“…Therefore, it is considered an excellent integrated photonic platform for nonlinear frequency conversion, including second-harmonic (SH) generation, sum-frequency (SF) generation, differencefrequency generation, parametric down-conversion, and parametric oscillation. These features make it advantageous for photonic applications, such as entangled photon sources, [3,4] wavelength converters, [5] optical parametric oscillators, [6,7] and optical parametric amplifiers. [8] DOI: 10.1002/lpor.…”