Interband cascade laser emitting >1 photon per injected electron
- 1 November 1997
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 9 (11) , 1433-1435
- https://doi.org/10.1109/68.634699
Abstract
A 22-stage interband cascade laser with a "W" active region for enhanced gain has exhibited lasing at /spl lambda/=3.0 μm. Threshold current densities are lower than the best reported intersubband quantum cascade laser results at all T up to the maximum lasing temperature of 225 K. At 100 K, output powers up to 430 mW are observed, and the slope of 274 mW/A per facet for high injection levels corresponds to a quantum efficiency of 1.3 photons emitted for every injected electron.Keywords
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