High-power, low-lateral divergence broad area quantum cascade lasers with a tilted front facet

被引:23
作者
Ahn, Sangil [1 ]
Schwarzer, Clemens [1 ]
Zederbauer, Tobias [1 ]
MacFarland, Donald C. [1 ]
Detz, Hermann [1 ]
Andrews, Aaron M. [1 ]
Schrenk, Werner [1 ]
Strasser, Gottfried [1 ]
机构
[1] Vienna Univ Technol, Inst Solid State Elect, A-1040 Vienna, Austria
基金
奥地利科学基金会;
关键词
SEMICONDUCTOR-LASERS;
D O I
10.1063/1.4863504
中图分类号
O59 [应用物理学];
学科分类号
摘要
We introduce a simple technique to improve the beam quality of broad area quantum cascade lasers. Moderately tilted front facets of the laser provide suppression of higher order lateral waveguide modes. A device with a width of 60 mu m and a front facet angle of 17 degrees shows a nearly diffraction limited beam profile. In addition, the peak output power and the slope efficiency of the device are increased since most of the light inside the cavity is emitted through the tilted front facet by an asymmetric light intensity distribution along the cavity. (C) 2014 AIP Publishing LLC.
引用
收藏
页数:4
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