All-Fiber Source and Sorter for Multimode Correlated Photons

TL;DR

This paper demonstrates an all-fiber system for generating and sorting multimode correlated photons, advancing high-dimensional quantum communication using standard fibers and integrated fiber components.

Contribution

It introduces an all-fiber source and mode sorter for multimode photon pairs, enabling practical high-dimensional quantum protocols with existing fiber technology.

Findings

Multimode photon pairs generated via spontaneous four-wave mixing

All-fiber mode sorter effectively identifies fiber modes

System suitable for high-dimensional quantum communication

Abstract

Photons occupying multiple spatial modes hold a great promise for implementing high-dimensional quantum communication. We use spontaneous four-wave mixing to generate multimode photon pairs in a few mode fiber. We show the photons are correlated in the fiber mode basis using an all-fiber mode sorter. Our demonstration offers an essential building block for realizing high-dimensional quantum protocols based on standard, commercially available fibers, in an all-fiber configuration.