Four-wave mixing in high-Q tellurium-oxide-coated silicon nitride microring resonators

We report the first-time observation, to the best of our knowledge, of four-wave mixing (FWM) in hybrid tellurium oxide coated silicon nitride ring resonators with internal Q factors of 1.7 × 10 5 to 1.0 × 10 6 . We show oscillation at NIR wavelengths ranging from 1020 nm to 2530 nm under 1590 nm pumping. The FWM process has been investigated for TeO 2 -coated Si 3 N 4 ring resonators with a 600 µm radius and FWM is observed for threshold …