Abstract

We propose and experimentally demonstrate a novel multi-channel chaos generation scheme, which can simultaneously produce multiple chaotic signals with wideband spectrum and suppressed time-delay signature (TDS). In this scheme, we introduce an external self-phase-modulated feedback (ESPMF) to improve the optical bandwidth of the initial chaos generated by a conventional external-cavity semiconductor laser (ECSL), then optical tunable filters (OTFs) are utilized to simultaneously extract three-channel chaotic outputs. The experimental results show that the proposed scheme has three main advantages. Firstly, it can simultaneously generate multiple chaotic outputs with different central wavelengths and low correlations. Secondly, the bandwidth of original ECSL-based chaos can be improved by several times, and the undesired TDS characteristics in the original chaos can be completely suppressed to an indistinguishable level (lower than 0.02). Thirdly, the bandwidths of these chaotic outputs are flexible and can be adjusted within a wide range of 20 GHz by controlling the filter bandwidths. In addition, we demonstrate an application of the proposed chaos generation scheme in random bit generation (RBG), and multi-channel high-speed random bit sequences with a total generation rate over Tb/s and NIST verified randomness are simultaneously obtained.

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

Anke Zhao, Ning Jiang, Shiqin Liu, Chenpeng Xue, Jianming Tang, and Kun Qiu
Opt. Express 27(9) 12336-12348 (2019)

Simultaneous bandwidth-enhanced and time delay signature-suppressed chaos generation in semiconductor laser subject to feedback from parallel coupling ring resonators

Ning Jiang, Yajun Wang, Anke Zhao, Shiqin Liu, Yiqun Zhang, Lu Chen, Baochuan Li, and Kun Qiu
Opt. Express 28(2) 1999-2009 (2020)

Minimal-post-processing 320-Gbps true random bit generation using physical white chaos

Anbang Wang, Longsheng Wang, Pu Li, and Yuncai Wang
Opt. Express 25(4) 3153-3164 (2017)

Numerical and experimental investigation of a dispersive optoelectronic oscillator for chaotic time-delay signature suppression

Changan Feng, Song-Sui Li, Jiangwei Li, Xihua Zou, Liyue Zhang, Lin Jiang, Longsheng Wang, Anbang Wang, Wei Pan, and Lianshan Yan
Opt. Express 31(8) 13073-13083 (2023)

Brownian motion properties of optoelectronic random bit generators based on laser chaos

Pu Li, Xiaogang Yi, Xianglian Liu, Yuncai Wang, and Yongge Wang
Opt. Express 24(14) 15822-15833 (2016)