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