Quasi phase matching (QPM) periodical poled LiNbO 3(PPLN) is designed and successfully fabricated to enable second harmonic generation(SHG).The samples were Z cut 0.5 mm thick and grating period is Λ=6.8 μm for the ...Quasi phase matching (QPM) periodical poled LiNbO 3(PPLN) is designed and successfully fabricated to enable second harmonic generation(SHG).The samples were Z cut 0.5 mm thick and grating period is Λ=6.8 μm for the first order QPM of continual wave λ=1.064 μm which is emitted by Nd∶YAG laser at room temperature 27 ℃. The output single pass SHG power was tested by an authorized optical system. The normalized max conversion efficiency is calculated to be 0.25 0 0(W·cm) -1 .The fabrication and parameters calculated method are introduced, and testing scheme is described in this paper. Even some ideas to improve conversion efficiency are offered.展开更多
采用外加电场极化法 ,实现了 Li Nb O3 晶体的周期性极化 ,并制备出周期为 9.5μm的三阶准相位匹配周期性极化 Li Nb O3 晶体 (PPLN) ;用准连续钛宝石激光器作基频光源 ,对准相位匹配周期性极化 Li Nb O3 进行了光学倍频实验 ,得到了 1 ...采用外加电场极化法 ,实现了 Li Nb O3 晶体的周期性极化 ,并制备出周期为 9.5μm的三阶准相位匹配周期性极化 Li Nb O3 晶体 (PPLN) ;用准连续钛宝石激光器作基频光源 ,对准相位匹配周期性极化 Li Nb O3 进行了光学倍频实验 ,得到了 1 2μW的蓝光输出。展开更多
文摘Quasi phase matching (QPM) periodical poled LiNbO 3(PPLN) is designed and successfully fabricated to enable second harmonic generation(SHG).The samples were Z cut 0.5 mm thick and grating period is Λ=6.8 μm for the first order QPM of continual wave λ=1.064 μm which is emitted by Nd∶YAG laser at room temperature 27 ℃. The output single pass SHG power was tested by an authorized optical system. The normalized max conversion efficiency is calculated to be 0.25 0 0(W·cm) -1 .The fabrication and parameters calculated method are introduced, and testing scheme is described in this paper. Even some ideas to improve conversion efficiency are offered.
