Emulation of the operation and degradation of high-power laser bars using simulation tools
S. Bull1, J.J. Lim1, C.K. Amuzuvi1, J.W. Tomm2, J. Nagle3, B. Sumpf4, G. Erbert4, N. Michel5, M. Krakowski5 and E.C. Larkins1
Published in:
Semicond. Sci. Technol., vol. 27, no. 094012 (2012).
Abstract:
We report on the simulation of high-power laser bars and the emulation of their ageing behaviour, using simulation tools originally developed for single emitter laser diodes. Simulations of a simplified bar indicated that the hotter emitters located at the centre of the bar emit more power than their cooler neighbours, while degradation emulations showed that the centre emitters degrade faster. Although the degraded emitters produced less light, they drew an increasingly large fraction of the total current. These insights into the operation and degradation of the bar motivated new experimental investigations, which confirmed the predicted behaviour.
1 Electrical Systems and Optics Research Division, University of Nottingham, Nottingham NG7 2RD, UK
2 Max-Born-Institut, Max-Born-Str 2A, D-12489 Berlin, Germany
3 Thales Research and Technology, Route D´epartementale 128, F-91767 Palaiseau Cedex, France
4 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, D-12489 Berlin, Germany
5 Alcatel-Thales III-V Lab, Route D´epartementale 128, F-91767 Palaiseau Cedex, France
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