| 超声波作用下的光纤布拉格光栅频谱分析 |
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| 引用本文： | 曾山,叶险峰.超声波作用下的光纤布拉格光栅频谱分析[J].江南大学学报(自然科学版),2007,6(3):293-296. |
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| 作者姓名： | 曾山 叶险峰 |
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| 作者单位： | 浙江大学,信息科学与工程学院,浙江,杭州,310027 |
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| 基金项目： | 教育部高等学校骨干教师项目(2002-111404) |
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| 摘 要： | 阐述了利用光纤布拉格光栅进行传感测量的基本原理与方法,讨论了由于超声波作用而引起的光纤布拉格光栅机械形变及折射率变化.引入分层传输矩阵法建立仿真模型,利用一组典型的光纤布拉格光栅参数并采用分层赋值与矩阵叠加的方法,数值模拟了超声波作用下光纤布拉格光栅的频谱特性.分析了该模型的有效作用条件及改变超声波波长及强度对光纤布拉格光栅频谱特性的影响.提出一种适用于多种条件下的利用光纤布拉格光栅测量超声波的方法,以及相应可供参考的仿真模型.
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| 关 键 词： | 光纤布拉格光栅 传输矩阵法 超声波 |
| 文章编号： | 1671-7147（2007）03-0293-04 |
| 收稿时间： | 2005-07-09 |
| 修稿时间： | 2005-07-092005-09-08 |
Spectral Analysis of Fiber Bragg Grating under Ultrasound Wave |
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| ZENG Shan,YE Xian-feng.Spectral Analysis of Fiber Bragg Grating under Ultrasound Wave[J].Journal of Southern Yangtze University:Natural Science Edition,2007,6(3):293-296. |
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| Authors: | ZENG Shan YE Xian-feng |
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| Institution: | College of Infomation Science and Engineering, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | The theory and technique of using a fiber Bragg grating for sensing has been introduced.The geometrical modulation and refractive index variation of a fiber Bragg grating caused by ultrasound wave have been discussed.The spectral character has been numerically simulated using the transfer matrix approach.The effect of both amplitude and wavelength of the US wave on the reflectivity of a fiber Bragg grating has been analyzed.The results of this analysis provide useful tools for the design of fiber Bragg gratings for ultrasound sensing meeting specific requirements. |
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| Keywords: | fiber Bragg gratings transfer matrix ultrasound wave |
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