The role of narrowband filtering in improving signal-to-noise ratio of ghost imaging with thermal light background

TL;DR

This paper investigates how narrowband filtering enhances the signal-to-noise ratio in ghost imaging with thermal light, demonstrating that narrower filters improve SNR and speed of image acquisition.

Contribution

It reveals that using narrower bandwidth filters in ghost imaging with thermal light significantly improves SNR and accelerates image formation, providing practical insights for optimizing imaging systems.

Findings

Narrower filters increase SNR in ghost imaging.

Narrower filters reduce the time to reach optimal SNR.

Signal-to-noise ratio has an upper limit determined by filter bandwidth.

Abstract

In ghost imaging with narrow-band signal in thermal light background, signal arm filters bring higher value and upper limit of signal-to-noise ratio (SNR), and faster speed to reach that limit. The narrower bandwidth, the better.