Experimental investigation of nonlinear process based on cSHG/DFG in PPLN waveguide  

作　　者：沈世奎 宁春梅 杨爱英 孙雨南 

机构地区：[1]School of Optoelectronics Beijing Institute of Technology

出　　处：《Journal of Beijing Institute of Technology》2011年第2期256-260,共5页北京理工大学学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(60777024;60978007)

摘　　要：Effects of second harmonic generation （SHG） and cascaded second harmonic generation/difference frequency generation（cSHG/DFG） based on the quasi-phase-matching （QPM） condition in periodically poled lithium niobate （PPLN） waveguide were investigated experimentally. SHG conversion efficiency of -13.6dB and QPM bandwidth of 0.45nm were achieved using a 16.1dBm power of fundamental wave at 1550.4nm. Using pulsed all-fiber passive mode locked laser and tunable continuous wave laser, cSHG/DFG effect utilized for optical sampling was observed. Conversion efficiencies were calculated, and 11.88nm-wide QPM bandwidth was achieved through changing the wavelength of input signal. Conversion efficiency of cSHG/DFG effect increased linearly with the total injected power.Effects of second harmonic generation （SHG） and cascaded second harmonic generation/difference frequency generation（cSHG/DFG） based on the quasi-phase-matching （QPM） condition in periodically poled lithium niobate （PPLN） waveguide were investigated experimentally. SHG conversion efficiency of -13.6dB and QPM bandwidth of 0.45nm were achieved using a 16.1dBm power of fundamental wave at 1550.4nm. Using pulsed all-fiber passive mode locked laser and tunable continuous wave laser, cSHG/DFG effect utilized for optical sampling was observed. Conversion efficiencies were calculated, and 11.88nm-wide QPM bandwidth was achieved through changing the wavelength of input signal. Conversion efficiency of cSHG/DFG effect increased linearly with the total injected power.

关 键 词：periodically poled lithium niobate （PPLN） quasi-phase-matching （QPM） second harmonic generation （SHG） cascaded second harmonic generation/difference frequency generation （cSHG/DFG） wavelength conversion optical sampling 

分 类 号：TN929.11[电子电信—通信与信息系统]