Open AccessEntangled photon generation in two-period quasi-phase-matched parametric down-conversion
Author(s) -
Wataru Ueno,
Fumihiro Kaneda,
Hirofumi Suzuki,
Shusaku Nagano,
Atsushi Syouji,
Ryosuke Shimizu,
Koji Suizu,
Keiichi Edamatsu
Publication year - 2012
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.005508
Subject(s) - spontaneous parametric down conversion , optics , photon , polarization (electrochemistry) , parametric statistics , quantum optics , physics , photon entanglement , wavelength , poling , nonlinear optics , phase (matter) , photon polarization , optoelectronics , quantum entanglement , quantum , laser , quantum mechanics , chemistry , statistics , mathematics , dielectric , ferroelectricity
We proposed and demonstrated a simple but deterministic scheme for generating polarization-entangled photon pairs at telecommunication wavelengths with type-II quasi-phase-matched spontaneous parametric down-conversion (QPM-SPDC) having two poling periods. We fabricated a LiNbO3 crystal having two poling periods so as to generate entangled photons at two wavelengths, i.e., 1506 nm and 1594 nm. We characterized the two-photon polarization state with state tomography and confirmed that the state was highly entangled.