论文标题
宽区域VCSEL中极化和横向模式的复杂非线性动力学
Complex nonlinear dynamics of polarization and transverse modes in a broad-area VCSEL
论文作者
论文摘要
激光可以表现出由多个激光模式相互作用驱动的非线性和混沌动力学，并研究模式竞争的不同情况和动态的分叉在基本水平以及应用方面都引起了极大的兴趣。我们研究了孤立的连续波操作中宽区域垂直腔表面发射激光（VCSEL）的动力学，并全面研究了其极化状态，激光光谱，近场分布和时间动力学。在一系列分叉中，双折射分裂频率和其他频率成分的波动发生。分叉与横向激光模式和/或极化状态的变化一致，这表明了空间和极化自由度在模式竞争中的重要性。结果，比单个空间模式的VCSEL的动力学更为复杂。
Lasers can exhibit nonlinear and chaotic dynamics driven by the interaction of multiple lasing modes, and investigating the different scenarios of mode competition and bifurcations of their dynamics is of great interest on a fundamental level as well as in view of applications. We study the dynamics of a broad-area vertical-cavity surface-emitting laser (VCSEL) in solitary continuous-wave operation with a comprehensive investigation of its polarization state, lasing spectra, near-field distributions, and temporal dynamics. Fluctuations at the frequency of birefringence splitting and other frequency components develop in a series of bifurcations. The bifurcations coincide with changes of the transverse lasing modes and/or the polarization state, demonstrating the importance of both the spatial and polarization degrees of freedom for mode competition. As a consequence, the inherent nonlinear dynamics of broad-area VCSELs is significantly more complex than the dynamics of VCSELs with a single spatial mode.
