| 光纤光栅两阶衍射的模式耦合理论探讨 |
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| 引用本文： | 封君,朱永,陈伟民,黄尚廉.光纤光栅两阶衍射的模式耦合理论探讨[J].光子学报,2000,29(7):633-636. |
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| 作者姓名： | 封君 朱永 陈伟民 黄尚廉 |
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| 作者单位： | 重庆大学光电工程学院,重庆,400044 |
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| 基金项目： | 中国科学院资助项目，， |
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| 摘 要： | 利用光纤光栅的1、2阶衍射实现温度/应变复合传感是近年来光纤光栅传感器研究领域的一个热点.理想情况下,光纤光栅的折射率分布函数是单一频率的余弦函数,而实际光纤光栅由于制造工艺的影响产生高阶折射率畸变.本文着重利用光波导模式耦合理论分析了这种非理想的折射率分布对光纤光栅反射性能的影响,得出了2阶折射率畸变将引起光栅的2阶衍射的结论;并简要探讨了利用光纤光栅的1、2阶衍射实现温度/应变复合传感方案存在的可能性.
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| 关 键 词： | 光纤光栅 布喇格衍射 折射率畸变 模式耦合 |
| 收稿时间： | 1999-12-07 |
| 修稿时间： | 1999-12-07 |
THEORETICAL ANALYSIS OF FIBER GRAGG GRATINGS' TWO ORDER DIFFRACTION USING MODE COUPLING THEORY |
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| Feng Jun,Zhu Yong,Chen Weimin,Huang Shanglian.THEORETICAL ANALYSIS OF FIBER GRAGG GRATINGS' TWO ORDER DIFFRACTION USING MODE COUPLING THEORY[J].Acta Photonica Sinica,2000,29(7):633-636. |
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| Authors: | Feng Jun Zhu Yong Chen Weimin Huang Shanglian |
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| Institution: | Optronic Engineering Department, Chongqing University, Chongqing 400044 |
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| Abstract: | Limited by manufacture procedures,there is an index distortion of FBG,and might cause high order harmonic diffraction.Based on the optical wave guide mode coupling theory,affection of this kind of non ideal index distortion is analyzed.It is theoretical demonstrated that,the second order index distortion of fiber can cause second order Bragg diffraction.The feasibility of compound strain temperature sensing based on this kind of high order diffraction of FBG is also discussed in this paper. |
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| Keywords: | Fiber grating Bragg diffraction Index distortion Mode coupling |
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