Cross-spectral purity: a generalization of spatiotemporal separability
Optics
2025-03-28 v2
Abstract
We study the connection between cross-spectral purity and spatiotemporal separability of nonstationary (pulsed) scalar fields. It is found that in the case of complete coherence, there is a two-way relation between global cross-spectral purity and spatiotemporal separability of the field. Moreover, we show that cross-spectral purity generalizes the notion of spatiotemporal separability to partially coherent fields, due to the separability of the correlation functions. We also briefly discuss simple self-referencing linear measurement methods that can reveal cross-spectral purity.
Keywords
Cite
@article{arxiv.2412.07417,
title = {Cross-spectral purity: a generalization of spatiotemporal separability},
author = {Matias Koivurova and Rajneesh Joshi},
journal= {arXiv preprint arXiv:2412.07417},
year = {2025}
}