Chaos synchronization and communication in closed-loop semiconductor lasers subject to common chaotic phase-modulated feedback

Security-enhanced chaotic communications with optical temporal encryption based on phase modulation and phase-to-intensity conversion

“…6(b) shows the comparison of mismatch robustness properties between the proposed system and the conventional system. The mismatch is introduced using the method reported in [29,30]. The results indicate that the OTE and OTD processes in the proposed system do not induce obvious mismatch robustness degradation with respect to that in the conventional systems.…”

Suppression of Cavity Time-Delay Signature Using Noise-Phase-Modulated Feedback

“…As a common method of quantifying the time-delaysignature, the auto-correlation function (ACF) is calculated. The ACF measures how well the time series matches its time-shifted replica, which is defined as [18], [21]…”

“…Lavrov et al reported delayed electo-optic phase modulation feedback and realized 10Gb/s transmission of a message hidden in chaos [20]. Jiang et al used common chaotic phase-modulated optical feedback as an external-cavity structure to improve the communications performance [21].…”

“…It was shown that the security of transmission arises partly from the complication of the driving signal of phase modulator, since any small difference from the authorized scheme prevents unauthorized attacks from decrypting the transmitted messages [22]. Also, the weak correlation between driving chaos synchronization signals and transmission carriers can improve the security performance in chaos communication, since such weaker correlation inhibits eavesdroppers illegal attacks from replicating the scheme of communication [21].…”

Wideband complex-enhanced chaos generation using a semiconductor laser subject to delay-interfered self-phase-modulated feedback

“…All-optical chaos generation based on external-cavity semiconductor lasers (ECSLs) has drawn great attention because of its potential applications in secure optical communications [1][2][3][4][5][6], true random bit generation (RBG) [7][8][9][10][11][12][13][14][15] and chaotic radar [16,17]. Since in conventional ECSLbased chaos generation systems, chaotic intensity oscillation is often dominated by the intrinsic relaxation oscillation of the laser, in the radio frequency (RF) spectrum of the chaotic signal, the majority of the energy is thus concentrated in the vicinity of the relaxation oscillation frequency.…”