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Mapping synchronization properties in a three-element laterally coupled laser array.

Qi Fang, Pei Zhou, Nianqiang Li

|October 12, 2022

Summary

This summary is machine-generated.

This study numerically investigates synchronized chaos and spatiotemporal chaos in laser arrays. Purely real index guiding structures offer wider parameter spaces for distinct chaos boundaries, enabling parallel random bit generation.

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Area of Science:

Optics and Photonics
Nonlinear Dynamics
Laser Physics

Background:

Laterally-coupled laser arrays exhibit complex spatiotemporal dynamics.
Understanding synchronized chaos (SC) and spatiotemporal chaos (STC) is crucial for advanced photonic applications.

Purpose of the Study:

To numerically investigate SC and STC in a three-element laterally-coupled laser array.
To identify parameter spaces governing SC, STC, and non-chaotic regimes.
To explore the potential for parallel random bit generation (PRBG) using these chaotic states.

Main Methods:

Numerical simulation of coupled rate equations for the laser array.
Generation of spatiotemporal dynamic maps to visualize parameter spaces.
Analysis of key parameters: laser separation ratio, pump rate, linewidth enhancement factor, and frequency detuning.

Main Results:

Key parameters significantly influence array dynamics and synchronization properties.
Purely real index guiding structures demonstrate clearer SC/STC boundaries over a broader parameter range compared to other guiding types.
Two distinct PRBG scenarios are achievable using SC and STC states.

Conclusions:

The study provides a comprehensive analysis of collective dynamics in three-element coupled laser arrays.
Real index guiding offers advantages for controlling chaos dynamics and enabling PRBG.
The findings pave the way for novel PRBG applications based on laser arrays.