11 October 2010 Progress of laser diode arrays operating under harsh conditions
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Abstract
High Power Laser Diodes (HPLD) are increasingly used in different fields of applications such as Industry, Medical and Defense. Significant improvements of performances (especially in efficiency) and a reproducible manufacturing process have led to reliable, highly robust components. For defense and security applications these devices are used predominantly for pumping of solid state lasers (range finders, designators and countermeasures) but also as direct light source (illuminator, pointer,...). For these applications the devices not only have to show outstanding electro optical performances but the packaging must also be robust enough to sustain the harsh environmental requirements. Due to recent progress in both semiconductor technology and packaging, QLD was able to push the peak power up to 400W per bar at 808nm. At this wavelength QLD has achieved record high efficiencies close to 65% in production. Thanks to a very small bar to bar pitch down to 330μm our stacks deliver peak power densities as high as 12 kW/cm². Even at 400 μm pitch the bars can be collimated in order to improve the beam quality.
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Andreas Kohl, Andreas Kohl, Thierry Fillardet, Thierry Fillardet, Herve Moisan, Herve Moisan, Eric Brousse, Eric Brousse, } "Progress of laser diode arrays operating under harsh conditions", Proc. SPIE 7835, Electro-Optical Remote Sensing, Photonic Technologies, and Applications IV, 78350Q (11 October 2010); doi: 10.1117/12.865570; https://doi.org/10.1117/12.865570
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