High-temperature operation of distributed feedback quantum-cascade lasers at 5.3 μm

被引：163
作者：
Hofstetter, D [1 ]
Beck, M [1 ]
Aellen, T [1 ]
Faist, J [1 ]
机构：
[1] Univ Neuchatel, Inst Phys, CH-2000 Neuchatel, Switzerland
来源：
APPLIED PHYSICS LETTERS | 2001年 / 78卷 / 04期
关键词：
D O I：
10.1063/1.1340865
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
High-temperature operation of a low-threshold 5.3 mum quantum-cascade distributed feedback laser is presented. The emission spectrum was single mode with more than 20 dB side mode suppression ratio for all investigated temperatures and up to thermal rollover. For 1.5% duty cycle and at 0 degreesC, the laser emitted 1.15 W of single mode peak power; at 120 degreesC, a value of 92 mW was seen. For a 3 mm long device, we observed a room-temperature threshold current density of 3.6 kA/cm(2). This remarkable performance is mainly due to a 4 quantum-well active region using a double phonon resonance for the lower laser level. (C) 2001 American Institute of Physics.
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页码：396 / 398
页数：3
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