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Proceedings Paper

High power photonic crystal distributed feedback quantum cascade lasers emitting at 4.5 μm
Author(s): Burç Gökden; Steven B. Slivken; Manijeh Razeghi
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Paper Abstract

Quantum cascade lasers possess very small linewidth enhancement factor, which makes them very prominent candidates for realization of high power, nearly diffraction limited and single mode photonic crystal distributed feedback broad area lasers in the mid-infrared frequencies. In this paper, we present room temperature operation of a two dimensional photonic crystal distributed feedback quantum cascade laser emitting at 4.5 μm. peak power up to ~0.9 W per facet is obtained from a 2 mm long laser with 100 μm cavity width at room temperature. The observed spectrum is single mode with a very narrow linewidth. Far-field profile has nearly diffraction limited single lobe with full width at half maximum of 3.5o normal to the facet. The mode selection and power output relationships are experimentally established with respect to different cavity lengths for photonic crystal distributed feedback quantum cascade lasers.

Paper Details

Date Published: 23 January 2010
PDF: 7 pages
Proc. SPIE 7608, Quantum Sensing and Nanophotonic Devices VII, 760806 (23 January 2010); doi: 10.1117/12.855649
Show Author Affiliations
Burç Gökden, Northwestern Univ. (United States)
Steven B. Slivken, Northwestern Univ. (United States)
Manijeh Razeghi, Northwestern Univ. (United States)


Published in SPIE Proceedings Vol. 7608:
Quantum Sensing and Nanophotonic Devices VII
Manijeh Razeghi; Rengarajan Sudharsanan; Gail J. Brown, Editor(s)

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