【摘要】 近年来,径向偏振光因为其特殊的偏振特性而受到广泛的关注。本文以耦合波理论中的T矩阵算法为基础,用Matlab语言编制了能够计算多层复合结构光栅的程序算法,并用此程序算法对多层光栅模型进行了理论模拟。综合模拟结果,设计出光栅周期为1000 nm、槽深为70 nm、占空比为0.5和Ti2O5/SiO2交替镀膜35层数的径向偏振反射腔镜,并通过微纳加工工艺制备出光栅反射腔镜样品,将其应用于自行搭建的Nd∶YAG激光器系统中,获得了输出功率12.6 W,偏振纯度为96%的径向偏振光。更多还原

【Abstract】 The radially polarized light has gotten wide attention due to its special polarization property. Based on coupled-mode theory,a numerical algorithm that computes the structures of the multi-layer grating is programmed by Matlab. The multi-layer grating model is theoretically simulated with this algorithm. According to the simulation,a radial polarization reflection cavity mirror is designed,which includes 1000 nm grating period,70 nm groove depth,0. 5 of duty cycle and 35- layers Ti2O5/ SiO2,and the sample of radial polarization reflection cavity mirror is fabricated by micro-nano processing technology. This mirror is applied to the Nd ∶ YAG laser,the output power up to 12. 6 W,the purity of polarization exceed 96% radial polarization beams are obtained.更多还原