Ghost spectroscopy with classical correlated amplified spontaneous emission photons emitted by an erbium-doped fiber amplifier

TL;DR

This paper demonstrates classical wavelength correlations from an erbium-doped fiber amplifier's ASE photons and applies them in ghost spectroscopy to identify acetylene's absorption features, suggesting practical applications in various scientific fields.

Contribution

It introduces the use of ASE photons from an EDFA as a classical correlated light source for ghost spectroscopy, expanding the technique's applicability.

Findings

Successful demonstration of wavelength-wavelength correlations in ASE photons.

Reproduction of acetylene absorption features using ghost spectroscopy.

Potential for practical applications in chemistry, physics, and engineering.

Abstract

We demonstrate wavelength-wavelength correlations of classical broad-band amplified spontaneous emission (ASE) photons emitted by an erbium-doped fiber amplifier (EDFA) in a wavelength regime around 1530nm. We then apply these classical correlated photons in the framework of a real-world ghost spectroscopy experiment at a wavelength of 1533nm to acetylene (C2H2) reproducing the characteristic absorption features of the C-H stretch and rotational bands. This proof-of-principle experiment confirms the generalization of an ASE source concept offering an attractive light source for classical ghost spectroscopy. It is expected that this will enable further disseminating ghost modality schemes by exploiting classical correlated photons towards applications in chemistry, physics and engineering.