Open AccessNarrowband high-fidelity all-fibre source of heralded single photons at 1570 nm
Author(s) -
Alex McMillan,
J Fulconis,
M. Halder,
Chunle Xiong,
John Rarity,
William J. Wadsworth
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.006156
Subject(s) - narrowband , photon , optics , physics , single photon source , bandwidth (computing) , spontaneous parametric down conversion , coherence (philosophical gambling strategy) , four wave mixing , photonics , nonlinear optics , laser , quantum , telecommunications , computer science , quantum mechanics , quantum entanglement
An all-fibre heralded single photon source operating at 1570 nm has been demonstrated. The device generates correlated photon pairs, widely spaced in frequency, through four-wave mixing in a photonic crystal fibre. Separation of the pair photons and narrowband filtering is all achieved in fibre. The output heralded single photon rate was 9.2 x 10(4) per second, with a counts-to-accidentals ratio of 10.4 and a heralding fidelity of 52 %. Furthermore, narrowband filtering ensured that the output single photon state was near time-bandwidth limited with a coherence length of 4 ps. Such a source is well suited to quantum information processing applications.