| 光弹调制器定标新方法 |
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| 引用本文： | 周军,苏桂英,李国华.光弹调制器定标新方法[J].光子学报,2001,30(1):81-85. |
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| 作者姓名： | 周军 苏桂英 李国华 |
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| 作者单位： | 1. 常熟高等专科学校物理系，常熟 215500
2. 曲阜师范大学激光研究所，曲阜 273165 |
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| 摘 要： | 对于光弹调制器的定标,传统的是寻找探测信号中基频分量最大值的方法,本文对此进行了讨论.根据贝塞耳函数J0(A)、J1(A)及其一阶导数的变化规律,提出一种通过测量直流分量来精确定标的新方法,该方法对延迟幅值A在的较大范围(103°～108°)内都能实现精确标定,同时由于在系统中省去了波片,可以实现在多波长的定标.
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| 关 键 词： | 光弹调制器 定标 延迟幅值 |
| 收稿时间： | 2000-04-24 |
| 修稿时间： | 2000年4月24日 |
A NEW METHOD FOR CALIBRATION OF PHOTOELASTIC MODULATOR |
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| Zhou Jun,Su Guiying,Li Guohua.A NEW METHOD FOR CALIBRATION OF PHOTOELASTIC MODULATOR[J].Acta Photonica Sinica,2001,30(1):81-85. |
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| Authors: | Zhou Jun Su Guiying Li Guohua |
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| Institution: | Zhou Jun,Su Guiying,Li Guohua 1 Department of Physics,Changshu Collage,Changshu 215500 1 Laser Institute,Qufu Normal University Qufu 273165 |
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| Abstract: | The traditional calibration method of PEM is elaborated fromtheory.It is found that the method searching the fundamental component maximum has some disadvantages:the accuracy is difficult to improve and it can not calibrate for multi-wavelength.By analyzing the first derivatives of Bessel functions J0（A） and J1（A）,we know that the absolute value of the first derivative of J0（A） is maximum in the range of 103°～108°.Another configuration to accurate calibration by detected the dc component is got according to the fact.In this configuration,a small change of peak retardation will cause an obvious change of dc component in the range of 103°～108°.Therefore,the accuracy of calibrtion is high in this configuration.Concurrently,calibration can be performing in broad wavelength band. |
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| Keywords: | Photoelastic modulator Calibration Peak retardation |
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