Open AccessTwo-photon quantum interference in the 1.5 μm telecommunication band
Author(s) -
Seok-Beom Cho,
Tae-Gon Noh
Publication year - 2007
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.15.007591
Subject(s) - optics , spontaneous parametric down conversion , photon , physics , interference (communication) , interferometry , wavelength , quantum optics , limit (mathematics) , coincidence , quantum , telecommunications , quantum mechanics , quantum entanglement , computer science , medicine , mathematical analysis , channel (broadcasting) , alternative medicine , mathematics , pathology
We report on two-photon quantum interference experiments in the standard telecommunication band. Two identical photons in the 1.5 mm wavelength band were generated in spatially separated modes by a type-I spontaneous parametric down-conversion process, and injected into a fiber-optic Hong-Ou-Mandel interferometer. Two-photon interference patterns of dip and spatial beating in the coincidence counting rate were observed by varying the difference in optical path lengths. The visibilities obtained in the net coincidences were close to the theoretical value of 100%. The raw visibilities were also well above the classical limit.