摘要
为了研究多调制延时混沌系统的动力学,用数值计算法研究了非相干光反馈与非相干光注入半导体激光器的多常数延时与多调制延时混沌同步,由于该系统是基于非相干注入的,所以不需要接收激光器与发送激光器频率完全匹配。另外,研究了非相干光反馈半导体激光器输出自相关函数。结果表明,多常数延时和多调制延时两种情况下都能获得高质量的同步,但在多调制延时系统中自相关函数的延时标识可以被隐藏,这一特性大大提高了系统的安全性,非常适用于混沌保密通信系统。
To exam the chaotic dynamics of multiple modulated delays system, the synchronization in multiple constant and modulated time delay chaotic lasers subject to incoherent optical feedbacks and incoherent optical injection is numerically investigated, in which the semiconductor lasers are subject to incoherent injection that fine tuning of optical frequency is not required. Furthermore, the autocorrelation function of the incoherent feedback semiconductor laser output is also investigated. The results indicate that high quality of synchronization can be obtained under both the cases. However, the signatures of time delays under modulated delays case can be hidden, which largely improves the system security and is important for the suitability of such laser systems for secure chaos-based communication systems.
出处
《激光技术》
CAS
CSCD
北大核心
2010年第4期440-442,455,共4页
Laser Technology
基金
上海市教委科研创新基金资助项目(09YZ223)
上海市研究生创新基金资助项目(JWCXSL0901)
关键词
激光光学
混沌同步
非相干光反馈与非相干光注入
多常数延时
多调制延时
laser optics
chaos synchronization
incoherent optical feedback and incoherent optical injection
multiple constant delays
multiple modulated delays
