Related Experiment Video
Updated: Jul 1, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Distribution of polarization-entangled photonpairs produced via spontaneous parametric down-conversion within a
Han Chuen Lim1, Akio Yoshizawa, Hidemi Tsuchida
1Graduate School of Engineering, The University of Tokyo, Tokyo, Japan. hanchuen@ginjo.t.u-tokyo.ac.jp
Abstract:
We present a theoretical model for the distribution of polarization-entangled photon-pairs produced via spontaneous parametric down-conversion within a local-area fiber network. This model allows an entanglement distributor who plays the role of a service provider to determine the photon-pair generation rate giving highest two-photon interference fringe visibility for any pair of users, when given user-specific parameters. Usefulness of this model is illustrated in an example and confirmed in an experiment, where polarization-entangled photon-pairs are distributed over 82 km and 132 km of dispersion-managed optical fiber. Experimentally observed visibilities and entanglement fidelities are in good agreement with theoretically predicted values.
More Related Videos
Related Concept Videos
Potential Due to a Polarized Object
Group Polarization

