Fluctuations of radiation from a chaotic laser below threshold

TL;DR

This paper investigates the spectral distribution and fluctuations of radiation emitted from a chaotic laser cavity below threshold, revealing how interactions between photons and gain medium influence noise characteristics.

Contribution

It introduces a set of coupled equations for photon density and gain medium population, providing new insights into noise suppression mechanisms in chaotic laser systems.

Findings

Spectral distribution of radiation characterized

Fluctuations show competition between positive and negative correlations

Pronounced suppression of photonic noise observed

Abstract

Radiation from a chaotic cavity filled with gain medium is considered. A set of coupled equations describing the photon density and the population of gain medium is proposed and solved. The spectral distribution and fluctuations of the radiation are found. The full noise is a result of a competition between positive correlations of photons with equal frequencies (due to stimulated emission and chaotic scattering) which increase fluctuations, and a suppression due to interaction with a gain medium which leads to negative correlations between photons. The latter effect is responsible for a pronounced suppression of the photonic noise as compared to the linear theory predictions.