Author(s): Jia, ZW (Jia, Zhi-Wei); Li, L (Li, Li); Guo, YY (Guo, Yi-Yan); Wang, AB (Wang, An-Bang); Han, H (Han, Hong); Zhang, JC (Zhang, Jin-Chuan); Li, P (Li, Pu); Zhai, SQ (Zhai, Shen-Qiang); Liu, FQ (Liu, Feng-Qi)

Source: CHINESE PHYSICS B Volume: 31 Issue: 10 Article Number: 100505 DOI: 10.1088/1674-1056/ac8f34 Published: OCT 1 2022

Abstract: 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 tau (inj), 2 tau (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.

Accession Number: WOS:000864448600001

ISSN: 1674-1056

eISSN: 2058-3834

Full Text: https://iopscience.iop.org/article/10.1088/1674-1056/ac8f34