【摘要】 利用共振泄露型光栅反射镜的偏振选择原理,设计并制备了35层镀膜、1000nm周期、70nm槽深的直线型光栅反射镜,并通过微纳加工工艺制备了相应的样品。用对比法对样品进行测量,测得光栅反射镜对TE光的反射率为87%,对TM光的反射率为98%,验证了其在中心波长1064nm处的偏振选择作用,与理论计算结果相符。使用光栅反射镜作为后腔镜,搭建了中心波长为1064nm的Nd:YAG激光器,在抽运电流为20.1A时获得了14.4W的基横模线偏振光输出,经过实验测量,输出光偏振度可达到95.7%。更多还原

【Abstract】 With the polarization-selective property of the resonance leaky-mode grating mirror,a35-layer grating mirror with 1000 nm period and 70 nm groove depth is designed and manufactured.The corresponding sample is prepared through the micro-nanofrabrication process.The bi-reflectivity of the sample is measured by contrast method,and its reflectivity is about 87%for TE wave and 98%for TM wave,which proves its polarization selection at the central wavelength of 1064 nm,and that is agree with theoretical result.Then the grating mirror is placed in a Nd:YAG laser cavity as the end mirror,with which a linearly polarized TEM00 laser beam at 1064 nm is got,its degree of polarization is about 95.7%and power is 14.4 W with pump current of 20.1 A.更多还原