Red Laser-Induced Domain Inversion in MgO-Doped Lithium Niobate Crystals  

作　　者：李大汕 刘德安 职亚楠 曲伟娟 刘立人 张娟 

机构地区：[1]Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, PO Box 800-211, Shanghai 201800 [2]School of Communication and Information Engineering, Shanghai University, Shanghai 200072

出　　处：《Chinese Physics Letters》2007年第4期971-974,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 60177016, and the Fore-Research of Basic Research Project of China under Grant No 2002CCA03500.

摘　　要：A laser beam at wavelength 647nm is focused on a sample of 5mol% MgO-doped lithium niobate crystal for domain inversion by a conventional external electric field. In this case, a reduction of 36% in the electric field required for domain nucleation （nucleation field） is observed. To the best of our knowledge, it is the longest wavelength reported for laser-induced domain inversion. This extends the spectrum of laser inducing, and the experimental results are helpful to understand the nucleation dynamics under laser illumination. The dependence of nucleation fields on intensities of laser beams is analysed in experiments.A laser beam at wavelength 647nm is focused on a sample of 5mol% MgO-doped lithium niobate crystal for domain inversion by a conventional external electric field. In this case, a reduction of 36% in the electric field required for domain nucleation （nucleation field） is observed. To the best of our knowledge, it is the longest wavelength reported for laser-induced domain inversion. This extends the spectrum of laser inducing, and the experimental results are helpful to understand the nucleation dynamics under laser illumination. The dependence of nucleation fields on intensities of laser beams is analysed in experiments.

关 键 词：OPTICAL PARAMETRIC GENERATOR ULTRAVIOLET-LIGHT LINBO3 FIELD 

分 类 号：O434.3[机械工程—光学工程]