| 基于双液晶相位延迟器调制的偏振光源 |
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| 引用本文： | 胡冬梅,牛国成.基于双液晶相位延迟器调制的偏振光源[J].北华大学学报(自然科学版),2017,18(1). |
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| 作者姓名： | 胡冬梅 牛国成 |
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| 作者单位： | 北华大学电气信息工程学院，吉林 吉林 132021;长春理工大学电子信息工程学院，吉林 长春 130022;北华大学电气信息工程学院,吉林 吉林,132021 |
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| 基金项目： | 国家“973”项目，国家自然科学基金项目，北华大学国家级横向科研项目 |
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| 摘 要： | 针对常规偏振发生器中机械转动带来系统误差大的问题,提出了基于双液晶相位延迟器调制的偏振光发生系统,该系统由偏振片结合两片液晶相位可变延迟器(Liquid Crystal Variable Retarder,LCVR)组成.利用液晶相位可变延迟器的电控作用,计算机控制双LCVR延迟量的不同组合,实现对入射光波偏振态的调制.通过对Stokes参数定义中的6种特定偏振态的测定,验证了此方案的可行性,偏振度的精度可达千分之一,可为系统定标和测试提供更加精确的偏振光源,并能大幅提高偏振测量系统的精度、节省实验时间.
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| 关 键 词： | 偏振 偏振方向调制 Stokes参数 液晶可变相位延迟器(LCVR) |
Polarization Modulation Source Based on Dual Liquid Crystal Variable Retarders |
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| Hu Dongmei,Niu Guocheng.Polarization Modulation Source Based on Dual Liquid Crystal Variable Retarders[J].Journal of Beihua University(Natural Science),2017,18(1). |
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| Authors: | Hu Dongmei Niu Guocheng |
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| Abstract: | Aiming at the problem of great system error existing in conventional polarization generator,polarization modulation tutoring experimental system based on dual liquid crystal variable retarders is presented. The setup is constituted of a linear polarizer and two liquid crystal phase variable retarders( LCVRS) . The state of polarization of the incident light is modulated through adjusting the control voltage of LCVRS by computer. Through determining six specific polarization state in the definition of stokes vector,the experimental result shows that the scheme is feasible, and the polarization degree accuracy is up to 1/1000, the setup can generate the desired polarization for system calibration and test,it can improve the accuracy of the experiments and save experimental time. |
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| Keywords: | polarization modulation of polarization direction Stokes vectors liquid crystal variable retarder ( LCVR) |
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