Abstract
Using the recently proposed shallow-well design, we demonstrate InP based quantum cascade lasers (QCLs) emitting around 4.9 μm with 27% and 21% wall plug efficiencies in room temperature (298 K) pulsed and continuous wave (cw) operations, respectively. The laser core consists of 40 QCL-stages. The highest cw efficiency is obtained from a buried-ridge device with a ridge width of 8 μm and a cavity length of 5 mm. The front and back facets are antireflection and high-reflection coated, respectively. The maximum single facet cw power at room temperature amounts to 5.1 W.
Original language | English (US) |
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Article number | 181102 |
Journal | Applied Physics Letters |
Volume | 98 |
Issue number | 18 |
DOIs | |
State | Published - May 2 2011 |
Funding
The authors would like to acknowledge the support, interest, and encouragement of Dr. R. S. Rodgers and Dr. M. Rosker from Defense Advanced Research Projects Agency, Dr. T. Manzur from Naval Air Warfare Center, and Dr. J. Meyer from Naval Research Laboratory.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)