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Proceedings Paper

High-power CW mid-IR quantum cascade lasers
Author(s): Jerry R. Meyer; William W. Bewley; James R. Lindle; Igor Vurgaftman; Allan J. Evans; Jae Su Yu; Steven Slivken; Manijeh Razeghi
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Paper Abstract

We report the cw operation of quantum cascade lasers that do not require cryogenic cooling and emit at λ = 4.7-6.2 μm. At 200 K, more than 1 W of output power is obtained from 12-μm-wide stripes, with a wall-plug efficiency (ηwall) near 10%. Room-temperature cw operation has also been demonstrated, with a maximum output power of 640 mW (ηwall = 4.5%) at 6 μm and 260 mW (ηwall = 2.3%) at 4.8 μm. Far-field characterization indicates that whereas the beam quality remains close to the diffraction limit in all of the tested lasers, in the devices emitting at 6.2 μm the beam tends to steer by as much as 5-10° degrees in either direction with varying temperature and pump current.

Paper Details

Date Published: 25 March 2005
PDF: 8 pages
Proc. SPIE 5732, Quantum Sensing and Nanophotonic Devices II, (25 March 2005); doi: 10.1117/12.597072
Show Author Affiliations
Jerry R. Meyer, Naval Research Lab. (United States)
William W. Bewley, Naval Research Lab. (United States)
James R. Lindle, Naval Research Lab. (United States)
Igor Vurgaftman, Naval Research Lab. (United States)
Allan J. Evans, Northwestern Univ. (United States)
Jae Su Yu, Northwestern Univ. (United States)
Steven Slivken, Northwestern Univ. (United States)
Manijeh Razeghi, Northwestern Univ. (United States)


Published in SPIE Proceedings Vol. 5732:
Quantum Sensing and Nanophotonic Devices II
Manijeh Razeghi; Gail J. Brown, Editor(s)

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