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Updated: May 15, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Experimental wavelength-division-multiplexed photon-pair distribution.

Joe Ghalbouni¹, Imad Agha, Robert Frey

¹Institut Télécom/Télécom Paristech, CNRS-LTCI 46 rue Barrault, Paris 75013, France.

|January 4, 2013

Summary

This summary is machine-generated.

We distributed photon pairs from spontaneous parametric downconversion using dense-wavelength-division-multiplexing filters. This allowed us to measure maximum fringe visibility for polarization-entangled photons and compare filter technologies.

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Area of Science:

Quantum optics
Photonics

Background:

Spontaneous parametric downconversion (SPDC) is a key source of entangled photon pairs.
Dense-wavelength-division-multiplexing (DWDM) filters are crucial for managing optical signals in telecommunication wavelengths.

Purpose of the Study:

To experimentally implement the distribution of SPDC-generated photon pairs through DWDM filters.
To evaluate the maximum fringe visibility achievable with polarization-entangled photons.
To compare the performance of different DWDM filter technologies in this context.

Main Methods:

Experimental setup utilizing SPDC to generate photon pairs.
Distribution of photon pairs through telecom DWDM filters.
Measurement of photon counts and coincidences between symmetric channels.

Main Results:

Successful implementation of photon pair distribution via DWDM filters.
Quantification of maximum fringe visibility for polarization-entangled photons.
Comparative analysis of different filter technologies based on measured visibility.

Conclusions:

DWDM filters can be effectively used for distributing entangled photon pairs.
The choice of filter technology impacts the achievable fringe visibility.
This work provides insights for quantum communication systems utilizing entangled photons and wavelength multiplexing.