title: Proposal for in-fiber generation of telecom-band polarization-entangled photon pairs using a periodically poled fiber.
abstract: We treat spontaneous parametric downconversion in a periodically poled fiber, quasi-phase matched to allow for the generation of photon pairs at wavelengths within the low-loss telecommunications window. For an appropriate pump polarization, the unusual properties of such a fiber's effective chi(2) result in a biphoton wave function that is symmetric upon simultaneous exchange of downconverted photon frequencies and polarizations and that is nonzero over a wide range of downconverted frequencies. This could lead to a significant technical simplification of sources of in-fiber telecom-band polarization-entangled photons.
authors.affiliation: Department of Physics, University of Toronto, Toronto, Ontario, Canada. lhelt@physics.utoronto.ca
authors.forename: L G
authors.initials: LG
authors.lastname: Helt
authors.forename: Eric Y
authors.initials: EY
authors.lastname: Zhu
authors.forename: Marco
authors.initials: M
authors.lastname: Liscidini
authors.forename: Li
authors.initials: L
authors.lastname: Qian
authors.forename: J E
authors.initials: JE
authors.lastname: Sipe