Low-noise frequency conversion of single photons is a critical tool in establishing fibre-based quantum networks. We show that a single photonic crystal fibre can achieve frequency conversion by Bragg-scattering four-wave mixing of source photons from an ultra-broad wavelength range by engineering a symmetric group velocity profile. Furthermore, we discuss how pump tuning can mitigate realistic discrepancies in device fabrication. This enables a single highly adaptable frequency conversion interface to link disparate nodes in a quantum network via the telecoms band.
@article{arxiv.2103.04824,
title = {Group-velocity symmetry in photonic crystal fibre for ultra-tunable quantum frequency conversion},
author = {Charlotte Parry and Philip B. Main and Thomas A. Wright and Peter J. Mosley},
journal= {arXiv preprint arXiv:2103.04824},
year = {2021}
}