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利用双光反馈垂直腔面发射半导体激光器(VCSELs) 两个正交偏振模式输出的两个混沌信号作为混沌载波, 构建了一个双信道的混沌保密通信系统, 并对该系统的通信性能进行了数值仿真研究.研究结果表明: 通过合理的选取反馈参量, 双光反馈VCSELs两个偏振模式输出的混沌信号能很好地隐藏外腔反馈延时特性; 双光反馈VCSEL两个偏振模式输出的混沌信号通过偏振保持注入到接收VCSEL中, 在强注入锁定条件下可以实现很好的混沌同步, 同步性能对频率失谐的容忍性随着注入强度的增加而加强; 在附加混沌调制加密方式下, 500 Mbit/s的信号在传输过程中能够得到很好的隐藏, 同时在接收端可以成功解调; 随着通信速率的增加, Q因子呈现下降的趋势, 但对于 6 Gbit/s的信息, Q因子仍大于6.Using two orthogonal polarization mode outputs from a vertical-cavity surface emitting lasers (VCSEL) with double optical feedback as two chaotic carriers, a dual-channel chaos secure communication system is established, and the synchronization and communication performances of such a system are numerically investigated. The results show that under suitable operated condition, the time-delay signatures of two chaotic carriers originating from two linear polarization modes in the T-VCSLE with double optical feedback can be suppressed efficiently. Under the strong injection locking case, high-quality chaos synchronization between two corresponding modes of T-VCSEL and R-VCSEL can be realized by polarization-preserved optical injection from T-VCSEL to R-VCSEL. Moreover, the tolerance of the synchronization quality on the frequency detuning between T-VCSEL and R-VCSEL is enhanced with the increase of the injection strength. Adopting additive chaos modulation encryption scheme, two pieces of 500 Mbit/s encoded message can be hidden efficiently in the two chaotic carriers in the propagation process and can be successfully extracted at the receiver. Although Q factor decreases with the increase of message transmission rate, the values of Q factor for two channels are still larger than 6 for 6 Gbit/s message.
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Keywords:
- vertical-cavity surface emitting lasers /
- double optical feedback /
- dual-channel /
- chaos communication
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[1] Pecora L M, Carroll T L 1990 Phys. Rev. Lett. 64 821
[2] Argyris A, Syvridis D, Larger L, Annovazzi-Lodi V, Colet P, Fischer I, García-Ojalvo J, Mirasso C R, Pesquera L, Shore K A 2005 Nature 438 343
[3] Masoller C 2001 Phys. Rev. Lett. 86 2782
[4] Xia G Q, Wu Z M, Wu J G 2005 Opt. Express 13 3445
[5] Rogister F, Locquet A, Pieroux D, Sciamanna M, Deparis O, Mégret P, Blondel M 2001 Opt. Lett. 26 1486
[6] Ding L, Wu Z M, Wu J G, Xia G Q 2012 Acta Phys. Sin. 61 014212 (in Chinese) [丁灵, 吴正茂, 吴加贵, 夏光琼 2012 61 014212]
[7] Torre M S, Masoller C, Shore K A 2004 J. Opt. Soc. Am. B 21 1772
[8] Gatare I, Sciamanna M, Locquet A, Panajotov K 2007 Opt. Lett. 32 1629
[9] Hong Y H, Lee M W, Paul J, Spencer P S, Shore K A 2008 Opt. Lett. 33 587
[10] Hong Y H, Lee M W, Spencer P S, Shore K A 2004 Opt. Lett. 29 1215
[11] Sciamanna M, Gatare I, Locquet A, Panajotov K 2007 Phys. Rev. E 75 056213
[12] Xiang S Y, Pan W, Yan L S, Luo B, Zou X H, Jiang N, Yang L 2011 Opt. Lett. 36 3497
[13] Zhang W L, Pan W, Luo B, Li X F, Zou X H, Wang M Y 2006 Opt. Rev. 13 443
[14] Locquet A, Masoller C, Mirasso C R 2002 Phys. Rev. E 65 056205
[15] Yan S L 2008 Acta Phys. Sin. 57 2819 (in Chinese) [颜森林 2008 57 2819]
[16] Guo D M, Yang L Z, Wang A B, Zhang X J, Wang Y C 2009 Acta Phys. Sin. 58 8275 (in Chinese) [郭东明, 杨玲珍, 王安邦, 张秀娟, 王云才 2009 58 8275]
[17] Jiang N, Pan W, Luo B, Xiang S Y, Yang L 2012 IEEE Photon. Technol. Lett. 24 1094
[18] Vicente R, Daudén J, Colet P, Toral R 2005 IEEE J. Quantum Electron. 41 541
[19] Bezruchko B P, Karavaev A S, Ponomarenko V I, Prokhorov M D 2001 Phys. Rev. E 64 056216
[20] Hegger R, Bnner M J, Kantz H, Giaquinta A 1998 Phys. Rev. Lett. 81 558
[21] Kouomou Y C, Colet P, Larger L, Gastaud N 2005 IEEE J. Quantum Electron. 41 156
[22] Lee M W, Rees P, Shore K A, Ortin S, Pesquera L, Valle A 2005 IEE Proc. Optoelectron. 152 97
[23] Wu J G, Xia G Q, Wu Z M 2009 Opt. Express 17 20124
[24] Ding L, Wu J G, Xia G Q, Shen J T, Li N Y, Wu Z M 2011 Acta Phys. Sin. 60 014210 (in Chinese) [丁灵, 吴加贵, 夏光琼, 沈金亭, 李能尧, 吴正茂 2011 60 014210]
[25] Xiao P, Wu Z M, Wu J G, Jiang L, Deng T, Tang X, Fan L, Xia G Q 2013 Opt. Commun. 286 339
[26] Xiang S Y, Pan W, Luo B, Yan L S, Zou X H, Jiang N, Yang L, Zhu H N 2011 Opt. Commun. 284 5758
[27] Wu J G, Wu Z M, Tang X, Lin X D, Deng T, Xia G Q, Feng G Y 2011 IEEE Photon. Technol. Lett. 23 759
[28] Wu J G, Wu Z M, Xia G Q, Feng G Y 2012 Opt. Express 20 1741
[29] Zhao Y F 2009 Acta Phys. Sin. 58 6058 (in Chinese) [赵严峰 2009 58 6058]
[30] Regalado J M, Prati F, Miguel M S, Abraham N B 1997 IEEE J. Quantum Electron. 33 765
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