J4 ›› 2012, Vol. 29 ›› Issue (4): 500-506.

• 光通信 • 上一篇    下一篇

两类混沌激光保密通信方案的性能分析

刘培洋, 赵清春, 殷洪玺   

  1. 大连理工大学信息与通信工程学院光通信与信息光子技术实验室,辽宁 大连 116024
  • 收稿日期:2011-06-09 修回日期:2011-07-25 出版日期:2012-07-28 发布日期:2012-07-01
  • 通讯作者: 殷洪玺(1958—)教授,博士生导师,主要从事光纤通信、光网络和光器件等方面的科研工作。 E-mail:hxyin@dlut.edu.cn
  • 作者简介:刘培洋(1986—)研究生,研究兴趣包括光纤通信和混沌激光保密通信等。E-mail:lpy.will.86@163.com
  • 基金资助:

    国家自然科学基金( 61071123和60772001),区域光纤通信网与新型光通信系统国家重点实验室(北京大学)开放基金和大连理工大学引进人才基金资助。

Performance analysis of two types of chaotic optical secure communication schemes

LIU Peiyang, ZHAO Qingchun, YIN Hongxi   

  1. Laboratory of Optical Communications and Photonic Technology, School of Information and Communication Engineering, Dalian University of Technology, Dalian 116024, China
  • Received:2011-06-09 Revised:2011-07-25 Published:2012-07-28 Online:2012-07-01

摘要:

半导体激光器在外加扰动下,可以产生高维宽带的混沌激光信号,是实现高速保密通信的理想载波。本文数值研究了混沌调制和混沌隐藏两种信息加载方式下的混沌激光保密通信系统的性能,分析了两种信息加载方式下系统分别传输正弦信息和数字信息时的信噪比和Q因子的变化情况,研究了两种信息加载方式下系统的相关系数随调制深度的变化趋势。结果表明,不同的调制深度或调制频率/速率都会影响系统的性能,且混沌调制方式的系统性能优于混沌隐藏方式。

关键词: 光通信, 混沌同步, 混沌调制, 混沌隐藏, 半导体激光器

Abstract:

High dimensional, broadband chaotic optical signal can be generated by a semiconductor laser with external disturbance, which is ideal carrier for high-speed secure communications. The performances of chaotic optical secure communication systems are numerically studied by encrypting the message by chaos modulation (CMO) or chaos masking (CMS).The variation of the signal-to-noise ratio (SNR) and Q-factor are demonstrated when sinusoidal message and digital message are transmitted separately by CMO or CMS. The correlation coefficient as a function of modulation depth (MD) is discussed. The results show that the system performance varies for different MD or modulation frequency/rate and the performance of CMO system is better than that of CMS.

Key words: chaotic optical communication, chaotic synchronization, chaos modulation, chaos masking, semiconductor laser

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