Distributed Feedbacks for Time-Delay Signature Suppression of Chaos Generated From a Semiconductor Laser
Distributed Feedbacks for Time-Delay Signature Suppression of Chaos Generated From a Semiconductor Laser
复制标题
DOI：
10.1109/jphot.2012.2220759
复制
发表时间：
2012-10-01
影响因子：
2.4
通讯作者：
Chan, Sze-Chun
中科院分区：
文献类型：
--
作者：
Li, Song-Sui;Liu, Qing;Chan, Sze-Chun
通过详细的模拟研究了光纤布拉格光栅（FBG）分布反馈作用下半导体激光器的混沌动力学。由于沿着光纤光栅的分布反射，光纤光栅反馈的方法比传统的反射镜反馈的方法更好地隐藏反馈延迟时间在混沌产生。从自相关函数获得的时间延迟签名随着FBG带宽的减小而减小，这归因于FBG色散的相关增加。通常在反馈参数的范围内观察到这种时间延迟特征抑制。激光器的FBG反馈的动态映射揭示了大区域的混沌状态，除了当FBG带宽比激光器的弛豫共振频率窄得多。
Chaotic dynamics of a semiconductor laser subject to distributed feedbacks from a fiber Bragg grating (FBG) are investigated through detailed simulations. Because of distributed reflections along the FBG, the approach of FBG feedback performs better than the conventional approach of mirror feedback in concealing the feedback delay time in chaos generation. The time-delay signature obtained from the autocorrelation function decreases as the FBG bandwidth decreases, which is attributed to the associated increase in the FBG dispersion. Such time-delay signature suppression is generally observed over a range of feedback parameters. The dynamical mappings of the laser subject to FBG feedback reveal large regions of chaotic states, except when the FBG bandwidth is much narrower than the relaxation resonance frequency of the laser.