High-power, high-brightness 100 W QCW diode laser at 940 nm

Published in:
Proc. SPIE 6456, 64560K (2007).
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Abstract:
We demonstrate 940 nm diode lasers with more than 100 W QCW output power having an aperture width 5 to 10 times smaller than commonly used 10 mm bars. We used a super-large vertical waveguide structure to reduce the facet load. The waveguide design results in a very small vertical divergence of only 14° FWHM (24° including 95% of power). The threshold current of a device with 1 mm wide aperture is about 8 A and the slope efficiency is above 70%. The lateral far field width is below 10°, including 95% of power, and the wall plug efficiency is around 50% at 100 W output power.

Keywords:
diode lasers, quasi-CW, high-power, high-brightness, InGaAs/AlGaAs

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