Nonlinear dynamics of sole ground-state emitting quantum dot laser subject to optical injection

• Main Authors: Zhang, Ding-Mei, Jiang, Zai-Fu, Deng, Yan-Lin, Li, Yan-Li, Yang, Wen-Yan, Xiong, Ze-Ben
• Format: Conference Proceeding
• Language: English
• Published: SPIE 09.10.2021
• ISBN: 1510646590; 9781510646599
• ISSN: 0277-786X
• DOI: 10.1117/12.2601353

Based on the three-energy level exciton model of the quantum dot lasers (QDLs), the nonlinear dynamics of the sole ground-state emitting QDL (GS-QDL) under external optical injection is numerically studied. The results show that the GS-QDL can generate period-one, period-two, multi-period, chaotic pulse and injection locking states under suitable injection parameters. By analyzing the distribution of these dynamic states in the injection parameter space, it is found that the period-one state and injection locking state occupy a large area, but the region of the complex dynamics is relatively small. Moreover, the complexity of the chaotic signals generated by the GS-QDL is quantified by the permutation entropy calculation. The results show that the complexity of the chaotic signals is less than 0.90, which indicates that the GS-QDL is low sensitivity to external optical injection. The GS-QDL can be used in isolator-free photonic integrated circuits.