The experimental results are fit well with theoretical calculation . 4 . reviewing different methods for constructing optical superlattice . parameters are designed for constructing ppln used for the second harmonic generation of 1064nm pumping wave 晶体,声光调q获得1064urn脉冲输出,泵浦多周期的ppln opo ,获得可调谐信号光输出,实验结果与理论计算相吻合。