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Proceedings Paper

Modeling and experimental result analysis for high-power VECSELs
Author(s): Aramais R. Zakharian; Joerg Hader; Jerome V. Moloney; Stephan W. Koch; Stephan Lutgen; Peter Brick; Tony Albrecht; Stefan Grotsch; Johann Luft; Werner Spath
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Paper Abstract

We present a comparison of experimental and microscopically based model results for optically pumped vertical external cavity surface emitting semiconductor lasers. The quantum well gain model is based on a quantitative ab-initio approach that allows calculation of a complex material susceptibility dependence on the wavelength, carrier density and lattice temperature. The gain model is coupled to the macroscopic thermal transport, spatially resolved in both the radial and longitudinal directions, with temperature and carrier density dependent pump absorption. The radial distribution of the refractive index and gain due to temperature variation are computed. Thermal managment issues, highlighted by the experimental data, are discussed. Experimental results indicate a critical dependence of the input power, at which thermal roll-over occurs, on the thermal resistance of the device. This requires minimization of the substrate thickness and optimization of the design and placement of the heatsink. Dependence of the model results on the radiative and non-radiative carrier recombination lifetimes and cavity losses are evaluated.

Paper Details

Date Published: 19 June 2003
PDF: 7 pages
Proc. SPIE 4993, High-Power Fiber and Semiconductor Lasers, (19 June 2003); doi: 10.1117/12.479503
Show Author Affiliations
Aramais R. Zakharian, Univ. of Arizona (United States)
Joerg Hader, Univ. of Arizona (United States)
Jerome V. Moloney, Univ. of Arizona (United States)
Stephan W. Koch, Philipps-Univ. Marburg (Germany)
Stephan Lutgen, OSRAM Opto Semiconductors GmbH (Germany)
Peter Brick, OSRAM Opto Semiconductors GmbH (Germany)
Tony Albrecht, OSRAM Opto Semiconductors GmbH (Germany)
Stefan Grotsch, OSRAM Opto Semiconductors GmbH (Germany)
Johann Luft, OSRAM Opto Semiconductors GmbH (Germany)
Werner Spath, OSRAM Opto Semiconductors GmbH (Germany)

Published in SPIE Proceedings Vol. 4993:
High-Power Fiber and Semiconductor Lasers
Mahmoud Fallahi; Jerome V. Moloney, Editor(s)

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