High-power-class QCW red laser bars and stacks for pump and direct application

M. Niemeyer; D. Martin; J. Pohl; M. Weyers; A. Knigge; P. Crump; H. Kissel; J. Biesenbach

doi:10.1117/12.2509895

11 March 2019 High-power-class QCW red laser bars and stacks for pump and direct application

M. Niemeyer, D. Martin, J. Pohl, M. Weyers, A. Knigge, P. Crump, H. Kissel, J. Biesenbach

Proceedings Volume 10900, High-Power Diode Laser Technology XVII; 1090009 (2019) https://doi.org/10.1117/12.2509895
Event: SPIE LASE, 2019, San Francisco, California, United States

Abstract

We present an overview of collaborative research between FBH (diode lasers) and Coherent|Dilas (packaging) to enable applications using red diode lasers. We summarize recent progress, focusing on the development of laser bars for highintensity pulse-pumping of alexandrite lasers. Specifically, high fill factor 1-cm bars packaged and tested (25°C, 10 Hz, 600 μs) on passively cooled mounts confirmed peak power of more than 350 𝑊 (> 0.2 𝐽 per bar), where efficiency was ~35% at 665 nm wavelength. Power was limited by thermal rollover. No evidence was seen for lateral lasing. Passively cooled 8-bar stack performance is presented, confirming a reliable optical power of 250 W/bar in stack format.

Citation Download Citation

M. Niemeyer, D. Martin, J. Pohl, M. Weyers, A. Knigge, P. Crump, H. Kissel, and J. Biesenbach "High-power-class QCW red laser bars and stacks for pump and direct application", Proc. SPIE 10900, High-Power Diode Laser Technology XVII, 1090009 (11 March 2019); https://doi.org/10.1117/12.2509895

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