Efficient Green and Blue Light Generation Using SHG Devices with Periodically Poled Structures

Abstract

We have developed efficient SHG devices for green and blue light generation with periodically poled structures in thick Z-cut MgO: LiNbO3 utilizing a multi-pulse poling method. Uniformly periodically domaininverted structures with a period of 6.95μm and 4.19μm were fabricated over 10-mm interaction length. We have demonstrated highly efficient green and blue light generation using bulk QPM-SHG devices with this structure. Using compact and high-power Nd: GdVO4 micro-laser, CW SHG of 1.03W at a wavelength of 531nm was generated with conversion efficiency of 16.5% by single-pass configuration at room temperature. Moreover, CW SHG of 167mW at a wavelength of 456nm was realized with a conversion efficiency of 8.3%.