Stable isochronal synchronization of mutually coupled chaotic lasers

TL;DR

This paper demonstrates that adding self feedback to mutually coupled chaotic diode lasers enables stable isochronal synchronization, which is crucial for secure optical cryptographic systems, supported by experimental and numerical analysis.

Contribution

It introduces a method to achieve stable isochronal synchronization in mutually coupled chaotic lasers through self feedback, advancing secure optical communication technology.

Findings

Stable isochronal synchronization achieved with self feedback.

Experimental results align with rate equation models.

Potential application in optical cryptography systems.

Abstract

The dynamics of two mutually coupled chaotic diode lasers are investigated experimentally and numerically. By adding self feedback to each laser, stable isochronal synchronization is established. This stability, which can be achieved for symmetric operation, is essential for constructing an optical public-channel cryptographic system. The experimental results on diode lasers are well described by rate equations of coupled single mode lasers.