title: Microstructured fiber source of photon pairs at widely separated wavelengths.
abstract: We demonstrate a source of photon pairs with widely separated wavelengths, 810 and 1548 nm, generated through spontaneous four-wave mixing in a microstructured fiber. The second-order autocorrelation function g((2))(0) was measured to confirm the nonclassical nature of a heralded single-photon source constructed from the fiber. The microstructured fiber presented herein has the interesting property of generating photon pairs with wavelengths suitable for a quantum repeater able to link free-space channels with fiber channels, as well as for a high-quality telecommunication wavelength heralded single photon source. It also has the advantage of potentially low-loss coupling into standard optical fiber. These reasons make this photon pair source particularly interesting for long-distance quantum communication.
authors.affiliation: Institute for Quantum Information Science (IQIS), Department of Physics and Astronomy, University of Calgary,2500 University Dr. NW, Calgary, Alberta T2N 1N4, Canada. jslater@qis.ucalgary.ca
authors.forename: Joshua A
authors.initials: JA
authors.lastname: Slater
authors.forename: Jean-Simon
authors.initials: JS
authors.lastname: Corbeil
authors.forename: Stéphane
authors.initials: S
authors.lastname: Virally
authors.forename: Félix
authors.initials: F
authors.lastname: Bussières
authors.forename: Alexandre
authors.initials: A
authors.lastname: Kudlinski
authors.forename: Géraud
authors.initials: G
authors.lastname: Bouwmans
authors.forename: Suzanne
authors.initials: S
authors.lastname: Lacroix
authors.forename: Nicolas
authors.initials: N
authors.lastname: Godbout
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Tittel