| 阶跃型多模光纤参数的理论误差及其修正方案 |
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| 引用本文： | 傅克祥,朱世国.阶跃型多模光纤参数的理论误差及其修正方案[J].四川大学学报(自然科学版),1989,26(2):168-175. |
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| 作者姓名： | 傅克祥 朱世国 |
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| 作者单位： | 四川大学物理系
(傅克祥)，四川大学物理系(朱世国) |
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| 摘 要： | 对波动理论和射线理论算得的散射图进行了比较,找出了特征散射角的差异.在后向散射区中找出了修正这种差异的经验公式,在前向散射区中找出了差异较小的区域。提出了综合利用前、后向散射图,测定阶跃型多模光纤结构参数的一种修正方案,理论误差较小,容易鉴别特征散射角。
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| 关 键 词： | 多模光纤 结构参数 散射图法 误差 |
THE THEORETICAL ERROR OF THE SCATTERING-PATTERN METHOD FOR MEASURING PARAMETERS OF STEP INDEX MULTIMODE FIBERS AND CORRECTION |
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| Fu Kexiang Zhu Shiguo.THE THEORETICAL ERROR OF THE SCATTERING-PATTERN METHOD FOR MEASURING PARAMETERS OF STEP INDEX MULTIMODE FIBERS AND CORRECTION[J].Journal of Sichuan University (Natural Science Edition),1989,26(2):168-175. |
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| Authors: | Fu Kexiang Zhu Shiguo |
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| Institution: | Department of Physics |
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| Abstract: | This paper makes some comparisions between two scattering patterns calculated respectively from ray theory and wave theory for the same fiber. The difference in scatterinq characteristic angles from two theories above is found. An experiential formula that corrects the difference in backscattering region is found. In forward scattering region a region with less difference is found. A modified method for measurinq parameters of step index multimode fiber is proposed. In this method both forward and back scattering patterns are used. The advantage of the method is its less theoretical error and easier identification of scatterinq characteristic angles compared with the original one. |
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| Keywords: | scatterinq pattern method multimode fiber parameter theoretical error theory of ray optics theory of wave optics |
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