郝蕴琦, 李海宁, 杨坤, 孔鹏, 苏磊, 李俊丰, 陈镇平. 法拉第镜旋转角的偏振分束测量法[J]. 应用光学, 2009, 30(4): 626-630.
引用本文: 郝蕴琦, 李海宁, 杨坤, 孔鹏, 苏磊, 李俊丰, 陈镇平. 法拉第镜旋转角的偏振分束测量法[J]. 应用光学, 2009, 30(4): 626-630.
HAO Yun-qi, LI Hai-ning, YANG Kun, KONG Peng, SU Lei, LI Jun-feng, CHEN Zhen-ping. Polarization-beam-splitter measurement of rotary angle for Faraday mirror[J]. Journal of Applied Optics, 2009, 30(4): 626-630.
Citation: HAO Yun-qi, LI Hai-ning, YANG Kun, KONG Peng, SU Lei, LI Jun-feng, CHEN Zhen-ping. Polarization-beam-splitter measurement of rotary angle for Faraday mirror[J]. Journal of Applied Optics, 2009, 30(4): 626-630.

法拉第镜旋转角的偏振分束测量法

Polarization-beam-splitter measurement of rotary angle for Faraday mirror

  • 摘要: 提出了基于偏振分束法的法拉第镜偏振旋转角的测量方法。利用非偏振分束器改变法拉第镜出射光的方向,偏振分束器将该出射光分为p光和s光,分别测量其光强,应用后续差除和信号处理方案消除光源波动的影响,推导出法拉第镜偏振旋转角的理论表达式。分析了起偏器的消光比非0及起偏角误差对输出结果的影响,分别是0.05729和-0.1000。实验验证了该方法的可行性,重复测量结果为89.68,均方值为0.01493。

     

    Abstract: The measurement of polarization rotary angle for faraday mirror based on polarization-beam-splitter was proposed. The orientation of the light from the faraday mirror was changed through a non-polarized beam splitter (NPBS). With a polarized beam splitter (PBS), the light reflected from NPBS was split into S light and P light. Their intensities were measured, and the theoretical expression of rotary angle was deduced after the impact of optical fluctuation is eliminated by signal processing. The influence of non-zero extinction ratio and polarized-angle error on output results was analyzed. Finally the intensities were repeatedly measured, and the average rotary angle was 89.68, the mean square deviation of all the experimental data was 0.01493.

     

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