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Proceedings Paper

Modeling light versus current characteristics of long-wavelength VCSELs with various DBR materials
Author(s): Joachim Piprek; Hans Wenzel; Hans-Juergen Wuensche; D. Braun; Fritz Henneberger
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Paper Abstract

Long-wavelength vertical-cavity surface-emitting lasers are investigated using electro-thermal, optical, and electronic modeling. The strain-compensated InGaAsP multi-quantum-well active region of the device example is vertically sandwiched between various distributed Bragg reflectors (DBRs). InP/InGaAsP, Si/SiO2, and GaAs/AlAs mirrors are considered as well as novel combinations like SiC/MgO. The model includes nonuniform current injection, distributed heat sources, temperature dependent material properties, and k(DOT)p band structure calculations. Device parameters such as thermal resistance, threshold current, and external quantum efficiency are compared and heating effects are evaluated. Simulated light power versus current characteristics exhibit the typical thermal roll-over in continuous wave operation. The complex influence of the DBR materials is analyzed in detail.

Paper Details

Date Published: 19 June 1995
PDF: 12 pages
Proc. SPIE 2399, Physics and Simulation of Optoelectronic Devices III, (19 June 1995);
Show Author Affiliations
Joachim Piprek, Univ. of Delaware (United States)
Hans Wenzel, Ferdinand-Braun-Institut fuer Hoechstfrequenztechnik (Germany)
Hans-Juergen Wuensche, Humboldt-Univ. (Germany)
D. Braun, Humboldt-Univ. (Germany)
Fritz Henneberger, Humboldt-Univ. (Germany)

Published in SPIE Proceedings Vol. 2399:
Physics and Simulation of Optoelectronic Devices III
Marek Osinski; Weng W. Chow, Editor(s)

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