite element analysis; laser cavity resonators; laser theory; reflectivity; refractive index; semiconductor device models; semiconductor lasers; temperature distribution; InGaAs-GaAs; anisotropic material parameters; current density; current funneling; electrical modeling; emission wavelength; external quantum efficiency; gain-guided vertical-cavity surface-emitting lasers; heating; hetero-barrier resistivity; inhomogeneous temperature distribution; layered regions; light power current characteristic; optical modeling; p-doped distributed Bragg reflector; planar top-emitting laser diodes; reflectivity; refractive index temperature coefficients; semiconductor materials; thermal modeling; threshold gain; two-dimensional finite element simulation; Current density; Diode lasers; Distributed Bragg reflectors; Finite element methods; Geometrical optics; Heating; Optical refraction; Optical variables control; Temperature; Thermal resistance;
fLanguage :
English
Journal_Title :
Photonics Technology Letters, IEEE
Publisher :
ieee
ISSN :
1041-1135
Type :
jour
DOI :
10.1109/68.275409
Filename :
275409
Link To Document :
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