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            Demonstration of High-Power and Stable Single-Mode in a Quantum Cascade Laser Using Buried Sampled Grating

            2019-04-18

            Authors: Cheng, FM; Zhang, JC; Wang, DB; Gu, ZH; Zhuo, N; Zhai, SQ; Wang, LJ; Liu, JQ; Liu, SM; Liu, FQ; Wang, ZG
            NANOSCALE RESEARCH LETTERS
            Volume: 14 Published: APR 3 2019 Language: English Document type: Article
            DOI: 10.1186/s11671-019-2954-6
            Abstract:
            High-power, low-threshold stable single-mode operation buried distributed feedback quantum cascade laser by incorporating sampled grating emitting at 4.87m is demonstrated. The high continuous wave (CW) output power of 948mW and 649mW for a 6-mm and 4-mm cavity length is obtained at 20 degrees C, respectively, which benefits from the optimized optical field distribution of sampled grating. The single-mode yields of the devices are obviously enhanced by controlling cleaved positions of the two end facets precisely. As a result, stable single-mode emission and mode tuning linearly without any mode hopping of devices are obtained under the different heat sink temperatures or high injection currents.
            全文链接:https://link.springer.com/article/10.1186/s11671-019-2954-6  



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