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

Nanoscale Research Letters

Ning Zhuo¹  Li-Jun Wang¹  Jun-Qi Liu¹  Feng-Min Cheng¹  Shen-Qiang Zhai¹  Jin-Chuan Zhang¹  Zeng-hui Gu¹  Zhan-Guo Wang¹  Dong-Bo Wang¹  Shu-Man Liu¹  Feng-Qi Liu¹ 

[1] Key Laboratory of Semiconductor Materials Science, Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices, Institute of Semiconductors, Chinese Academy of Sciences;

关键词: Quantum cascade laser;    Distributed feedback;    Sampled grating;   

DOI  :  10.1186/s11671-019-2954-6

来源: DOAJ

【 摘 要 】

Abstract High-power, low-threshold stable single-mode operation buried distributed feedback quantum cascade laser by incorporating sampled grating emitting at λ ~ 4.87 μm is demonstrated. The high continuous wave (CW) output power of 948 mW and 649 mW for a 6-mm and 4-mm cavity length is obtained at 20 °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.

【 授权许可】

Unknown