基于偏芯结构的光纤传感器的振动传感特性研究
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摘要
提出了一种基于偏芯熔接结构的光纤振动传感器,该传感器具有较好的梳状滤波特性和较高的消光比。通过对该结构的传感器的弯曲响应特性进行分析,实验结果表明该传感器对弯曲变化表现出了近似线性响应的特性。在此基础上进一步研究了传感器的振动响应特性,对传感器工作在线性响应区域和非线性响应区域的振动响应特性进行了分析和对比。实验结果表明,该传感器在线性工作区域表现出了极好的振动响应特性,其振动响应谱线与马赫曾德尔型光纤干涉仪相类似。此外,该传感器在无振动情况下的噪声极低,具有较好的实际应用价值。
An optical fiber vibration sensor based on a core-offset structure is proposed and demonstrated.This kind of fiber sensor shows a nice comb filter property and has a high extinction ratio.The curvature sensing characteristic of the core-offset structure is analyzed.The experiment results show that this kind of sensor exhibits a linear response to bending curvature.The vibration characteristic of the sensor is studied at this basic.And the vibration responses of the sensor with the input laser wavelengths located in the linear responding area and in the transmission peaks or dips are analyzed.The results show that this kind of vibration sensor exhibits a fine vibration response with the input laser wavelength located in the linear responding area,just like Mach-Zehnder fiber interferometer.In addition,the sensor shows a nice noise characteristic when there is no vibration,which means good application prospects.
An optical fiber vibration sensor based on a core-offset structure is proposed and demonstrated.This kind of fiber sensor shows a nice comb filter property and has a high extinction ratio.The curvature sensing characteristic of the core-offset structure is analyzed.The experiment results show that this kind of sensor exhibits a linear response to bending curvature.The vibration characteristic of the sensor is studied at this basic.And the vibration responses of the sensor with the input laser wavelengths located in the linear responding area and in the transmission peaks or dips are analyzed.The results show that this kind of vibration sensor exhibits a fine vibration response with the input laser wavelength located in the linear responding area,just like Mach-Zehnder fiber interferometer.In addition,the sensor shows a nice noise characteristic when there is no vibration,which means good application prospects.
引文
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13 Jiang Yi,Huang Junbin.Wavelength division multiplex based on fiber optical vibration sensor array[J].Chinese J Lasers,2005,32 (11):1525-1528.江毅,黄俊斌.基于波分复用器的光纤光栅振动传感器阵列[J].中国激光,2005,32(11):1525-1528.
14 W C Wong,C C Chang,Y F Zhang,et al..Miniature singlemode fiber refractive index interferometer sensor based on high order cladding mode and core-offset[J].IEEE Photon Technol Lett,2012,24(5):359-361.
15 JChen,J Zhou,Z Jia.High-sensitivity displacement sensor based on a bent fiber Mach-Zehnder interferometer[J].IEEE Photon Technol Lett,2013,25(23):2354-2357.
16 JChen,J Zhou,Q Zhang,et al..All-fiber modal interferometer based on a joint-taper-joint fiber structure for refractive index sensing with high sensitivity[J].IEEE Sens J,2013,13(7):2780-2785.
17 ZBai,W Zhang,S Gao,et al..Compact long period fiber grating based on periodic micro-core-offset[J].IEEE Photon Technol Lett,2013,25(21):2111-2114.
18 YGong,T Zhao,Y J Rao,et al..All-fiber curvature sensor based on multimode interference[J].IEEE Photon Technol Lett,2011,23(11):679-681.
2 Wang Hongliang,Chen Jiaomin,Fan Wei,et al..Characteristics of low-frequency vibration FBG sensor[J].J Optoelectronics·Laser,2012,23(6):1023-1030.王宏亮,陈娇敏,樊伟,等.光纤Bragg光栅低频振动传感器的特性研究[J].光电子·激光,2012,23(6):1023-1030.
3 Dong Xinyong,Zhao Chunliu,Ning Ding,et al..Temperatureindependent bend sensor using chirp effect of fiber Bragg grating[J].Acta Photonica Sinica,2001,30(4):425-428.董新永,赵春柳,宁鼎,等.用光纤光栅的啁啾效应实现温度不敏感的弯曲传感[J].光子学报,2001,30(4):425-428.
