Photonics Research, 2017, 5 (4): 04000320, Published Online: Oct. 10, 2018
Stable single-mode operation of a distributed feedback quantum cascade laser integrated with a distributed Bragg reflector Download: 677次
Abstract
We report an index-coupled distributed feedback quantum cascade laser by employing an equivalent phase shift (EPS) of quarter-wave integrated with a distributed Bragg reflector (DBR) at λ ~ 5.03 μm . The EPS is fabricated through extending one sampling period by 50% in the center of a sampled Bragg grating. The key EPS and DBR pattern are fabricated by conventional holographic exposure combined with the optical photolithography technology, which leads to improved flexibility, repeatability, and cost-effectiveness. Stable single-mode emission can be obtained by changing the injection current or heat sink temperature even under the condition of large driving pulse width.
Feng-Min Cheng, Zhi-Wei Jia, Jin-Chuan Zhang, Ning Zhuo, Shen-Qiang Zhai, Li-Jun Wang, Jun-Qi Liu, Shu-Man Liu, Feng-Qi Liu, Zhan-Guo Wang. Stable single-mode operation of a distributed feedback quantum cascade laser integrated with a distributed Bragg reflector[J]. Photonics Research, 2017, 5(4): 04000320.