Journal
APPLIED PHYSICS LETTERS
Volume 106, Issue 9, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4914477
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Funding
- Undergraduate Research Grant of Northwestern University
- National Science Foundation [ECCS-1359779, ECCS-1306397, ECCS-1231289]
- Naval Air Warfare Center [N68335-13-C-0342]
- Department of Homeland Security Science and Technology Directorate [HSHQDC-13-C-00034]
- Early Stage Innovations grant from NASA's Space Technology Research Grants Program [NNX13AT10G]
- Div Of Electrical, Commun & Cyber Sys [1359779] Funding Source: National Science Foundation
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A quantum cascade laser (QCL) with an output power of 203W is demonstrated in pulsed mode at 283K with an angled cavity. The device has a ridge width of 300 mu m, a cavity length of 5.8 mm, and a tilt angle of 12 degrees. The back facet is high reflection coated, and the front facet is anti-reflection coated. The emitting wavelength is around 4.8 mu m. In distinct contrast to a straight cavity broad area QCL, the lateral far field is single lobed with a divergence angle of only 3 degrees. An ultrahigh brightness value of 156 MW cm(-2) sr(-1) is obtained, which marks the brightest QCL to date. (C) 2015 AIP Publishing LLC.
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