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Phase-stable source of polarization-entangled photons using a polarization Sagnac interferometer
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We demonstrate a simple, robust, and ultrabright parametric down-conversion source of polarization-entangled photons based on a polarization Sagnac interferometer. Bidirectional pumping in type-II phase-matched periodically poled $\mathrm{K}\mathrm{Ti}\mathrm{O}\mathrm{P}{\mathrm{O}}_{4}$ yields a measured flux of 5000 polarization-entangled pairs/s/mW of pump power in a $1\text{\ensuremath{-}}\mathrm{nm}$ bandwidth at 96.8% quantum-interference visibility. The common-path arrangement of the Sagnac interferometer eliminates the need for phase stabilization for the biphoton output state.
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“Kim et al. (2006) proposed and implemented a polarization Sagnac interferometric configuration with bidirectional pumping of a type-II phase-matched periodically poled KTiOPO 4 (PPKTP) crystal.”
From Multiphoton entanglement and interferometry (2012) · cites this paper as Kim et al. (2006)
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Metadata
- Authors
- Kim, T., Fiorentino, M., & Wong, F. N. C.
- Affiliations
- Massachusetts Institute of Technology (US)
- Venue
- Physical Review A
- Publisher
- American Physical Society (APS)
- Published
- 2006-01
- Volume
- 73
- Issue
- 1
- ISSN
- 0556-2791 (ISSN-L)
- 1050-2947
- 1094-1622
- OpenAlex
- W2963389668
- Cited by
- 428
- References
- 13
- Citations by year
- 2026: 35 · 2025: 36 · 2024: 33 · 2023: 32 · 2022: 25 · 2021: 28 · 2020: 28 · 2019: 26 · 2018: 19 · 2017: 20 · 2016: 20 · 2015: 15 · 2014: 14 · 2013: 16 · 2012: 22
- FWCI
- 13.70
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review A (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Funders
- U.S. Department of Defense
- Deutscher Akademischer Austauschdienst
- Agricultural Research Development Agency
- National Institute of Standards and Technology
- Multidisciplinary University Research Initiative
- Army Research Office
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Information and Cryptography
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Photorefractive and Nonlinear Optics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum optics and atomic interactions
- Keywords
- polarization-entangled photons, Sagnac interferometer, parametric down-conversion, biphoton source, periodically poled KTiOPO4, type-II phase matching, bidirectional pumping, quantum interference visibility, common-path interferometry, phase stability
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