Bright phase-stable broadband fiber-based source of polarization-entangled photon pairs
Journal Article
·
· Physical Review. A
- Optical Technology Division, National Institute of Standards and Technology, 100 Bureau Drive, Mail Stop 8441, Gaithersburg, Maryland 20899-8441 (United States) and Joint Quantum Institute, University of Maryland, College Park, Maryland 20742 (United States)
We describe an achromatic, phase-stable, broadband source of polarization-entangled photon pairs with high spectral brightness that uses four-wave mixing in a fiber Sagnac interferometer. We achieved a polarization-entangled two-photon coincidence rate of 7 kHz per 0.5 THz (0.9 nm) of bandwidth per 300 {mu}W of average pump power. At this rate, we observed two-photon fringe interference visibilities greater than 97%, over a 10 THz ({approx_equal}21 nm) spectral range. We measured violations of Bell's inequality by more than 22 standard deviations for each of the four Bell states in less than 3 minutes per state. The high spectral brightness (26 kHz nm{sup -1} mW{sup -1}), large tunable wavelength range, single spatial mode, and phase stability make this source a promising candidate for a wide range of quantum-information applications.
- OSTI ID:
- 21020831
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 76; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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