[1] [1] Lang R, Kobayashi K. External optical feedback effects on semiconductor injection laser properties［J］. IEEE Journal of Quantum Electronics, 1980,16(3): 347-355.

[2] [2] Simpson T B, Liu J M, Gavrielides A, et al. Period doubling route to chaos in a semiconductor laser subject to optical injection［J］. Applied Physics Letters, 1994, 64(26): 3539-3541.

[3] [3] Tang S, Liu J M. Chaotic pulsing and quasi-periodic route to chaos in a semiconductor laser with delayed opto-electronic feedback［J］. IEEE Journal of Quantum Electronics, 2001, 37(3): 329-336.

[4] [4] Argyris A, Syvridis D, Larger L, et al. Chaos-based communications at high bit rates using commercial fibre-optic links［J］. Nature, 2005, 438(7066): 343-346.

[5] [5] Uchida A, Amano K, Inoue M, et al. Fast physical random bit generation with chaotic semiconductor lasers［J］. Nature Photonics, 2008, 2(12): 728-732.

[6] [6] Reidler I, Aviad Y, Rosenbluh M, et al. Ultrahigh-speed random number generation based on a chaotic semiconductor laser［J］. Physical Review Letters, 2009, 103(2): 024102.

[7] [7] Li Pu, Wang Yuncai. Research progress in physical random number generator based on laser chaos for high-speed secure communication［J］. Laser & Optoelectronics Progress, 2014, 51(6): 060002.

[8] [8] Zhao Q C, Wang Y C, Wang A B. Eavesdropping in chaotic optical communication using the feedback length of an external-cavity laser as a key［J］. Applied Optics, 2009, 48(18): 3515-3520.

[9] [9] Udaltsov V S, Goedgebuer J P, Larger L, et al. Cracking chaos-based encryption systems ruled by nonlinear time delay differential equations［J］. Physics Letters A, 2003, 308(1): 54-60.

[10] [10] Zhang Jibing, Zhang Jianzhong, Yang Yibiao, et al. Randomness analysis of external cavity semiconductor laser as entropy source［J］. Acta Physica Sinica, 2010, 59(11): 7679-7685.

[11] [11] Uchida A, Heil T, Liu Y, et al. High-frequency broad-band signal generation using a semiconductor laser with a chaotic optical injection［J］. IEEE Journal of Quantum Electronics, 2003, 39(11): 1462-1467.

[12] [12] Wang A B, Wang Y C, Wang J F. Route to broadband chaos in a chaotic laser diode subject to optical injection［J］. Optics Letters, 2009, 34(8): 1144-1146.

[13] [13] Wang A B, Wang Y C, He H C. Enhancing the bandwidth of the optical chaotic signal generated by a semiconductor laser with optical feedback［J］. IEEE Photonics Technology Letters, 2008, 20(19): 1633-1635.

[14] [14] Rontani D, Locquet A, Sciamanna M, et al. Loss of time-delay signature in the chaotic output of a semiconductor laser with optical feedback［J］. Optics Letters, 2007, 32(20): 2960-2962.

[15] [15] Priyadarshi S, Hong Y H, Pierce I, et al. Experimental investigations of time-delay signature concealment in chaotic external cavity VCSELs subject to variable optical polarization-angle of feedback［J］. IEEE Journal of Selected Topics in Quantum Electronics, 2013, 19(4): 2557-2559.

[16] [16] Yang X J, Wu J G, Wu Z M, et al. Time-delay signatures hidden in the phase of chaotic output of mutually delay-coupled vertical-cavity surface-emitting lasers［J］. Optics Communications, 2015, 336: 262-268.

[17] [17] Sun Weiyang, Zhang Shenghai, Wu Tianan, et al. Time delay signature concealment in chaotic semiconductor lasers with double optical feedback and dual-path injection［J］. Laser ＆ Optoelectronics Progress, 2016, 53(12): 121406.

[18] [18] Yang L, Pan W, Yan L S, et al. Loss of time-delay signature in a ring of three unidirectionally coupled semiconductor lasers［J］. Chinese Optics Letters, 2015, 13(4): 041403.

[19] [19] Xue C P, Jiang N, Lü Y X, et al. Time delay signature concealment of chaotic semiconductor laser subject to nonlinear feedback［J］. Chinese Optics Letters, 2016, 14(9): 091404.

[20] [20] Wang Yuncai, Zhang Gengwei, Wang Anbang, et al. Bandwidth enhancement of semiconductor laser as a chaotic transmitter by external light injection［J］. Acta Physica Sinica, 2007, 56(8): 4372-4377.

[21] [21] Li N Q, Pan W, Xiang S Y, et al. Photonic generation of wideband time-delay-signature-eliminated chaotic signals utilizing an optically injected semiconductor laser［J］. IEEE Journal of Quantum Electronics, 2012, 48(10): 1339-1345.

[22] [22] Li N Q, Pan W, Xiang S Y, et al. Loss of time delay signature in broadband cascade-coupled semiconductor lasers［J］. IEEE Photonics Technology Letters, 2012, 24(23): 2187-2190.

[23] [23] Liu H J, Li N Q, Zhao Q C. Photonic generation of polarization-resolved wideband chaos with time-delay concealment in three-cascaded vertical-cavity surface-emitting lasers［J］. Applied Optics, 2015, 54(14): 4380-4387.

[24] [24] Hong Y H, Quirce A, Wang B J, et al. Concealment of chaos time-delay signature in three-cascaded vertical-cavity surface-emitting lasers［J］. IEEE Journal of Quantum Electronics, 2016, 52(8): 16128864.

[25] [25] Yang Xianjie, Chen Jianjun, Xia Guangqiong, et al. Analyses of the time-delay signature and bandwidth of the chaotic output from a master-slave vertical-cavity surface-emitting laser dynamical system［J］. Acta Physica Sinica, 2015, 64(22): 0224213.

[26] [26] Hong Y, Spencer P S, Shore K A. Wideband chaos with time-delay concealment in vertical-cavity surface-emitting lasers with optical feedback and injection［J］. IEEE Journal of Quantum Electronics, 2014, 50(4): 236-242.

[27] [27] Martin-Regalado J, Prati F, San Miguel M, et al. Polarization properties of vertical-cavity surface-emitting lasers［J］. IEEE Journal of Quantum Electronics, 1997, 33(5): 765-783.

[28] [28] San M M, Feng Q, Moloney J V. Light-polarization dynamics in surface-emitting semiconductor lasers［J］. Physical Review A, 1995, 52(2): 1728-1739.

[29] [29] Vicente R, Mirasso C R. Dynamics of mutually coupled VCSELs［J］. SPIE, 2004, 5349: 331-338.

[30] [30] Zhong Z Q, Wu Z M, Wu J G, et al. Time-delay signature suppression of polarization-resolved chaos outputs from two mutually coupled VCSELs［J］. IEEE Photonics Journal, 2013, 5(2): 1500409.

[31] [31] Wu T A, Sun W Y, Zhang X X, et al. Concealment of time delay signature of chaotic output in a slave semiconductor laser with chaos laser injection［J］. Optics Communications, 2016, 381: 174-179.