2018/03/31 by Alexander Lohrmann, Aitor Villar, Arian Stolk +1
Biochemistry, Genetics and Molecular Biology · Chemistry · Computer Science · Physics and Astronomy · #Advanced Fluorescence Microscopy Techniques #Chemistry #Computer science #Fidelity #Field (mathematics) #Optics #Orbital Angular Momentum in Optics #Photon #Photon entanglement #Physics #Polarization (electrochemistry) #Quantum #Quantum Information and Cryptography #Quantum entanglement #Quantum mechanics #Telecommunications #quant-ph
paper · pdf · doi:10.1063/1.5046962
openalex publication_date 2018/10/22 · arxiv created 2018/10/25 · arxiv updated 2018/11/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 β-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 100 000 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.