| 分布式光纤布里渊散射应变传感器参数计算 |
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| 引用本文： | 黄民双,曾励,陶宝祺,黄尚廉.分布式光纤布里渊散射应变传感器参数计算[J].航空学报,1999,20(2):137-140. |
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| 作者姓名： | 黄民双 曾励 陶宝祺 黄尚廉 |
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| 作者单位： | 1. 南京航空航天大学智能材料与结构航空科技重点实验室, 南京, 210016;2. 重庆大学国家教委光电技术与系统开放实验室, 重庆, 400044 |
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| 基金项目： | 国家自然科学基金,航空基础科学基金 |
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| 摘 要： | 介绍了由布里渊散射机理构成的分布式光纤应变传感器，首次推导出了布里渊散射光相对于入射光的频移与光纤应变的关系及有关参数的理论计算公式。计算结果表明：光纤中由应变引起的布里渊频移变化主要是通过调制杨氏模量实现的；其布里渊频移为几十GHz,由应变引起的布里渊频移变化量为几十MHz.其理论与实验数据基本吻合。
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| 关 键 词： | 布里渊散射 光纤传感器 应变传感器 参数计算 |
| 收稿时间： | 1998-05-20 |
| 修稿时间： | 1998-09-30 |
PARAMETER CALCULATION OF DISTRIBUTED OPTICAL FIBER STRAIN SENSOR BASED ON BRILLOUIN SCATTERING |
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| Huang Minshuang ,Zeng Li ,Tao Baoqi ,Huang Shanglian.PARAMETER CALCULATION OF DISTRIBUTED OPTICAL FIBER STRAIN SENSOR BASED ON BRILLOUIN SCATTERING[J].Acta Aeronautica et Astronautica Sinica,1999,20(2):137-140. |
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| Authors: | Huang Minshuang Zeng Li Tao Baoqi Huang Shanglian |
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| Institution: | 1. The Key Laboratory for Smart Materials & Structures, Nanjing University of Aeronautics and Astronautics,Nanjing,210016;2. The Open Laboratory for Optoelectronic Techno logy & System s ofthe State Educat ion Comm ission of Ch ina, Chongqing U niversity, Chongqing, 400044 |
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| Abstract: | Brillouin scattering in optical fiber is a nonlinear effect, i.e.scattering and frequency shift equal to the natural frequency of medium will occur when the pump light interplays with acoustic wave.Optical fiber strain can be exactly measured by Brillouin spectrum, and the longitudinal strain distribution along fiber length can also be got when pulse pump light is launched into optical fiber.In this paper, distributed optical fiber strain sensor based on Brillouin is introduced.The relationship between optical fiber strain and frequency shift of Stokes light to pump light and parameter calculation formula are published.The results show that Brillouin frequency shift caused by strain in fiber is mainly created by changing Young's modulus, Brillouin frequency shift is about several GHz, and variation of Brillouin frequency shift caused by strain is about several MHz.The theory is coincident with experiments. |
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| Keywords: | Brillouin scattering fiber sensor strain sensor parameter calculation |
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