Abstract:

We demonstrate tapered quantum cascade lasers monolithically integrated with a distributed Bragg reflector acting as both a wavelength-selective back mirror and a transverse mode filter. Each of the 14 devices operates at a different wavelength between 9.2 and 9.7 mu m, where nine devices feature single-mode operation at peak powers between 0.3 and 1.6W at room temperature. High output power and excellent beam quality with peak brightness values up to 1.6 MW cm(-2) sr(-1) render these two-terminal devices highly suitable for stand-off spectroscopy applications. (C) 2013 AIP Publishing LLC.