Open AccessGeneration of bright visible photon pairs using a periodically poled stoichiometric lithium tantalate crystal
Author(s) -
Hee Jung Lee,
Heonoh Kim,
Myoungsik Cha,
Han Seb Moon
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.014203
Subject(s) - lithium tantalate , optics , materials science , photon , crystal (programming language) , tantalate , wavelength , lithium niobate , laser , optoelectronics , physics , ferroelectricity , computer science , dielectric , programming language
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.