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利用耦合时延增强激光混沌系统安全性能研究

Investigation on Security Enhancement of Chaotic Optical Communication Systems via Coupling Delay

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摘要

安全性是混沌通信中的重要问题。基于一个外光反馈半导体激光器驱动两个互耦合激光器的混沌通信系统,研究激光混沌系统中反馈时延与耦合时延特征, 并应用龙格库塔法进行动态仿真。重点分析了当调节一些可控参数(耦合时延和驱动强度)时,能够改变两耦合激光器输出自相关函数中反馈时延和耦合时延幅值的差异,以此掩藏反馈时延,从而得出更优载波。仿真结果说明利用耦合时延可以增强激光混沌系统的安全性。最后给出了在优化载波后系统同步质量的讨论。

Abstract

The security issue is of vital importance in chaos-based communications. The characteristics of feedback delay and coupling delay in chaotic optical communication systems has been numerically studied, based on a chaos-based communication system composed of two mutually coupled semiconductor lasers driven by an external cavity semiconductor laser. Numerical simulation of the model is established with the Runge-Kutta method. The emphasis has been devoted to the following analysis: by adjusting some controllable parameters (coupling delay and injection strength), one can reasonably change the discrepancy between the amplitudes of feedback delay and coupling delay in autocorrelation function for the mutually coupled semiconductor lasers output. For this reason, the feedback delay is effectively concealed, and thus a better chaotic carrier can be obtained. More importantly, our numerical results demonstrate that the coupling delay is able to be employed to improve the security of chaotic optical communication systems. Finally, the discussion of synchronization quality of the dedicated system, under the optimized chaotic carrier circumstance, is given.

Newport宣传-MKS新实验室计划
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中图分类号:TN248.4;TN929.1

DOI:10.3788/cjl201239.0102009

所属栏目:激光物理

责任编辑:宋梅梅  信息反馈

基金项目:国家自然科学基金(60976039)和四川省基础研究项目(2011JY0030)资助课题。

收稿日期:2011-08-22

修改稿日期:2011-09-27

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作者单位    点击查看

张巧:西南交通大学信息科学与技术学院, 四川 成都 610031
潘炜:西南交通大学信息科学与技术学院, 四川 成都 610031
李念强:西南交通大学信息科学与技术学院, 四川 成都 610031
江宁:西南交通大学信息科学与技术学院, 四川 成都 610031
项水英:西南交通大学信息科学与技术学院, 四川 成都 610031

联系人作者:张巧(zhangqiao421@163.com)

备注:张巧(1987—),女,硕士研究生,主要从事半导体激光器和光通信等方面的研究。

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引用该论文

Zhang Qiao,Pan Wei,Li Nianqiang,Jiang Ning,Xiang Shuiying. Investigation on Security Enhancement of Chaotic Optical Communication Systems via Coupling Delay[J]. Chinese Journal of Lasers, 2012, 39(1): 0102009

张巧,潘炜,李念强,江宁,项水英. 利用耦合时延增强激光混沌系统安全性能研究[J]. 中国激光, 2012, 39(1): 0102009

被引情况

【1】赵清春,殷洪玺. 混沌光子储备池计算研究进展. 激光与光电子学进展, 2013, 50(3): 30003--1

【2】胡汉平,陈笑风,苏威,谢飞龙,高孝婧. 基于光电反馈延迟的多点耦合混沌同步和通信. 光学学报, 2014, 34(4): 406006--1

【3】秦海娟,方捻,王陆唐,黄肇明,吴春旭. 双向光纤环形混沌激光器相邻帧相似性的实验研究. 激光与光电子学进展, 2014, 51(8): 81402--1

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