Directly modulated semiconductor ring lasers: Chaos synchronization and applications to cryptography communications

Year 2020, Volume: 2 Issue: 1, 31 - 39, 30.06.2020

Sifeu T. Kingni , Cyrille Ainamon Victor Kamdoum Jean Chabı Orou

Abstract

This paper numerically investigates the synchronization and the chaos-based encryption using unidirectional coupled chaotic semiconductor ring lasers (SRLs) with direct modulation. A good quality of synchronization and transmission of messages are realized for specific choice of system parameters. The mismatches of typical internal SRLs parameters have an influence on the quality of synchronization. While the communication performance of the system has a good robustness to the mismatches of typical internal SRLs parameters. Finally, the encrypted message can be recorvered without using any filter.

Keywords

Chaos, Chaos synchronization, Chaos-based communications, Chaos modulation technique

Thanks

Sifeu Takougang Kingni thanks Professor Jan Danckaert (APHY, Vrije Universiteit Brussel, Belgium), Professor Guy Van der Sande (APHY, Vrije Universiteit Brussel, Belgium) and Professor Paul Woafo (LaMSEBP, University of Yaoundé I, Cameroon) for interesting discussions.

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