一种新型的圆偏振光分束器的设计及分析  

The design of a new beam splitter for circularly polarized light

作　　者：潘雪丰[1] 陶卫东[1] 蒋卫敏[2] 白贵儒[3] 

机构地区：[1]宁波大学理学院,浙江宁波315211 [2]宁波大学科学技术学院,浙江宁波315211 [3]宁波大学信息学院,浙江宁波315211

出　　处：《应用激光》2007年第1期47-49,共3页Applied Laser

基　　金：国家自然科学基金(60307003);宁波大学人才基金(2005512)

摘　　要：对两种旋向相反却又各向同性的旋光晶体进行组合,可以获得一种新型的圆偏振光分束器。本文计算了波长为300nm-800nm的偏振光通过此类器件后产生的左右旋圆偏振光的分离角,并对其相关的性能进行了分析。计算结果表明:对于两块晶体所组成的器件,左右旋圆偏振光之间分离的最大角度超过0.2°。此类器件的特点是由各向同性的旋光晶体构成,光在其内部传输时,具有的圆偏振状态不会因传输方向而变,经过器件后的左右旋圆偏振光都是严格的圆偏振光。By combining two kinds of isotropie crystals which have different signs of optical rotation, a new circularly polarized light splitter can be obtained. At the wavelength from 300nm to 800nm, the separated angles between left-handed and righthanded circularly polarized light are calculated after the linearly polarized light passed the splitter. The correlative characteristics are investigated. The results indicate that： when the splitter is made up of two pieces of crystal, the separated angle between left-handed and right-handed circularly polarized light exceeds 0.2 . Due to isotropie crystals, the polarized state of light will not be changed along different direction when light transmits inside the splitter. The light will retain true circularly polarized state after the left-handed and right-handed circularly polarized light pass the splitter.

关 键 词：旋光晶体 各向同性 圆偏振光 分离角 

分 类 号：TN256[电子电信—物理电子学]