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Efficient source of high purity polarization-entangled photon pairs in the 1550nm telecommunication band
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- Authors
- Tae-Gon Noh, Heo Noh Kim, Tae Hyoung Zyung, Jae Wan Kim
- Issue Date
- 2007-01
- Citation
- Applied Physics Letters, v.90, no.1, pp.1-3
- ISSN
- 0003-6951
- Publisher
- American Institute of Physics (AIP)
- Language
- English
- Type
- Journal Article
- Abstract
- The authors present an efficient source of high purity polarization- entangled photon pairs in the standard 1550 nm telecommunication band using a type-II degenerate parametric downconversion process. They first measured the spatial intensity distributions of the downconverted light to verify the beamlike, collinear, and noncollinear generations at the 1550 nm wavelength. All four Bell states could easily be generated by selecting the intersection of two downconverted light cones in the noncollinear phase matching. They observed two-photon fringe visibilities of up to 98짹3% and violations of Bell's inequality by up to nine standard deviations when the accidental coincidences were subtracted. © 2007 American Institute of Physics.
- KSP Keywords
- 1550 nm, Bell state, Bell's inequality, Entangled photon, High-purity, Intensity distributions, Noncollinear phase matching, Parametric down-conversion, Two-Photon, Type II, photon pairs