Interband Cascade Lasers With Low Threshold Powers and High Output Powers
Interband Cascade Lasers With Low Threshold Powers and High Output Powers
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DOI：
10.1109/jstqe.2012.2237017
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发表时间：
2013-01
影响因子：
4.9
通讯作者：
I. Vurgaftman;W. Bewley;C. Canedy;C. Kim;Mijin Kim;C. Merritt;J. Abell;J. Meyer
中科院分区：
文献类型：
--
作者：
I. Vurgaftman;W. Bewley;C. Canedy;C. Kim;Mijin Kim;C. Merritt;J. Abell;J. Meyer
中波红外带间级联激光器可以在比量子级联激光器低30倍的阈值功率密度下工作。这最终归因于更长的带间载流子寿命，而不是腔尺寸和镜面反射率的具体要求。因此，ICL是目前正在为该光谱区域开发的便携式、电池供电的化学传感器的一个有吸引力的候选者。我们回顾了工作在2.9到5.5μm波长范围内的ICL的特性，并表明它们的俄歇系数在整个范围内变化不到3倍。因此，ICL的性能只会随着波长的增加而略有下降。报道了宽度为30μm、λ=3.7μm的外延倒装ICL脊线在室温下用M2≤3.1输出的连续波(CW)功率超过3 0 mW。在波纹侧壁刻蚀了四阶光栅的分布式反馈ICL在T=25°C的单谱模式下产生了55 mW的连续功率。
The midwave infrared interband cascade laser (ICL) can operate at threshold power densities 30 times lower than those of the quantum cascade laser. This is ultimately attributable to the much longer interband carrier lifetime, rather than to specifics of the cavity dimensions and mirror reflectivities. The ICL is therefore an attractive candidate for insertion into the portable, battery-powered chemical sensors now being developed for this spectral region. We review the characteristics of ICLs operating at wavelengths from 2.9 to 5.5 μm, and show that their Auger coefficients vary by less than a factor of 3 throughout this range. Consequently, the ICL performance degrades only modestly with increasing wavelength. We report that an epitaxial-side-down-mounted ICL ridge of width 30 μm and λ = 3.7 μm emits more than 300 mW of continuous wave (CW) output power at room temperature with M2 ≤ 3.1. A distributed-feedback ICL with a fourth-order grating etched into its corrugated sidewalls produces 55 mW of CW power in a single spectral mode at T = 25 °C.