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Proceedings Paper

Compact illumination modules based on high-power VCSEL arrays
Author(s): Christiane Gimkiewicz; Michael Columbus; Michael Moser
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Paper Abstract

Multi-mode VCSEL arrays are candidates for compact illumination modules with applications as flash light illumination for the detailed imaging of fast moving objects (> 100 m/s) or for time-of-flight cameras with modulation frequency in the > 10 MHz domain. Rise and fall times have to be as short as a few nanoseconds, while the optical output power has to be in the order of one Watt. In this paper we investigate, for multi-mode VCSEL arrays, the dependency of the far-field pattern on the drive current and on the distance to a reflecting surface. We demonstrate that, with the help of diffusing elements, the current dependency of the far-field pattern can be reduced. We have realized an illumination unit with modulation frequencies of up to 80 MHz and an optical output of 1 Watt.

Paper Details

Date Published: 8 May 2008
PDF: 10 pages
Proc. SPIE 6997, Semiconductor Lasers and Laser Dynamics III, 69971I (8 May 2008); doi: 10.1117/12.780231
Show Author Affiliations
Christiane Gimkiewicz, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)
Michael Columbus, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)
Michael Moser, Bookham, Inc. (Switzerland)


Published in SPIE Proceedings Vol. 6997:
Semiconductor Lasers and Laser Dynamics III
Krassimir P. Panajotov; Marc Sciamanna; Angel A. Valle; Rainer Michalzik, Editor(s)

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