Ultraviolet Light Generation in a Periodically Poled MgO:LiNbO₃ Waveguide

Abstract

We demonstrated the highly efficient UV light generation of 386 nm wavelength in a periodically poled MgO:LiNbO 3 waveguide. Utilizing multiple short pulses for electric poling to off-cut MgO:LiNbO 3 , we succeeded in fabricating a uniform periodically poled structure with a period of 2.2 µm and a thickness of 1.5 µm over a 10 mm interaction length. By using this structure with a waveguide, the harmonic ultraviolet light generation with a high conversion efficiency of 1000 %/W was achieved in a single-pass configuration.