Numerical Investigation on Feedback Insensitivity in Semiconductor Nanolasers
Numerical Investigation on Feedback Insensitivity in Semiconductor Nanolasers
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DOI：
10.1109/jstqe.2019.2899765
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发表时间：
2019-02
影响因子：
4.9
通讯作者：
Yuanlong Fan;Yanhua Hong;Pu Li
中科院分区：
文献类型：
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作者：
Yuanlong Fan;Yanhua Hong;Pu Li
本文数值研究了外光反馈作用下反馈相位对半导体纳米激光器稳定性的影响。为此，从速率方程出发，考虑了珀塞尔腔增强自发辐射因子F和增强自发辐射耦合因子β的影响，得到了数值解。以这种方式，当反馈耦合分数低于临界阈值ηc时，识别相位不敏感的稳定SNL。此外，还研究了ηc与注入电流（Idc）和初始外腔长（L0）的关系。结果表明，ηc与Idc或L0均呈双指数关系。此外，还计算了F对ηc的影响，发现ηc随F的增大而增大。本文的结果为设计相位不敏感的稳定SNL提供了实用的指导，这对于基于密集集成光子电路的应用，如光通信和传感，是有用的。
This paper presents numerical investigations into the effect of feedback phase on the stability of semiconductor nanolasers (SNLs) in the presence of the external optical feedback. For this purpose, numerical solutions are obtained from rate equations where the effects of Purcell cavity-enhanced spontaneous emission factor F and an enhanced spontaneous emission coupling factor β are included. In this way, a phase-insensitive stable SNL is identified when the feedback coupling fraction is below a critical threshold ηc. Furthermore, the relationship between ηc and two other important system parameters, namely the injection current (Idc) and the initial external cavity length (L0), is studied. The results show that ηc has a bi-exponential relationship with either Idc or L0. Moreover, the influence of F on the ηc is evaluated, and it is found that ηc increases with the increase of F. The results presented in this paper provide practical guidelines for the design of phase-insensitive stable SNLs, which are useful for densely integrated photonic circuits based applications, such as optical communications and sensing.