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In a double optical feedback semiconductor laser chaotic system, by fixing the feedback time and feedback strength of the one mirror (named as fixed cavity M1), the influences of the feedback time and feedback strength of the other mirror (named as tunable cavity M2) on the time delay feedback signatures of the chaotic system have been investigated experimentally. The results show that, for the case of the two cavities with identical feedback strengths, time delay feedback signatures of chaotic output can be suppressed efficiently when the cavity length of M2 is approximately equal (but can not exactly equal) to the cavity length of M1 (or half of the cavity length of M1). Fixing the length of M2 to approximately equal to the cavity length of M1 (or half of the cavity length of M1), the time delay feedback signature suppression can be further improved through adjusting the feedback strength of M2 carefully. Therefore, adopting a double optical feedback semiconductor laser chaotic system can make the system behave with higher security due to the efficient hiding of delay feedback parameter of the system.
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[13] Kanter I, Aviad Y, Reidler I, Cohen E, Rosenbluh M 2010 Nature Photon. 4 58
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[1] Argyris A, Syvridis D, Larger L, Annovazzi-Lodi V, Colet P, García-Ojalvo J, Mirasso C R, Pesquera L, Shore K A 2005 Nature 437 343
[2] Li X F, Pan W, Ma D, Luo B, Zhang W L, Xiong Y 2006 Acta Phys. Sin. 55 5094 (in Chinese) [李孝峰、潘 伟、马 冬、罗 斌、张伟利、熊 悦 2006 55 5094]
[3] Liu H J, Feng J C 2009 Acta Phys. Sin. 58 1484 (in Chinese) [刘慧杰、冯久超 2009 58 1484]
[4] Yan S L 2008 Acta Phys. Sin. 57 6878 (in Chinese) [颜森林 2008 57 6878]
[5] Zhang J Z, Wang Y C, Wang A B 2008 Chin. Phys. B 17 3264
[6] Fan L, Xia G Q, Wu Z M 2009 Acta Phys. Sin. 58 989 (in Chinese) [樊 利、夏光琼、吴正茂 2009 58 989]
[7] Xia G Q, Wu Z M, Wu J G 2005 Opt. Express 13 3445
[8] Liu J, Wu Z M, Xia G Q 2009 Opt. Express 17 12619
[9] Vicente R, Daudén J, Colet P, Toral R 2005 IEEE J. Quantum Electron. 41 541
[10] Zhang X J, Wang B J, Yang L Z, Wang A B, Guo D M, Wang Y C 2009 Acta Phys. Sin. 58 3203 (in Chinese) [张秀娟、王冰洁、杨玲珍、王安帮、郭东明、王云才 2009 58 3203]
[11] Uchida A, Amano K, Inoue M, Hirano k, Naito S, Someya H, Oowada I, Kurashige T, Shiki M, Yoshimori S, Yoshimura K, Davis P 2008 Nature Photon. 2 728
[12] Reidler I, Aviad Y, Rosenbluh M, Kanter I 2009 Phys. Rev. Lett. 103 024102
[13] Kanter I, Aviad Y, Reidler I, Cohen E, Rosenbluh M 2010 Nature Photon. 4 58
[14] Rontani D, Locquet A, Sciamanna M, Citrin D S 2007 Opt. Lettt. 32 2960
[15] Zhao Y F 2009 Acta Phys. Sin. 58 6058 (in Chinese) [赵严峰 2009 58 6058]
[16] Ortín S, Gutiérrez J M, Pesquera L, Vasquez H 2005 Physica A 351 133
[17] Wu J G, Xia G Q, Wu Z M 2009 Opt. Express 17 20124
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