Fast intracavity polarization dynamics of an erbium-doped fiber ring laser: Inclusion of stochastic effects
Fast intracavity polarization dynamics of an erbium-doped fiber ring laser: Inclusion of stochastic effects
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DOI：
10.1103/physreva.55.2376
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发表时间：
1997-03
影响因子：
2.9
通讯作者：
Q. L. Williams;J. García-Ojalvo;R. Roy
中科院分区：
文献类型：
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作者：
Q. L. Williams;J. García-Ojalvo;R. Roy
研究了单向掺铒光纤激光器的动力学，时间尺度短到足以观察，具有良好的分辨率，其行为的激光腔中的个人往返。使用腔内偏振控制器，可以观察到丰富的非线性现象，从自脉冲到两个正交偏振态的方波反相图案。这些模式在时间上不断演变。提出了一种描述该系统的随机时滞微分方程模型。数值模拟表明，该模型令人满意地占所有类型的定性行为，并揭示，包括自发发射噪声是必要的，以重现所观察到的连续模式的演变。两种不同的，典型类型的非线性动力学状态的数值和实验发现：一个确定性的，低维政权和噪声驱动的高维运动。
The dynamics of a unidirectional erbium-doped fiber laser is investigated on a time scale short enough to observe, with good resolution, its behavior for individual round-trips in the laser cavity. With an intracavity polarization controller, a rich variety of nonlinear phenomena, ranging from self-pulsing to square-wave antiphase patterns in two orthogonal states of polarization, are observed. These patterns evolve continuously in time. A stochastic delay-differential equation model is proposed to describe this system. Numerical simulations show that this model satisfactorily accounts for all types of qualitative behavior and reveal that the inclusion of spontaneous-emission noise is necessary to reproduce the observed continuous pattern evolution. Two different, typical types of nonlinear dynamical states are found both numerically and experimentally: a deterministic, low-dimensional regime and a noise-driven high-dimensional motion.