中国物理B ›› 2021, Vol. 30 ›› Issue (12): 120513-120513.doi: 10.1088/1674-1056/ac322a

所属专题： SPECIAL TOPIC — Interdisciplinary physics: Complex network dynamics and emerging technologies

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Sensitivity to external optical feedback of circular-side hexagonal resonator microcavity laser

Tong Zhao(赵彤)1,2,†, Zhi-Ru Shen(申志儒)1,2, Wen-Li Xie(谢文丽)1,2, Yan-Qiang Guo(郭龑强)1,2, An-Bang Wang(王安帮)1,2,3, and Yun-Cai Wang(王云才)3,4,†   

  1. 1 Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China;
    2 College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China;
    3 Guangdong Provincial Key Laboratory of Photonics Information Technology, Guangzhou 510006, China;
    4 School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China
  • 收稿日期:2021-07-21 修回日期:2021-10-02 接受日期:2021-10-22 出版日期:2021-11-15 发布日期:2021-11-23
  • 通讯作者: Tong Zhao, Yun-Cai Wang E-mail:zhaotong.tyut@outlook.com;wangyc@gdut.edu.cn
  • 基金资助:
    Project supported by the National Key Research and Development Program of China (Grant No. 2019YFB1803500), the National Natural Science Foundation of China (Grant Nos. 61705160, 61961136002, 61822509, and 61875147), the "1331 Project" Key Innovative Research Team of Shanxi Province, China, and the National Defense Basic Scientific Research Project (Grant No. WDYX19614260203).

Sensitivity to external optical feedback of circular-side hexagonal resonator microcavity laser

Tong Zhao(赵彤)1,2,†, Zhi-Ru Shen(申志儒)1,2, Wen-Li Xie(谢文丽)1,2, Yan-Qiang Guo(郭龑强)1,2, An-Bang Wang(王安帮)1,2,3, and Yun-Cai Wang(王云才)3,4,†   

  1. 1 Key Laboratory of Advanced Transducers and Intelligent Control System, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China;
    2 College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China;
    3 Guangdong Provincial Key Laboratory of Photonics Information Technology, Guangzhou 510006, China;
    4 School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China
  • Received:2021-07-21 Revised:2021-10-02 Accepted:2021-10-22 Online:2021-11-15 Published:2021-11-23
  • Contact: Tong Zhao, Yun-Cai Wang E-mail:zhaotong.tyut@outlook.com;wangyc@gdut.edu.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant No. 2019YFB1803500), the National Natural Science Foundation of China (Grant Nos. 61705160, 61961136002, 61822509, and 61875147), the "1331 Project" Key Innovative Research Team of Shanxi Province, China, and the National Defense Basic Scientific Research Project (Grant No. WDYX19614260203).

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摘要： The sensitivity to fault reflection is very important for larger dynamic range in fiber fault detection technique. Using time delay signature (TDS) of chaotic laser formed by optical feedback can solve the sensitivity limitation of photodetector in fiber fault detection. The TDS corresponds to the feedback position and the fault reflection can be detected by the laser diode. The sensitivity to feedback level of circular-side hexagonal resonator (CSHR) microcavity laser is numerically simulated and the feedback level boundaries of each output dynamic state are demonstrated. The peak level of TDS is utilized to analyze the sensitivity. The demonstration is presented in two aspects:the minimum feedback level when the TDS emerges and the variation degree of TDS level on feedback level changing. The results show that the CSHR microcavity laser can respond to the feedback level of 0.07%, corresponding to -63-dB feedback strength. Compared to conventional distributed feedback laser, the sensitivity improves almost 20 dB due to the shorter internal cavity length of CSHR microcavity laser. Moreover, 1% feedback level changing will induce 1.001 variation on TDS level, and this variation degree can be influenced by other critical internal parameters (active region side length, damping rate, and linewidth enhancement factor).

关键词: sensitivity, optical feedback, microcavity laser, nonlinear dynamic

Abstract: The sensitivity to fault reflection is very important for larger dynamic range in fiber fault detection technique. Using time delay signature (TDS) of chaotic laser formed by optical feedback can solve the sensitivity limitation of photodetector in fiber fault detection. The TDS corresponds to the feedback position and the fault reflection can be detected by the laser diode. The sensitivity to feedback level of circular-side hexagonal resonator (CSHR) microcavity laser is numerically simulated and the feedback level boundaries of each output dynamic state are demonstrated. The peak level of TDS is utilized to analyze the sensitivity. The demonstration is presented in two aspects:the minimum feedback level when the TDS emerges and the variation degree of TDS level on feedback level changing. The results show that the CSHR microcavity laser can respond to the feedback level of 0.07%, corresponding to -63-dB feedback strength. Compared to conventional distributed feedback laser, the sensitivity improves almost 20 dB due to the shorter internal cavity length of CSHR microcavity laser. Moreover, 1% feedback level changing will induce 1.001 variation on TDS level, and this variation degree can be influenced by other critical internal parameters (active region side length, damping rate, and linewidth enhancement factor).

Key words: sensitivity, optical feedback, microcavity laser, nonlinear dynamic

中图分类号:  (Nonlinear dynamics and chaos)

  • 05.45.-a
05.45.Pq (Numerical simulations of chaotic systems) 05.45.Tp (Time series analysis) 06.30.-k (Measurements common to several branches of physics and astronomy)