| 基于弯曲损耗的光纤温度传感器 |
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| 引用本文： | 周广丽,鄂书林,邓文渊. 基于弯曲损耗的光纤温度传感器[J]. 激光技术, 2009, 33(1): 46-49 |
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| 作者姓名： | 周广丽 鄂书林 邓文渊 |
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| 作者单位： | 中国科学院,长春光学精密机械与物理研究所,应用光学国家重点实验室,长春,130033;中国科学院,研究生院,北京,100049;中国科学院,长春光学精密机械与物理研究所,应用光学国家重点实验室,长春,130033 |
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| 摘 要： | 为了推导多模光纤弯曲损耗与弯曲半径、环境温度的关系,采用了WKB法求解非均匀直光纤的传播模数,并将弯曲光纤的有效折射率、弯曲光纤截止传播常数和光纤的热光效应同时引入到非均匀直光纤有效传播模数中。利用多模光纤进行实验验证,研制出测温灵敏度为0.1/℃、测温范围为10℃～70℃的光纤温度传感器。结果表明,弯曲损耗随弯曲半径的增大而减小,随环境温度的升高而减小,可以利用弯曲损耗测量环境温度。
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| 关 键 词： | 光纤光学 光纤温度传感器 WKB法 有效折射率 截止传播常数 有效传播模数 弯曲损耗 |
| 收稿时间： | 2007-11-21 |
| 修稿时间： | 2008-01-12 |
An optical fiber temperature sensor based on bending loss |
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| ZHOU Guang-li,E Shu-lin,DENG Wen-yuan. An optical fiber temperature sensor based on bending loss[J]. Laser Technology, 2009, 33(1): 46-49 |
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| Authors: | ZHOU Guang-li E Shu-lin DENG Wen-yuan |
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| Abstract: | Using WKB method to solve the number of modes of non-uniform straight fiber. Then, the effective refractive index of bending fiber, the cut-off of propagation constant of bending fiber and thermo-optic effect of fiber are introduced to it. We get the effective number of modes of bending loss, then, deduce that the bending loss is a function of curvature radius and temperature. Choosing multimode graded-index optical fiber to get a temperature sensor，the sensitivity of the sensor is 0.1/℃ and the temperature sensing range is 10℃~70℃. |
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| Keywords: | WKB theory effective refractive the cut-off of propagation constant the effective number of modes bending loss temperature |
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