长周期光纤光栅传感信号解调技术研究现状
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摘要
长周期光纤光栅(LPFG)对温度、应变、液体浓度等外界环境变化的敏感度要远高于光纤布拉格光栅(FBG),在传感领域具有广泛的应用前景。然而LPFG的传感信号解调技术尚不成熟,大大制约了LPFG在传感领域的应用。针对现有LPFG传感信号的解调方法进行分析与评述,着重介绍了基于边沿滤波技术、法布里-珀罗(F-P)腔扫描滤波技术和阵列波导光栅(AWG)技术的几种解调方案,并对各个方案在解调精度、速度、成本等方面进行了比较与分析。此外,介绍了实现LPFG复用解调的方法,并在总结已有技术优缺点的基础上对LPFG信号解调技术的发展趋势进行了展望。
The working principle leads long period fiber grating(LPFG) more sensitive than fiber Bragg grating(FBG) in sensing areas such as temperature,strain,concentration,bending etc..LPFG has great potential in the field of sensors.Compared with FBG sensing signal,the signal interrogation of LPFG needs further research to satisfy the LPFG sensing application.The signal interrogation techniques of LPFG are reviewed and analyzed.The methods of using edge-filter,Fabry-Perot(F-P) cavity and arrayed waveguide grating(AWG) to interrogate LPFG sensing signal are analyzed and compared particularly.The approach to interrogate multiplexed sensors based on LPFG is introduced.Summary and expectation of demodulation technique development trend are presented.
The working principle leads long period fiber grating(LPFG) more sensitive than fiber Bragg grating(FBG) in sensing areas such as temperature,strain,concentration,bending etc..LPFG has great potential in the field of sensors.Compared with FBG sensing signal,the signal interrogation of LPFG needs further research to satisfy the LPFG sensing application.The signal interrogation techniques of LPFG are reviewed and analyzed.The methods of using edge-filter,Fabry-Perot(F-P) cavity and arrayed waveguide grating(AWG) to interrogate LPFG sensing signal are analyzed and compared particularly.The approach to interrogate multiplexed sensors based on LPFG is introduced.Summary and expectation of demodulation technique development trend are presented.
引文
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13X.P.Dong,Shenping Li,K.S.Chiang et al..Multiwavelength erbium doped fibre laser based on a high-birefringencefibre loop mirror[J].Electron.Lett.,2000,36(19):1609～1610
14Jia Zhenan,Liu Jing,Qiao Xueguang et al..A demodulation technology based on digital tunable F-P filter for fiber Bragggrating sensing signals[J].J.Optoelectronics.Laser,2011,22(5):649～651贾振安,刘静,乔学光等.FBG传感信号数字化可调谐F-P滤波器解调技术研究[J].光电子.激光,2011,22(5):649～651
15Yang Guangxue,Li Yanfeng,Kang Shouqiang.Investigation of general demodulation system for fiber Fabry-Perot sensorand fiber Bragg grating sensor[J].Electro-Optic Technology Application,2010,25(1):12～15杨广学,李岩峰,康守强.光纤F-P和FBG传感器通用解调系统的研究[J].光电技术应用,2010,25(1):12～15
16Gaspar M.Regp,Henrique M.Salgado,Jose L.Santos.Interrogation of a fiber Bragg grating using a mechanicallyinduced long-period fiber grating[J].IEEE Sensors Journal,2006,6(6):1592～1595
17Qiao Xueguang,Ding Feng,Jia Zhen′an et al..Research on a demodulation technology based on edge of linear filters ofASE light source[J].J.Optoelectronics.Laser,2009,20(9):1170～1173乔学光,丁锋,贾振安等.一种基于ASE光源的边缘滤波解调技术的研究[J].光电子.激光,2009,20(9):1170～1173
18Jiang Mingshun,Meng Ling,Sui Qingmei et al..A novel double-edged filter wavelength interrogation technology for FBGs[J].J.Optoelectronics.Laser,2011,22(3):355～358姜明顺,孟玲,隋青美等.一种新颖的双边缘滤波光纤布拉格光栅解调技术[J].光电子.激光,2011,22(3):355～358
19Pan Zijun,Zhao Jianlin,Li Enpu et al..Optimization of dynamic matched grating filtering demodulation drived bypiezoelectric ceramic[J].Acta Photonica Sinica,2010,39(2):243～246潘子军,赵建林,李恩普等.压电陶瓷驱动的动态匹配光栅滤波解调法优化[J].光子学报,2010,39(2):243～246
20Wang Shenggen,Yan Lianshan,Pan Wei et al..Investigation of track sensor based on matched fiber Bragg gratings[J].J.China Railway Society,2011,33(9):68～71王圣根,闫连山,潘炜等.基于匹配光栅解调的FBG轨道传感器研究[J].铁道学报,2011,33(9):68～71
21Lu Zhi.Fabrication and application of long period fiber gratings[J].Electro-Optic Technology Application,2009,24(1):46～49陆志.长周期光纤光栅制作及应用进展[J].光电技术应用,2009,24(1):46～49
22Zou Hongbo,Liang Dakai,Zeng Jie et al..Dynamic demodulation of fiber Bragg grating vibration sensor based on cascadedlong-period fiber grating[J].Chinese J.Lasers,2011,38(8):0805005邹红波,梁大开,曾捷等.基于级联长周期光纤光栅的光纤布拉格光栅振动传感器的动态解调[J].中国激光,2011,38(8):0805005
23Zhou Rui,Qiao Xueguang,Wang Ruohui et al..Seismic wave interrogation system based on the linear edge filtercharacteristics of long period fiber grating[J].J.Optoelectronics.Laser,2011,22(7):987～990周锐,乔学光,王若晖等.基于长周期光纤光栅线性边缘滤波的地震波解调系统[J].光电子.激光,2011,22(7):987～990
24Jiang Mingshun,Meng Ling,Sui Qingmei et al..High-sensitivity vibration detection system based on double-LPFG demodulation[J].J.Optoelectronics.Laser,2011,22(8):1207～1210姜明顺,孟玲,隋青美等.基于双LPFG解调的高灵敏度振动检测系统[J].光电子.激光,2011,22(8):1207～1210
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