Bidirectional Chaotic Synchronization Communication of Closed-Loop Mutually Coupled Nano-Lasers

Abstract

It is well known that the dynamical characteristics of nano-lasers (NLs) have been extensively studied, but there is limited research on chaotic synchronization communication. In this paper, we propose a closed-loop system of mutually coupled NLs. Firstly, the autocorrelation function is employed to evaluate the capability of the system to conceal the time-delayed signature (TDS), and then, based on this, we specifically analyze the effects of the injection strength, frequency detuning, and parameter mismatch of two NLs on the chaotic synchronization performance, as well as the bidirectional communication. The detailed studies indicate that the proposed closed-loop mutually coupled system based on NLs can achieve high-quality chaotic synchronization with a low TDS and large bandwidth. In addition, the system maintains high-quality chaotic synchronization and communication performance even under significant parameter mismatch.

Concealment of Chaos Time Delay Signature in a Ring Network With Heterogeneous Delays Based on Nano-Lasers

“…With the exposure of information security issues, there has been widespread concern about the enhancement of security in optical communication systems. It is well known that optical chaos sources are an ideal choice for chaotic secure communication [1][2][3] and physical random number generators [4][5][6]. Among others, the generation of chaotic laser signals can be generated through a variety of methods, broadly categorized as optical feedback [7], optical injection [8], optoelectronic feedback [9], and current modulation [10], etc.…”