Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Optics Communications

Highly efficient polarization-entangled photon source using periodically poled lithium niobate waveguides

Yun-Kun Jiang, Akihisa Tomita

Published Jun 16, 2006• 14 citations
Publisher
DOI
10.1016/j.optcom.2006.05.060

Related papers

Degenerate Parametric down-conversion at 1570 nm by periodically poled lithium niobate waveguide: a route to single photon source and photon entanglement”

S Castelletto, Ivo Pietro Degiovanni, Leonardo Papi +3 more

SPIE eBooks•Jan 1, 2006•0 citations

A Gigahertz-rate source of Polarization-Entangled Photons using Type-0 PPLN Waveguides

Bienvenu I. Ndagano, Ruaridh Smith, Lewis D. Wright +5 more

We demonstrate a source of polarization-entangled photons based on periodically poled lithium niobate waveguides that produces pairs of entangled photons at a rate of 1.25 gigahertz and a CHSH entanglement parameter of 2.73.

•Jan 1, 2024•0 citations

Efficient polarization-entangled photon generation using two-period PPLN waveguides

Bo Cao

The Japan Society of Applied Physics•Jul 8, 2014•0 citations

Degenerate polarization entangled photon source based on a single Ti-diffusion lithium niobate waveguide in a polarization Sagnac interferometer

Yu Sun, Changwei Sun, Wei Zhou +5 more

Combining a Ti-diffusion periodically poled lithium niobate (PPLN) waveguide with a Sagnac interferometer, two opposite directions type-II spontaneous parametric down conversions (SPDC) occur coherently and yield a high brightness, high stability polarization entanglement source. The source produces degenerate photon pairs at 1540.4 nm with a brightness of B = (1.36 ± 0.03) × 106 pairs/(s⋅nm⋅mW). We perform quantum state tomography to reconstruct the density matrix of the output state and obtain a fidelity of F = 0.983 ± 0.001. The high brightness and phase stability of our waveguide source enable a wide range of quantum information experiments operating at a low pump power as well as hold the advantage in mass production which can promote the practical applications of quantum technologies.

Chinese Physics B•May 25, 2023•3 citations

Development and Characterization of a Periodically Poled Lithium Niobate Photon Pair Source

Sean Krupa, Eric Stinaff, Lee C. Oesterling +1 more

Bulletin of the American Physical Society•Jun 10, 2015•0 citations

Development of photon pair sources using periodically poled lithium niobate waveguide technology and fiber optic components

Lee C. Oesterling, Fernando Monteiro, Sean Krupa +7 more

To support quantum technologies that require entangled photon pairs and/or heralded photons for operation, a photon pair source was developed that uses periodically poled lithium niobate (PPLN) waveguides that are coupled to optical fibers. Both Ti-indiffused and annealed proton-exchanged (APE) waveguide technologies were studied, and waveguide/fiber interfaces were designed to increase the coupling efficiency of the photon pairs into optical fiber. PPLN waveguide devices were fabricated and the optical loss, wavelength conversion efficiency, and heralding efficiency were measured. The maximum heralding efficiencies achieved were 75 and 68% for Ti-indiffused and APE waveguides, respectively. A compact photon pair source based on a packaged PPLN waveguide device and commercially available fiber optic components is presented.

Journal of Modern Optics•May 26, 2015•8 citations
Combining a Ti-diffusion periodically poled lithium niobate (PPLN) waveguide with a Sagnac interferometer, two opposite directions type-II spontaneous parametric down conversions (SPDC) occur coherently and yield a high brightness, high stability polarization entanglement source. The source produces degenerate photon pairs at 1540.4 nm with a brightness of B = (1.36 ± 0.03) × 106 pairs/(s⋅nm⋅mW). We perform quantum state tomography to reconstruct the density matrix of the output state and obtain a fidelity of F = 0.983 ± 0.001. The high brightness and phase stability of our waveguide source enable a wide range of quantum information experiments operating at a low pump power as well as hold the advantage in mass production which can promote the practical applications of quantum technologies.
To support quantum technologies that require entangled photon pairs and/or heralded photons for operation, a photon pair source was developed that uses periodically poled lithium niobate (PPLN) waveguides that are coupled to optical fibers. Both Ti-indiffused and annealed proton-exchanged (APE) waveguide technologies were studied, and waveguide/fiber interfaces were designed to increase the coupling efficiency of the photon pairs into optical fiber. PPLN waveguide devices were fabricated and the optical loss, wavelength conversion efficiency, and heralding efficiency were measured. The maximum heralding efficiencies achieved were 75 and 68% for Ti-indiffused and APE waveguides, respectively. A compact photon pair source based on a packaged PPLN waveguide device and commercially available fiber optic components is presented.