偏振无关的旋光双反射结构的实验研究

Experimental study on polarization-independent reflector structure based on magneto-optical crystal and two mirrors

完成了偏振无关双旋光晶体双反射结构的实验研究.根据其偏振补偿特点对双旋光晶体双反射结构进行简化,提出了一种偏振无关的单旋光晶体双反射结构.实验表明,两种反射结构的偏振保持度均能达到99.97%以上.作为对比,分别测试了单个反射镜反射90和两个反射镜反射90时的输出光偏振态.该条件下,无保偏处理的反射镜的偏振保持度分别只有92.1%和76.2%.

The experimental demonstration of polarization-independent reflection structure that consists of two magneto-optical crystals and two mirrors is reported. According to the characteristics of polarization compensation, the reflection structure was simplified in this paper. A single magneto-optical crystal and two mirrors reflection structure is presented to simplify the polarization-independent reflection structure. The experiment shows that the degrees of polarization maintenance of the two reflection structures are both higher than 99.97%. By way of contrast, the polarization states of 90° reflection laser of single mirror and two mirrors are measured. Under these conditions, the degrees of polarization maintenance of mirrors are 92.1% and 76.2%, respectively.