title: Generation of bright visible photon pairs using a periodically poled stoichiometric lithium tantalate crystal.
abstract: 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.
authors.forename: Hee Jung
authors.initials: HJ
authors.lastname: Lee
authors.forename: Heonoh
authors.initials: H
authors.lastname: Kim
authors.forename: Myoungsik
authors.initials: M
authors.lastname: Cha
authors.forename: Han Seb
authors.initials: HS
authors.lastname: Moon