Knowing the properties of the single photons produced in a Spontaneous Parametric Down-Conversion (SPDC) source can be crucial for specific applications and uses. In particular, the spectral properties are of key relevance. Here, we investigate a commercial SPDC source using our fast broadband spectrometer. Our analysis is a valid method for other SPDC sources, as well as other single-photon generation techniques, thus providing a good example of how to use this spectrometer design. We calibrate the spectrometer using known lines of the argon emission spectrum. We show that the two down-converted photons from the SPDC source have different spectral properties depending on the pump power, and in which condition we measured spectrally similar down-converted photons. Lastly, we were able to reconstruct and investigate the spectral information for the pump photon.
@article{arxiv.2307.06843,
title = {Spectral characterization of a SPDC source with a fast broadband spectrometer},
author = {Brianna Farella and Gregory Medwig and Raphael A. Abrahao and Andrei Nomerotski},
journal= {arXiv preprint arXiv:2307.06843},
year = {2023}
}