Quasi-Phase-Matched Parametric Fluorescence in a Periodically Inverted GaP Waveguide

We have fabricated periodically-inverted GaP/AlGaP waveguiding devices and succeeded in achieving quasi phase matching in an optical parametric interaction for the first time. Quasi-phase-matched parametric fluorescence signals at 1.6 and 3.1 µm were generated from 1.064 µm pump, and the estimated efficiency agreed with the theoretical one. The temperature tuning rates of type-I quasi-phase-matched interaction are -0.5 nm/K for signal in 1.6 µm range and 2.0 nm/K for idler in 3.1 µm range, respectively.