High power thermoelectrically cooled and uncooled quantum cascade lasers with optimized reflectivity facet coatings

被引：75
作者：
Maulini, Richard [1 ]
Lyakh, Arkadiy [1 ]
Tsekoun, Alexei [1 ]
Go, Rowel [1 ]
Pfluegl, Christian [2 ]
Diehl, Laurent [2 ]
Capasso, Federico [2 ]
Patel, C. Kumar N. [1 ,3 ]
机构：
[1] Pranalytica Inc, Santa Monica, CA 90401 USA
[2] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA
[3] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 91748 USA
来源：
APPLIED PHYSICS LETTERS | 2009年 / 95卷 / 15期
关键词：
PERFORMANCE;
D O I：
10.1063/1.3246799
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We 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 mu m. (C) 2009 American Institute of Physics. [doi:10.1063/1.3246799]
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页数：3
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