The generation of photon-pairs with controllable spectral correlations is crucial in quantum photonics. Here we present the design of a photonic crystal fiber to generate widely-spaced four-wave mixing bands with spectral correlations that can be tuned through the thermo-optic effect after being infiltrated with heavy water. We present a theoretical study of the purity of the signal (idler) photon generated as a function of temperature, pump spectral linewidth and the length of the fiber.
L. Velázquez-Ibarra, A. Díez, E. Silvestre, M. V. Andrés, and J. L. Lucio,"Modeling spectral correlations of photon-pairs generated in liquid-filled photonic crystal fibers", Journal of Optics, Vol. 22, art. 075203, 2020.
