2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/109286We have studied the purity of entangled photon-pairs generated in a dispersion-shifted fiber at various temperatures. Two-photon interference with visibility > 98% is observed at 77K, without subtraction of the background Raman photons.Postdeadline paper presented at the Frontiers in Optics 2005--the 89th OSA Annual Meeting, Tucson, AZ, October 16-20,2005; paper PDP-A4Quantum Physicstext