VCSELs在极化切换点附近正弦信号调制下的极化动力学
Polarization Dynamics in VCSELs Under Sinusoidal Signal Modulation around the Polarization Switching point
AI总结：
本研究通过自旋翻转模型分析VCSELs在极化切换点附近正弦电流调制下的极化动力学，揭示了调制参数对极化稳定性的影响，为高-speed光通信和传感应用提供控制策略。
摘要：
垂直腔面发射激光器（VCSELs）结合紧凑几何结构、低阈值电流和易于集成，使其成为现代光子系统的核心。然而，其极化行为仍然是影响性能的关键因素，因为发射状态可以在所谓的极化切换点附近在正交极化模式之间切换。这一区域表现出高度敏感性，其中微小扰动会引发突变的极化变化和非线性响应。在本工作中，利用自旋翻转模型对VCSELs在切换点附近进行正弦电流调制的极化动力学进行了数值研究。研究考察了调制频率、幅度和偏置电流的影响，揭示了包括极化锁定、周期性和不规则切换在内的不同动态区域。观察到的区域间过渡阐明了调制与极化稳定性之间的相互作用，为高-speed光通信和传感应用中的VCSEL动态控制提供了见解。
英文摘要：
Vertical-Cavity Surface-Emitting Lasers (VCSELs) combine compact geometry, low threshold current, and ease of integration, making them central to modern photonic systems. However, their polarization behavior remains a critical factor affecting performance, as the emission state can switch between orthogonally polarized modes around the so-called polarization switching point. This regime exhibits high sensitivity, where small perturbations induce abrupt polarization changes and nonlinear responses. In this work, the polarization dynamics of VCSELs under sinusoidal current modulation around the switching point are numerically investigated using the Spin-Flip Model. The study examines the influence of modulation frequency, amplitude, and bias current, revealing distinct dynamical regimes including polarization locking, periodic and irregular switching. The observed transitions between regimes elucidate the interplay between modulation and polarization stability, providing insight into the control of VCSEL dynamics for high-speed optical communication and sensing applications.
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