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Thermal management in 2.3-mu m semiconductor disk lasers : a finite element analysis

Kemp, A. and Hopkins, J.M. and MacLean, A.J. and Schulz, N. and Rattunde, M. and Wagner, J. and Burns, D. (2008) Thermal management in 2.3-mu m semiconductor disk lasers : a finite element analysis. IEEE Journal of Quantum Electronics, 44 (1-2). pp. 125-135. ISSN 0018-9197

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Abstract

Finite element analysis is used to study heat flow in a 2.3-mum semiconductor disk laser (or vertical-external-cavity surface-emitting laser) based on GalnAsSb-AlGaAsSb. An intra-cavity diamond heatspreader is shown to significantly improve thermal management-and hence power scalability-in this laser compared to the substrate thinning approach typically used in semiconductor disk lasers operating around 1 mum. The parameters affecting the performance of an intracavity heat-spreader are studied in the context of a 2.3-mum semiconductor disk laser: the thermal impedance at the interface between the semiconductor gain material and the heatspreader is found to be much more important than the mounting arrangements for the gain-heatspreader composite; power scaling with pump spot radius-increasing the pump power at constant pump intensity-is found to be intrinsically limited; and the pump wavelength is predicted to have less affect on thermal management than might be expected. Direct pumping of the quantum wells is found to significantly reduce the temperature rise per unit pump power.

Item type: Article
ID code: 17112
Keywords: diode-pumped solid-state lasers, semiconductor disk lasers, vertical-external-cavity surface-emitting lasers, VECSELs, III-V semiconductors, aluminium compounds, finite element analysis, gallium arsenide, gallium compounds, indium compounds, laser cavity resonators, microdisc lasers, optical pumping, semiconductor device packaging, semiconductor lasers, surface emitting lasers, thermal management, packaging, GaInAsSb-AlGaAsSb, intra-cavity diamond heatspreader, power scalability, power scaling, pump spot radius, quantum wells, semiconductor gain material, substrate thinning, thermal impedance, wavelength 2.3 mum, Optics. Light, Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering, Condensed Matter Physics
Subjects: Science > Physics > Optics. Light
Department: Faculty of Science > Institute of Photonics
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 07 Apr 2010 14:41
    Last modified: 28 Mar 2014 05:15
    URI: http://strathprints.strath.ac.uk/id/eprint/17112

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