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- Title
Demonstration of High-Power and Stable Single-Mode in a Quantum Cascade Laser Using Buried Sampled Grating.
- Authors
Cheng, Feng-Min; Zhang, Jin-Chuan; Wang, Dong-Bo; Gu, Zeng-hui; Zhuo, Ning; Zhai, Shen-Qiang; Wang, Li-Jun; Liu, Jun-Qi; Liu, Shu-Man; Liu, Feng-Qi; Wang, Zhan-Guo
- 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.
- Subjects
QUANTUM cascade lasers; FIREPLACES; HEAT sinks
- Publication
Nanoscale Research Letters, 2019, Vol 14, Issue 1, pN.PAG
- ISSN
1931-7573
- Publication type
Article
- DOI
10.1186/s11671-019-2954-6