High Power Thermoelectrically Cooled and Uncooled Quantum Cascade Lasers With Optimized Reflectivity Facet Coatings
Patel, C. Kumar N
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CitationMaulini, Richard, Arkadiy Lyakh, Alexei Tsekoun, Rowel Go, Christian Pflügl, Laurent Diehl, Federico Capasso, and C. Kumar N. Patel. 2009. High power thermoelectrically cooled and uncooled quantum cascade lasers with optimized reflectivity facet coatings. Applied Physics Letters (95)15: 151112.
AbstractWe present a method of preserving the device wall-plug efficiency by adjusting mirror losses with facet coatings for longer cavity quantum cascade lasers. An experimental study of output power and wall-plug efficiency as functions of mirror losses was performed by varying the front facet coating reflectivity with a high-reflectivity-coated rear facet. The use of optimized reflectivity coatings on 7-mm-long chips resulted in continuous-wave output power of 2.9 W at 293 K for thermoelectrically cooled devices mounted on AlN submounts and average and continuous-wave output power in excess of 1 W for uncooled devices emitting at 4.6 µm.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:3426316
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