【摘要】 偏振棱镜是偏振耦合测试系统中的重要器件.本文设计了用于光纤寄生偏振耦合测试系统(DPCA)中的偏振棱镜.棱镜采用空气隙间隔,且光轴平行于入射平面的Glan-Taylor型结构,可以增强棱镜的抗光损伤能力,提高非常光线的透射比.与胶合型棱镜相比,在保证有效孔径大小的同时,缩小了棱镜的尺寸.理论分析了空气隙厚度与消光比的关系,当空气隙厚度大于27μm时,消光比达到10-7以上.更多还原

【Abstract】 Polarizing prism is an important element in polarization coupling detection system. A polarizing prism was designed for distributed polarization coupling analyzer (DPCA). It is an air-spaced Glan-Taylor prism with optical axis parallel to incident plane, which has high laser damage resistance and high transmission ratio of the extraordinary ray. Compared with cemented prism, this scheme reduces the dimension of the prism with the same clear aperture. Theoretical analysis of the relationship between extinction ratio and air-gap thickness was carried out. When the air-gap thickness is larger than 27 um, the extinction ratio is better than 10~7.更多还原