High degree of chaos synchronization of a single pair of transverse modes with different polarizations in vector lasers subjected to self-mixing modulation

TL;DR

This paper demonstrates high-degree chaos synchronization between a pair of orthogonally polarized transverse modes in a vector laser, driven by self-mixing modulation, with experimental and simulated validation.

Contribution

It reveals the mechanism of chaos synchronization between coupled laser modes with different polarizations under self-mixing modulation, supported by experimental and simulation results.

Findings

Chaos synchronization occurs between orthogonally polarized modes.

Self-mixing modulation transfers chaotic signals from sender to receiver mode.

Experimental results align with the coupled mode model simulations.

Abstract

Synchronization of chaos among a single pair of transverse modes featuring intermode dynamical non-independence, resulting from cross-saturation of modal population inversions and coherent modal field coupling, is explored in a thin-slice solid-state laser with coupled orthogonally polarized transverse modes operating in quasi-locked states. The chaotic signals that are created in one of the pairing modes (sender) by self-mixing modulations are shown to be transferred solely to the partner mode (receiver) among all the other modal fields with different polarizations. The experimental results are reproduced in a simulation of a model equation of coupled laser modes subjected to self-mixing modulations.