磁旋光晶体特性及其在自动偏振检测中的应用

Characteristics of Magneto-optic Rotation Crystal and Application in Full-automatic Polarization Detection

综述分析了磁旋光晶体的特性,包括磁光效应的基本理论、磁致圆二向色性、磁光晶体中Faraday效应的非线性、物质磁性分类。并介绍了目前常用的自动偏振检测装置即步进电机控制检偏器旋转,由于机械装置的局限性,导致步进电机控制检偏器旋转的自动偏振检测装置很难达到更高精度。在对磁旋光晶体的特性进行分析后,发现完全可以应用于自动偏振检测中,由此提出了关于自动偏振检测装置的新方案即应用磁旋光晶体实现自动偏振检测。

Characteristics of magneto-optic rotation crystal such as basic theories of magneto-optical ef-fect, the dichroism of magneto circulars, nonlinear of Faraday effect in magneto-optic crystal and magnetic clas-sification of material are analyzed. And common detection device for full-automatic polarization, such as step- ping motor which is used to control the analyzer rotation is introduced. Full-automatic polarization detection de- vices are difficult to reach higher accuracy due to the limitations of mechanical devices. Magneto-optic rotation crystal is suitable to be used in full-automatic polarization detection after the characteristic analysis. So a new scheme for full-automatic polarization detection devices by using magneto-optic rotation crystal is proposed.