| 基于二阶保偏光纤Sagnac环光纤激光器的振动检测研究 |
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| 引用本文： | 周锐,张菁,忽满利,冯忠耀,高宏,杨扬,张敬花,乔学光.基于二阶保偏光纤Sagnac环光纤激光器的振动检测研究[J].物理学报,2012,61(1):14216-014216. |
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| 作者姓名： | 周锐 张菁 忽满利 冯忠耀 高宏 杨扬 张敬花 乔学光 |
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| 作者单位： | 1. 西北大学物理系, 西安 710069;
2. 西安石油大学光电油气测井与检测教育部重点实验室, 西安 710065 |
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| 基金项目： | 国家自然科学基金(批准号: 60727004, 61077060)、国家863计划(批准号: 2007AA03Z413, 2009AA06 Z203)、 教育部科技创新工程重大项目(批准号: Z08119)、科技部国际科技合 作项目(批准号: 2008CR1063)、陕西省重大科技创新项目(2009ZKC01-19, 2008ZDGC-14)和西北大学研究生创新教育项目(批准号: 09YZZ53)资助的课题. |
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| 摘 要： | 提出了一种可用于振动检测的新型光纤光栅传感技术. 用偏振控制器和高双折射保偏光纤构建成Sagnac环, 结合掺铒光纤、单模光纤和隔离器, 形成了单波长光纤激光器, 由粘有光纤Bragg光栅的悬臂梁作为传感探头, 并利用Sagnac环本身的线性边缘, 解调振动信号. 阐述了Sagnac环原理及其产生的边缘效应, 并进行了数值模拟计算, 对振动信号进行了检测实验, 检测系统从L1到L1+L2之间对应的周期可调, 灵敏度高达38.2 μ W/nm, 线性度为0.9996, 动态范围在40–70 dB, 可满足振动传感检测的技术参数要求.
关键词：
光纤光学
振动检测
保偏光纤Sagnac环
光纤激光器
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| 关 键 词： | 光纤光学 振动检测 保偏光纤Sagnac环 光纤激光器 |
| 收稿时间： | 2011-01-21 |
| 修稿时间： | 3/8/2011 12:00:00 AM |
A vibration detection system based on two-stage polarization maintaining fiber Sagnac loop fiber laser |
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| Zhou Rui,Zhang Jing,Hu Man-Li,Feng Zhong-Yao,Gao Hong,Yang Yang,Zhang Jing-Hua and Qiao Xue-Guang.A vibration detection system based on two-stage polarization maintaining fiber Sagnac loop fiber laser[J].Acta Physica Sinica,2012,61(1):14216-014216. |
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| Authors: | Zhou Rui Zhang Jing Hu Man-Li Feng Zhong-Yao Gao Hong Yang Yang Zhang Jing-Hua and Qiao Xue-Guang |
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| Institution: | Department of Physies, Northwest University, Xi'an 710069, China;Department of Physies, Northwest University, Xi'an 710069, China;Department of Physies, Northwest University, Xi'an 710069, China;Department of Physies, Northwest University, Xi'an 710069, China;Department of Physies, Northwest University, Xi'an 710069, China;Ministry of Education Key Laboratory of Photoelectricity Gas-oil Logging and Detecting, Xi'an Shiyou University, Xi'an 710065, China;Department of Physies, Northwest University, Xi'an 710069, China;Department of Physies, Northwest University, Xi'an 710069, China;Department of Physies, Northwest University, Xi'an 710069, China;Ministry of Education Key Laboratory of Photoelectricity Gas-oil Logging and Detecting, Xi'an Shiyou University, Xi'an 710065, China |
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| Abstract: | A novel fiber grating sensing technique utilized for vibration detection is proposed and experimentally demonstrated.A single wavelength laser is formed by polarization controllers and polarization maintaining fiber（PMF） to construct the high birefringence （Hi-Bi） Sagnac loop,PMF combined with erbium-doped fiber,single mode fiber and polarizer.The cantilever glued to an FBG is used as a sensor probe,and the linear edge of Sagnac ring laser are used to demodulate fiber optic seismic vibration signal.Sagnac ring theory and its edge effects are described in detail,and numerical simulation and experiment show that the vibration signal detection system is adjusted periodically in a range from L1 to L1 + L2,sensitivity goes up to 38.2μW/nm of discrimination,the linearity is 0.9996,and the dynamic range is 40—70 dB,these meeting the requirements for vibration detection technical parameters. |
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| Keywords: | optical fiber vibration detection Hi-Bi PMF Sagnac loop fiber laser |
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