Fabrication and characterization of proton-exchanged lithium niobate

Proton-exchanged (PE) lithium niobate waveguides have potential value in application of photonics devices. Based on the characterization of PE waveguides and theoretical predication of Cerenkov SHG. We design a PE waveguide that is optimal for Cerenkov SHG in which we experimentally observe effective blue and green SHG.