Post-selection free, integrated optical source of non-degenerate, polarization entangled photon pairs

Abstract

We present an integrated source of polarization entangled photon pairs in the telecom regime, which is based on type II-phasematched parametric down-conversion (PDC) in a Ti-indiffused waveguide in periodically poled lithium niobate. The domain grating -- consisting of an interlaced bi-periodic structure -- is engineered to provide simultaneous phase-matching of two PDC processes, and enables the direct generation of non-degenerate, polarization entangled photon pairs with a brightness of $B=7\times 10^3$ pairs/(s mW GHz). The spatial separation of the photon pairs is accomplished by a fiber-optical multiplexer facilitating a high compactness of the overall source. Visibilities exceeding 95% and a violation of the Bell inequality with $S=2.57\pm 0.06$ could be demonstrated.

References in corpus (5)

• On the genesis and evolution of Integrated Quantum Optics
• Polarization entangled photon-pair source based on a type-II PPLN waveguide emitting at a telecom wavelength
• A pulsed Sagnac source of narrowband polarization-entangled photons
• Generation of polarization entangled photons using type-II doubly periodically poled lithium niobate waveguides
• High-quality polarization entanglement state preparation and manipulation in standard telecommunication channels

Cited by in corpus (28)

• Chip-based photon quantum state sources using nonlinear optics
• Quantum photonics at telecom wavelengths based on lithium niobate waveguides
• Entangled Photon-Pair Sources based on three-wave mixing in bulk crystals
• Path-polarization hyperentangled and cluster states of photons on a chip
• Integrated sources of entangled photons at telecom wavelength in femtosecond-laser-written circuits
• High-performance source of spectrally pure, polarization entangled photon pairs based on hybrid integrated-bulk optics
• High efficiency 'plug & play' source of heralded single photons
• Toolbox for the design of $LiNb{O}_3$-based passive and active integrated quantum circuits
• A source of polarization-entangled photon pairs interfacing quantum memories with telecom photons
• A two-channel, spectrally degenerate polarization entangled source on chip
• Dual-path source engineering in integrated quantum optics
• Mesoscopic coherence in light scattering from cold, optically dense and disordered atomic systems
• Direct generation of frequency-bin entangled photons via two-period quasi-phase-matched parametric downconversion
• Monolithic Semiconductor Chips as a Source for Broadband Wavelength-Multiplexed Polarization Entangled Photons
• On-chip generation of photon-triplet states
• Polarization entangled photon-pair source based on quantum nonlinear photonics and interferometry
• Nonlinear Nanoresonators for Bell State Generation
• Numerical Investigation of Photon-Pair Generation in Periodically Poled MTiOXO4 (M = K, Rb, Cs; X = P, As)
• A novel single-crystal & single-pass source for polarisation- and colour-entangled photon pairs
• Two Polarization Entangled Sources from the Same Semiconductor Chip
• High-visibility nonclassical interference of photon pairs generated in a multimode nonlinear waveguide
• Temporally versatile polarization entanglement from Bragg-reflection waveguides
• Nonlinear Domain Engineering for Quantum Technologies
• Highly efficient polarization-entangled photon-pair generation in lithium niobate waveguides based on bound states in the continuum
• Two-colour spectrally multimode integrated SU(1,1) interferometer
• Entanglement indicators for quantum optical fields: three-mode multiport beamsplitters EPR interference experiments
• Engineered photon-pair generation by four-wave mixing in asymmetric coupled waveguides
• Flexible Entanglement Distribution Overlay for Cloud/Edge DC Interconnect as Seed for IT-Secure Primitives