Phys. Rev. A 54, 893–897 (1996)Two-photon interference in optical fiber multiportsReceived 14 February 1996; published in the issue dated July 1996 We report the measurement of nonclassical photon statistics at the outputs of 2×2 and 3×3 fiber couplers resulting from quantum-mechanical second-order interference of entangled photon pairs from a parametric down-conversion source. This is a demonstration of the bunching of bosons at the outputs of fiber multiports. Single-mode fibers provide precise wavelength selection from the down-conversion source spectrum, thus yielding very long coherence times and good collection efficiency without the need of interference filters. Two-photon interference visibilities close to the theoretical maximum were achieved in the experiments. © 1996 The American Physical Society. © 1996 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.54.893
DOI:
10.1103/PhysRevA.54.893
PACS:
42.50.Ar, 03.65.Bz, 42.81.Qb
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