Abstract
A multichannel polarization-entangled photon-pair source in an MgO-doped
periodically poled lithium niobate (MgO:PPLN) waveguide is proposed. Based on type I
quasi-phase-matched spontaneous parametric down conversion in a single MgO: PPLN
waveguide placed inside a Sagnac interferometer and pumped by monochromatic light, a
source capable of supporting tens to hundreds of channels of polarization-entangled
photon pairs in fiber communication bands simultaneously can be achieved. An inherent
channel switch of this source is investigated, which will be significant for future
entanglement distribution networks.
© 2016 Chinese Laser Press
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