title: Quantum frequency translation of single-photon states in a photonic crystal fiber.
abstract: We experimentally demonstrate frequency translation of a nonclassical optical field via four-wave mixing (Bragg-scattering process) in a photonic crystal fiber (PCF). The high nonlinearity and the ability to control dispersion in PCF enable efficient translation between nearby photon channels within the visible to-near-infrared spectral range, useful in quantum networks. Heralded single photons at 683 nm were translated to 659 nm with an efficiency of 28.6±2.2 percent. Second-order correlation measurements on the 683- and 659-nm fields yielded g(683)(2) (0)=0.21±0.02 and g(659)(2) (0)=0.19±0.05, respectively, showing the nonclassical nature of both fields.
authors.affiliation: Oregon Center for Optics and Department of Physics, University of Oregon, Eugene, Oregon 97403, USA. hmcguinn@uoregon.edu
authors.forename: H J
authors.initials: HJ
authors.lastname: McGuinness
authors.forename: M G
authors.initials: MG
authors.lastname: Raymer
authors.forename: C J
authors.initials: CJ
authors.lastname: McKinstrie
authors.forename: S
authors.initials: S
authors.lastname: Radic