  We report measurements of time-frequency entangled photon pairs and heralded
single photons at telecommunications wavelengths, generated using a
periodically-poled, lithium niobate on insulator (LNOI) waveguide pumped
optically by a diode laser. We achieve a high Coincidences-to-Accidentals Ratio
(CAR) at high pair brightness, a low value of the conditional self-correlation
function [$g^{(2)}$(0)], and high two-photon energy-time Franson
interferometric visibility, which demonstrate the high quality of the entangled
photon pairs and heralded single photons.
