摘要
Dynamic states in mutual-coupled mid-infrared quantum cascade lasers(QCLs) were numerically investigated in the parameter space of injection strength and detuning frequency based on the Lang-Kobayashi equations model. Three types of period-one states were found, with different periods of injection time delay τ_(inj), 2τ_(inj), and reciprocal of the detuning frequency. Besides, square-wave, quasi-period, pulse-burst and chaotic oscillations were also observed. It is concluded that external-cavity periodic dynamics and optical modes beating are the mainly periodic dynamics. The interaction of the two periodic dynamics and the high-frequency dynamics stimulated by strong injection induces the dynamic states evolution.This work helps to understand the dynamic behaviors in QCLs and shows a new way to mid-infrared wide-band chaotic laser.
作者
Zhi-Wei Jia
Li Li
Yi-Yan Guo
An-Bang Wang
Hong Han
Jin-Chuan Zhang
Pu Li
Shen-Qiang Zhai
Feng-Qi Liu
贾志伟;李丽;郭一岩;王安帮;韩红;张锦川;李璞;翟慎强;刘峰奇(Key Laboratory of Advanced Transducers and Intelligent Control System,Ministry of Education and Shanxi Province,College of Physics and Optoelectronics,Taiyuan University of Technology,Taiyuan 030024,China;Key Laboratory of Semiconductor Materials Science,Beijing Key Laboratory of Low Dimensional Semiconductor Materials and Devices,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China)
基金
Project supported by the National Key Research and Development Program of China (Grant No. 2019YFB1803500)
the National Natural Science Foundation of China (Grant No. 61805168)
the Natural Science Foundation of Shanxi Province, China (Grant Nos. 201801D221183 and 20210302123185)
International Cooperation of Key Research and Development Program of Shanxi Province (Grant No. 201903D421012)
Research Project Supported by Shanxi Scholarship Council of China (Grant No. 2021-032)
Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi (Grant No. 2019L0133)
Fund for Shanxi “1331 Project” Key Innovative Research Team。
