High-power CW mid-IR quantum cascade lasers

被引：0
|
作者：
Meyer, JR [1 ]
Bewley, WW [1 ]
Lindle, JR [1 ]
Vurgaftman, I [1 ]
Evans, AJ [1 ]
Yu, JS [1 ]
Slivken, S [1 ]
Razeghi, M [1 ]
机构：
[1] USN, Res Lab, Washington, DC 20375 USA
来源：
Quantum Sensing and Nanophotonic Devices II | 2005年 / 5732卷
关键词：
diode laser; quantum cascade laser; quantum well; mid-infrared;
D O I：
10.1117/12.597072
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
We report the cw operation of quantum cascade lasers that do not require cryogenic cooling and emit at lambda = 4.7-6.2 mu m. At 200 K, more than 1 W of output power is obtained from 12-mu m-wide stripes, with a wall-plug efficiency (eta(wall)) near 10 %. Room-temperature cw operation has also been demonstrated, with a maximum output power of 640 mW (eta(wall) = 4.5 %) at 6 mu m and 260 MW (eta(wall) = 2.3 %) at 4.8 mu m. Far-field characterization indicates that whereas the beam quality remains close to the diffraction limit in all of the tested lasers, in the devices emitting at 6.2 mu m the beam tends to steer by as much as 5-10 degrees in either direction with varying temperature and pump current.
引用
收藏
页码：161 / 168
页数：8
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