High power quantum cascade lasers

Details High power quantum cascade lasers High power quantum cascade lasers

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009njph...11l5017r&link_type=abstract

New Journal of Physics, Volume 11, Issue 12, pp. 125017 (2009).

Physics

16

Scientific paper

We report the most recent state-of-art quantum cascade laser results at wavelengths around 4.8 and 10 μm. At 4.8 μm, a room temperature wall plug efficiency (WPE) of 22 and 15.5% are obtained in pulsed mode and continuous wave (cw) mode, respectively. Room temperature cw output power reaches 3.4 W. The same laser design is able to reach a WPE of 36% at 120 K in pulsed mode. At 10 μm, room temperature average power of 2.2 W and cw power of 0.62 W are obtained. We also explore lasers utilizing the photonic crystal distributed feedback mechanism, and we demonstrate up to 12 W peak power operation at three different wavelengths around 4.7 μm with a waveguide width of 100 μm and diffraction limited beam quality.

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