Regular dynamics of low-frequency fluctuations in external cavity semiconductor lasers

作     者：Ruslan L. Davidchack Ying-Cheng Lai Athanasios Gavrielides Vassilios Kovanis 

作者机构：Department of Mathematics and Computer Science University of Leicester Leicester LE1 7RH United Kingdom Departments of Mathematics Electrical Engineering and Physics Center for Systems Science and Engineering Arizona State University Tempe Arizona 85287 Nonlinear Optics Group Air Force Research Laboratory DELO Kirtland AFB Albuquerque New Mexico 87117 Department of Electrical and Computer Engineering University of New Mexico Albuquerque New Mexico 87131 

出 版 物：《Physical Review E》 (物理学评论E辑：统计、非线性和软体物理学)

年 卷 期：2001年第63卷第5期

页      面：056206-056206页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0702[理学-物理学] 

主　　题：.semiconductor lasers quasiperiodic commonly pumping external cavity regular dynamics linewidth LK equations low-frequency fluctuations LFF 

摘      要：It is commonly believed that the dynamics responsible for low-frequency fluctuations (LFF’s) in external cavity semiconductor lasers is stochastic or chaotic. A common approach to address the origin of LFF’s is to investigate the dynamical behavior of, and the interaction among, various external cavity modes in the Lang-Kobayashi (LK) paradigm. In this paper, we propose a framework for understanding of the LFFs based on a different set of fundamental solutions of the LK equations, which are periodic or quasiperiodic, and which are characterized by a sequence of time-locked pulses with slowly varying magnitude. We present numerical evidence and heuristic arguments, indicating that the dynamics of LFF’s emerges as a result of quasiperiodic bifurcations from these solutions as the pumping current increases. Regular periodic solutions can actually be observed when (1) the feedback level is moderate, (2) pumping current is below solitary threshold, and (3) the linewidth enhancement factor is relatively large.