2020/07/09 by Youn Seok Lee, Mengyu Xie, Lee, Youn Seok +5 · 1 citation
Computer Science · Engineering · Physics and Astronomy · #FOS: Physical sciences #Orbital Angular Momentum in Optics #Photonic and Optical Devices #Quantum Information and Cryptography #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.2007.05095
openalex publication_date 2020/07/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We designed and implemented a novel combination of a Sagnac-interferometer\nwith a Mach-Zehnder interferometer for a source of polarization-entangled\nphotons. The new versatile configuration does not require multi-wavelength\npolarization optics, yet it performs with a good polarization quality and\nphase-stability over a wide wavelength range. We demonstrate the interferometer\nusing only standard commercial optics to experimentally realize the pulsed\ngeneration of polarization-entangled photon-pairs at wavelengths of 764nm and\n1221nm via type-I spontaneous four-wave mixing in a polarization-maintaining\nfiber. Polarization entanglement was verified by a polarization-correlation\nmeasurement with a visibility of 95.5% from raw coincidence counts and the\nviolation of the Clauser-Horne-Shimony-Holt (CHSH) inequality with\nS=2.70\±0.04. The long-term phase-stability was characterized by an Allan\ndeviation of 8^\∘ over an integration time of about 1 hour with no active\nphase-stabilization.\n