| Citation: |
Zhang Jinchuan, Wang Lijun, Liu Wanfeng, Liu Fengqi, Zhao Lihua, Zhai Shenqiang, Liu Junqi, Wang Zhanguo. Distributed feedback quantum cascade lasers operating in continuous-wave mode
at λ ≈ 7.6 μm[J]. Journal of Semiconductors, 2012, 33(2): 024005. doi: 10.1088/1674-4926/33/2/024005
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Zhang J C, Wang L J, Liu W F, Liu F Q, Zhao L H, Zhai S Q, Liu J Q, Wang Z G. Distributed feedback quantum cascade lasers operating in continuous-wave mode at λ ≈ 7.6 μm[J]. J. Semicond., 2012, 33(2): 024005. doi: 10.1088/1674-4926/33/2/024005.
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Distributed feedback quantum cascade lasers operating in continuous-wave mode at λ ≈ 7.6 μm
doi: 10.1088/1674-4926/33/2/024005
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Abstract
Distributed feedback (DFB) quantum cascade lasers (QCLs) in continuous-wave (CW) mode emitting at λ ≈ 7.6 μm are presented. Holographic lithography was used to fabricate the first-order distributed feedback grating. For a high-reflectivity-coated QCL with 14.5-μm-wide and 3-mm-long cavity, CW output powers of 300 mW at 85 K and still 10 mW at 270 K are obtained. Single-mode emission with a side-mode suppression ratio (SMSR) of about 30 dB and a wide tuning range of ～300 nm in the temperature range from 85 to 280 K is observed. -
References
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