High fidelity field stop collection for polarization-entangled photon pair sources

Abstract

We present an experimental demonstration of a bright and high fidelity polarization entangled photon pair source. The source is constructed using two critically phase matched $\beta$-Barium Borate crystals with parallel optical axes and photon pairs are collected after filtering with a circular field-stop. Near unity fidelities are obtained with detected pair rates exceeding \SI{100000}{pairs/\s/\mW} approaching the brightness of practical quasi-phase matched entangled photon sources. We find that the brightness scales linearly with the crystal length. We present models supporting the experimental data and propose strategies for further improvement. The source design is a promising candidate for emerging quantum applications outside of laboratory environments.

References in corpus (10)

• Quantum entanglement
• Quantum Communication
• Ultra-bright source of polarization-entangled photons
• Phase-stable source of polarization-entangled photons using a polarization Sagnac interferometer
• Distribution of high-dimensional entanglement via an intra-city free-space link
• A high-brightness source of polarization-entangled photons optimized for applications in free space
• Collinear source of polarization-entangled photon pairs at non-degenerate wavelengths
• Phase-stable source of polarization-entangled photons in a linear double-pass configuration
• Experimental entangled photon pair generation using crystals with parallel optical axes
• Accurate relative-phase and time-delay maps all over the emission cone of hyperentangled photon source

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