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%.
