Speckled-speckle field as a resource for imaging techniques

TL;DR

This paper investigates speckled-speckle fields generated by two diffusers, analyzing their potential advantages and limitations for imaging techniques compared to traditional pseudo-thermal light, through simulations and experiments.

Contribution

It introduces and characterizes speckled-speckle fields with two diffusers, providing insights into their correlation properties and imaging performance.

Findings

Speckled-speckle fields exhibit higher correlation levels.

They offer some advantages in contrast and resolution.

They do not outperform pseudo-thermal light in key metrics.

Abstract

Correlated states of light, both classical and quantum, can find useful applications in the implementation of several imaging techniques. Among the employed sources, pseudo-thermal states, generated by the passage of a laser beam through a diffuser, represent the standard choice. To produce light with a higher level of correlation, in this work we consider and characterize the speckled-speckle field obtained with two diffusers using both a numerical simulation and an experimental implementation. In order to discuss the potential usefulness of super-thermal light in imaging protocols, we analyze the behavior of some figures of merit, namely the contrast, the signal-to-noise ratio and the image resolution. The obtained results clarify the possible advantages offered by this kind of light, and at the same time better emphasize the reasons why it does not outperform pseudo-thermal light.