New methods are proposed to characterize the spectral-temporal distribution of single photons. The presented protocols take advantage of spectral filtering, frequency entanglement between two single photons the one of interest and a reference, followed by the generalized Hong, Ou and Mandel interferometer. The measurement of the coincidence probability in these different schemes reveals the chronocyclic Wigner, the pseudo-Wigner distribution and the spectrogram at the single-photon level.
@article{arxiv.2110.03564,
title = {Spectral single photons characterization using generalized Hong, Ou and Mandel interferometry},
author = {Nicolas Fabre},
journal= {arXiv preprint arXiv:2110.03564},
year = {2022}
}