Green light generation in a periodically poled Zn-doped LiNbO_3 planar waveguide fabricated by He~+ implantation

摘要

An optical planar waveguide is investigated in ZnO-doped periodically poled lithium niobate formed by He~+ implantation. Optical losses were found to be 2 dB/cm. Second- harmonic generation is used to produce a green laser beam by quasi-phase matching in the obtained waveguide. The conversion efficiency was found to be 10~(-2)%/W. Photorefractive resistance properties are reported and discussed relating to un-doped periodically poled lithium niobate.