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Optical Review

, Volume 25, Issue 3, pp 356–364 | Cite as

Complex-enhanced chaotic signals with time-delay signature suppression based on vertical-cavity surface-emitting lasers subject to chaotic optical injection

  • Jianjun Chen
  • Yingni Duan
  • Zhuqiang Zhong
Regular Paper
  • 76 Downloads

Abstract

A chaotic system is constructed on the basis of vertical-cavity surface-emitting lasers (VCSELs), where a slave VCSEL subject to chaotic optical injection (COI) from a master VCSEL with the external feedback. The complex degree (CD) and time-delay signature (TDS) of chaotic signals generated by this chaotic system are investigated numerically via permutation entropy (PE) and self-correlation function (SF) methods, respectively. The results show that, compared with master VCSEL subject to optical feedback, complex-enhanced chaotic signals with TDS suppression can be achieved for S-VCSEL subject to COI. Meanwhile, the influences of several controllable parameters on the evolution maps of CD of chaotic signals are carefully considered. It is shown that the CD of chaotic signals for S-VCSEL is always higher than that for M-VCSEL due to the CIO effect. The TDS of chaotic signals can be significantly suppressed by choosing the reasonable parameters in this system. Furthermore, TDS suppression and high CD chaos can be obtained simultaneously in the specific parameter ranges. The results confirm that this chaotic system may effectively improve the security of a chaos-based communication scheme.

Keywords

Vertical-cavity surface-emitting lasers (VCSELs) Chaotic optical injection Complex degree Time-delay signature 

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China under Grant No. 31760269 and the Scientific Research Project of Colleges in Xinjiang under Grant No. XJEDU2016S057.

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Copyright information

© The Optical Society of Japan 2018

Authors and Affiliations

  1. 1.School of Medical Engineering and TechnologyXinjiang Medical UniversityUrumqiChina
  2. 2.School of ScienceChongqing University of TechnologyChongqingChina

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