Nth-order nonlinear intensity fluctuation amplifier

TL;DR

This paper introduces an Nth-order nonlinear intensity fluctuation amplifier based on four-wave mixing, revealing its amplification mechanism through theoretical and experimental analysis, and highlighting its potential applications in enhancing light intensity fluctuations.

Contribution

It proposes a novel Nth-order fluctuation amplifier utilizing four-wave mixing with different statistical distributions, and elucidates its amplification mechanism both theoretically and experimentally.

Findings

Amplification depends on statistical distribution ratio R and coherence g^{(2)}(0).

Fluctuating incident light fields and nonlinear coefficient contribute to amplification.

Potential application to other N-order nonlinear optical effects.

Abstract

Stronger light intensity fluctuations are pursued by related applications such as optical resolution, image enhancement, and beam positioning. In this paper, an Nth-order light intensity fluctuation amplifier is proposed, which was demonstrated by a four-wave mixing process with different statistical distribution coupling lights. Firstly, its amplification mechanism is revealed both theoretically and experimentally. The ratio $R$ of statistical distributions and the degree of second-order coherence ${g^{(2)}}(0)$ of beams are used to characterize the affected modulations and the increased light intensity fluctuations through the four-wave mixing process. The results show that the amplification of light intensity fluctuations is caused by not only the fluctuating light fields of incident coupling beams, but also the fluctuating nonlinear coefficient of interaction. At last, we highlight the potentiality of applying such amplifier to other N-order nonlinear optical effects.