4 Wang Yiping,Chen Jianping,Rao Yunjiang.Long period fiber grating sensors measuring bend-curvature and determining benddirection simultaneously[J].J Optoelectronics·Laser,2005,16(10):1139-1143.王义平,陈建平,饶云江.同时测量弯曲曲率和弯曲方向的长周期光纤光栅传感器[J].光电子·激光,2005,16(10):1139-1143.
5 Jiang Zongfu,Xi Fengjie,Xu Xiaojun,et al..Theory and applications of defocus grating wavefront curvature sensing[J].Chinese J Lasers,2010,37(1):205-210.姜宗福,习锋杰,许晓军,等.光栅型波前曲率传感器原理和应用[J].中国激光,2010,37(1):205-210.
6 Tong Zhenrong,Wang Jieyu,Yang Xiufeng,et al..Simultaneous measurement of temperature and strain based on core diameter mismatch and fiber Bragg grating[J].Acta Optica Sinica,2012,32(12):1206001.童峥嵘,王洁玉,杨秀峰,等.基于纤芯失配和光纤布拉格光栅实现温度和应变同时测量[J].光学学报,2012,32(12):1206001.
7 Chen Yaofei,Han Qun,He Yang,et al..Study of single modemultimode-single mode refractive index sensor based on no core fiber[J].Chinese J Lasers,2013,40(9):0905001.陈耀飞,韩群,何洋,等.基于无芯光纤的单模多模单模折射率传感器的研究[J].中国激光,2013,40(9):0905001.
8 Fu Lihui,Yin Wenqing.Investigation on on-line optical fiber surface plasma resonance sensors based on frequency modulation spectroscopy[J].Acta Optica Sinica,2013,33(6):0612004.付丽辉,尹文庆.基于调频光谱原理的在线式表面等离子体共振光纤传感器[J].光学学报,2013,33(6):0612004.
9 Wang Wenyuan,Wen Jianxiang,Pang Fufei,et al..All singlemode fiber Fabry-Perot interferometric high temperature sensor fabricated with femtosecond laser[J].Chinese J Lasers,2012,39 (10):1005001.王文辕,文建湘,庞拂飞,等.飞秒激光制备的全单模光纤法布里珀罗干涉高温传感器[J].中国激光,2012,39(10):1005001.
10 Zhao Huaxin,Jiang Yongxiang,Luo Tianqiong,et al..Hollow optical fiber sensor based on surface plasmon resonance[J].Acta Optica Sinica,2012,32(6):0628001.赵华新,蒋永翔,罗天穹,等.基于表面等离子体共振原理的空芯光纤传感器[J].光学学报,2012,32(6):0628001.
11 M L Filograno,P Corredera Guillen,A Rodriguez-Barrios,et al..Real-time monitoring of railway traffic using fiber Bragggrating sensors[J].IEEE Sens J,2012,12(1):85-92.
12 Sun Qizhen,Liu Deming,Wang Jian.A novel ring structurebased distributed optical fiber vibration sensing system[J].Acta Physica Sinica,2007,56(10):5903-5908.孙琪真,刘德明,王健.基于环结构的新型分布式光纤振动传感系统[J].物理学报,2007,56(10):5903-5908.
13 Jiang Yi,Huang Junbin.Wavelength division multiplex based on fiber optical vibration sensor array[J].Chinese J Lasers,2005,32 (11):1525-1528.江毅,黄俊斌.基于波分复用器的光纤光栅振动传感器阵列[J].中国激光,2005,32(11):1525-1528.
14 W C Wong,C C Chang,Y F Zhang,et al..Miniature singlemode fiber refractive index interferometer sensor based on high order cladding mode and core-offset[J].IEEE Photon Technol Lett,2012,24(5):359-361.
15 JChen,J Zhou,Z Jia.High-sensitivity displacement sensor based on a bent fiber Mach-Zehnder interferometer[J].IEEE Photon Technol Lett,2013,25(23):2354-2357.
16 JChen,J Zhou,Q Zhang,et al..All-fiber modal interferometer based on a joint-taper-joint fiber structure for refractive index sensing with high sensitivity[J].IEEE Sens J,2013,13(7):2780-2785.
17 ZBai,W Zhang,S Gao,et al..Compact long period fiber grating based on periodic micro-core-offset[J].IEEE Photon Technol Lett,2013,25(21):2111-2114.
18 YGong,T Zhao,Y J Rao,et al..All-fiber curvature sensor based on multimode interference[J].IEEE Photon Technol Lett,2011,23(11):679-681.
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