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Stable single-mode 20-channel uniform buried grating DFB QCL array emitting at ~ 8.3 μm

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Abstract

A 20-channeldistributed feedback (DFB) quantum cascade laser (QCL) arrays based on uniform buried grating have been demonstrated. In pulsed mode, peak power reaches 80 mW and slope efficiency reaches 167 mW/A for 2.5 mm-long laser in the arrays at room temperature. The loss difference of two band-edge mode increases when reflectivity of the front facet becomes small, which prevents the mode hopping. The device shows linear tuning after the anti-reflectivity coating is deposited in the front facet, maintaining peak power of 64 mW. The whole chip covers a tuning range of 64 cm−1, centering at 8.3 μm, with side-mode-suppression-ratio over 20 dB at room temperature.

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Acknowledgements

This work was supported by the National Key Research and Development Pro-gram of China (2018YFA0209100), the National Natural Science Foundation of China (Grant Nos.61991430, 61774146, 61790583, 61674144, 61774150 and 61805168), the Beijing Municipal Sci-ence & Technology Commission (Grant No. Z20110000 4020006) and the Key Projects of CAS (Grant Nos. 2018147, YJKYYQ20190002, QYZDJ-SSW-JSC027 and XDB43000000).

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Authors and Affiliations

  1. School of Electronic Science and Engineering, Nanjing University, Nanjing, 210093, China

    Fan Ye & Yi Shi

  2. Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China

    Fan Ye, Fengmin Cheng, Zhiwei Jia, JinChuan Zhang, Ning Zhuo & Fengqi Liu

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  1. Fan Ye
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  2. Fengmin Cheng
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  3. Zhiwei Jia
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  4. JinChuan Zhang
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  6. Fengqi Liu
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  7. Yi Shi
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Correspondence to JinChuan Zhang.

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Ye, F., Cheng, F., Jia, Z. et al. Stable single-mode 20-channel uniform buried grating DFB QCL array emitting at ~ 8.3 μm. Opt Quant Electron 54, 236 (2022). https://doi.org/10.1007/s11082-022-03644-5

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