Demonstration of high pointing accuracy dual-axis collimation of 49 emitter diode bar using a laser-written custom phase-plate

Natalia Trela; Howard J. Baker; Jozef J. Wendland; Denis R. Hall

doi:10.1117/12.842197

17 February 2010 Demonstration of high pointing accuracy dual-axis collimation of 49 emitter diode bar using a laser-written custom phase-plate

Natalia Trela, Howard J. Baker, Jozef J. Wendland, Denis R. Hall

Author Affiliations +

Proceedings Volume 7583, High-Power Diode Laser Technology and Applications VIII; 75830Y (2010) https://doi.org/10.1117/12.842197
Event: SPIE LASE, 2010, San Francisco, California, United States

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.

Citation Download Citation

Natalia Trela, Howard J. Baker, Jozef J. Wendland, and Denis R. Hall "Demonstration of high pointing accuracy dual-axis collimation of 49 emitter diode bar using a laser-written custom phase-plate", Proc. SPIE 7583, High-Power Diode Laser Technology and Applications VIII, 75830Y (17 February 2010); https://doi.org/10.1117/12.842197

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