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Proceedings Paper

Demonstration of high pointing accuracy dual-axis collimation of 49 emitter diode bar using a laser-written custom phase-plate
Author(s): Natalia Trela; Howard J. Baker; Jozef J. Wendland; Denis R. Hall
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Paper Abstract

We present our work on a single optical component that combines fast-axis smile and lens error correction with slowaxis collimation, produced with a laser-cut phase-plate technique. Customized focal length of slow-axis lenses allows optimization of fill-factor of diode laser bars. In this paper we report on excellent beam properties obtained for a 49- single mode emitter array, 975 nm bar providing 30W cw output, with RMS pointing error of 3% and 6% of far-field divergence in fast- and slow-axis, respectively. We observed a pitch mismatch of 0.03% between the slow-axis lens array, with emitter pointing clearly affected by chip thermal expansion.

Paper Details

Date Published: 17 February 2010
PDF: 11 pages
Proc. SPIE 7583, High-Power Diode Laser Technology and Applications VIII, 75830Y (17 February 2010); doi: 10.1117/12.842197
Show Author Affiliations
Natalia Trela, Heriot-Watt Univ. (United Kingdom)
Howard J. Baker, Heriot-Watt Univ. (United Kingdom)
Jozef J. Wendland, PowerPhotonic, Ltd. (United Kingdom)
Denis R. Hall, Heriot-Watt Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 7583:
High-Power Diode Laser Technology and Applications VIII
Mark S. Zediker, Editor(s)

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