中国物理B ›› 2021, Vol. 30 ›› Issue (1): 14203-.doi: 10.1088/1674-1056/abb228

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  • 收稿日期:2020-05-31 修回日期:2020-07-05 接受日期:2020-08-25 出版日期:2020-12-17 发布日期:2021-01-13

Random-injection-based two-channel chaos with enhanced bandwidth and suppressed time-delay signature by mutually coupled lasers: Proposal and numerical analysis

Shi-Rong Xu(许世蓉), Xin-Hong Jia (贾新鸿)†, Hui-Liang Ma(马辉亮), Jia-Bing Lin(林佳兵), Wen-Yan Liang(梁文燕), and Yu-Lian Yang(杨玉莲)   

  1. College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610101, China
  • Received:2020-05-31 Revised:2020-07-05 Accepted:2020-08-25 Online:2020-12-17 Published:2021-01-13
  • Contact: †Corresponding author. E-mail: jiaxh_0@126.com
  • Supported by:
    Project supported by the Sichuan Science and Technology Program, China (Grant No. 2019YJ0530), the Scientific Research Fund of Sichuan Provincial Education Department, China (Grant No. 18ZA0401), the Innovative Training Program for College Student of Sichuan Normal University, China (Grant No. S20191063609), and the National Natural Science Foundation of China (Grant No. 61205079).

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Abstract: Simultaneous bandwidth (BW) enhancement and time-delay signature (TDS) suppression of chaotic lasing over a wide range of parameters by mutually coupled semiconductor lasers (MCSLs) with random optical injection are proposed and numerically investigated. The influences of system parameters on TDS suppression (characterized by autocorrelation function (ACF) and permutation entropy (PE) around characteristic time) and chaos BW are investigated. The results show that, with the increasing bias current, the ranges of parameters (detuning and injection strength) for the larger BW (> 20 GHz) are broadened considerably, while the parameter range for optimized TDS (< 0.1) is not shrunk obviously. Under optimized parameters, the system can simultaneously achieve two chaos outputs with enhanced BW (>20 GHz) and perfect TDS suppression. In addition, the system can generate two-channel high-speed truly physical random number sequences at 200 Gbits/s for each channel.

Key words: random distributed feedback-based optical injection, two-channel chaos lasing, bandwidth enhancement and time-delay signature suppression, physical random number generation

中图分类号:  (Semiconductor lasers; laser diodes)

  • 42.55.Px
42.55.Zz (Random lasers) 42.81.-i (Fiber optics)