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Proceedings Paper

Mid-infrared quantum cascade lasers with high wall plug efficiency
Author(s): Y. Bai; B. Gokden; S. Slivken; S. R. Darvish; S. A. Pour; M. Razeghi
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Paper Abstract

We demonstrate optimization of continuous wave (cw) operation of 4.6 μm quantum cascade lasers (QCLs). A 19.7 μm by 5 mm, double channel processed device exhibits 33% cw WPE at 80 K. Room temperature cw WPE as high as 12.5% is obtained from a 10.6 μm by 4.8 mm device, epilayer-down bonded on a diamond submount. With the semi-insulating regrowth in a buried ridge geometry, 15% WPE is obtained with 2.8 W total output power in cw mode at room temperature. This accomplishment is achieved by systematically decreasing the parasitic voltage drop, reducing the waveguide loss and improving the thermal management.

Paper Details

Date Published: 26 January 2009
PDF: 10 pages
Proc. SPIE 7222, Quantum Sensing and Nanophotonic Devices VI, 72220O (26 January 2009); doi: 10.1117/12.810281
Show Author Affiliations
Y. Bai, Northwestern Univ. (United States)
B. Gokden, Northwestern Univ. (United States)
S. Slivken, Northwestern Univ. (United States)
S. R. Darvish, Northwestern Univ. (United States)
S. A. Pour, Northwestern Univ. (United States)
M. Razeghi, Northwestern Univ. (United States)


Published in SPIE Proceedings Vol. 7222:
Quantum Sensing and Nanophotonic Devices VI
Manijeh Razeghi; Rengarajan Sudharsanan; Gail J. Brown, Editor(s)

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