Generation of bright visible photon pairs using a periodically poled stoichiometric lithium tantalate crystal.

Author(s) Lee, H.Jung; Kim, H.; Cha, M.; Moon, H.Seb
Journal Opt Express
Date Published 2015 Jun 01

We demonstrate a 711-nm-wavelength efficient photon-pair source under the condition of non-collinear type-0 quasi-phase-matching configuration in a periodically poled MgO-doped stoichiometric lithium tantalate (PPSLT) crystal pumped by a 355.7-nm laser. Such degenerate visible photon-pairs in the wavelength region of 710 nm are practically useful for increasing the data collection rate in silicon-based single photon detectors. We confirm that the visible photon pairs in the PPSLT crystal form a bright, high-purity source of correlated photons. Our results show a coincidence counting rate per input pump power of 98,500 Hz/mW, conversion efficiency of 1.66 × 10-9, and second-order coherence function g(2)(0) of 0.087 ± 0.002/mW.

DOI 10.1364/OE.23.014203
ISSN 1094-4087
Citation Opt Express. 2015;23(11):1420310.

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