Narrowband high-fidelity all-fibre source of heralded single photons at 1570 nm.
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.
Centre for Photonics and Photonic Materials, Department of Physics, University of Bath, Claverton Down, Bath, BA2 7AY, UK. a.r.mcmillan@bath.ac.uk
A R
AR
McMillan
J
J
Fulconis
M
M
Halder
C
C
Xiong
J G
JG
Rarity
W J
WJ
Wadsworth
D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology; D008029:Lighting / Q000295:instrumentation*; D008962:Models, Theoretical; D017785:Photons; D011789:Quantum Theory; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity