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Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)

Cross-Polarized Photon Pair Source using Type-II Quasi-Phase Matched Parametric Down-Conversion

Shigehiro Nagano, Koji Suizu, Yohei Sugiura, Ryōsuke Shimizu, Keiichi Edamatsu, Hiromasa Ito

Published Aug 1, 2007• 0 citations
Publisher

Abstract

We have developed a high-efficiency source of cross-polarized photon pairs in a 800-nm band via type-II quasi-phase matched spontaneous parametric down-conversion using periodically poled lithium niobate. We obtained 25,000 coincidence counts sec-1mW-1of the photon pairs.
DOI
10.1109/cleopr.2007.4391333

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We report on the generation of narrowband photon pairs at telecommunication wavelengths using a periodically poled lithium niobate waveguide that utilizes the nonlinear tensor element d(24) for type-II quasi phase matching. The FWHM bandwidth of the spontaneous parametric downconversion was 1 nm. The brightness of the photon pair source was ~6x10(5)/s/GHz when the pump power was 1 mW. The indistinguishability of the signal and idler photons generated by the degenerate spontaneous parametric downconversion process was studied in a Hong-Ou-Mandel type interference experiment.