基于套嵌光纤光栅的高灵敏度光纤电流传感器
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摘要
提出了一种基于套嵌光纤光栅的光纤电流传感器,用二次曝光法制作的长周期光栅和布拉格光栅套嵌而成的光纤光栅作为传感元件,在套嵌的光栅表面沉积一层高电阻镍铁合金作为加热电极层.电流通过时对光栅区域加热,引起光栅光谱中心波长漂移,实现了高灵敏度的电流测量。实验结果表明:所设计的光纤电流传感器电流响应灵敏度达到7.2×10~(-2)nm/mA,且具有结构简单、体积小等优点,在高灵敏度的光纤电流检测领域具有广泛的应用价值。
A novel fiber-optic current sensor based on a nested fiber grating is proposed.Long period grating fabricated by two-exposure method and Bragg grating are nested to form fiber grating,and it's used as sensing element.Surface of the nested fiber grating is sputtered with a layer of high resistance Ni-Fe alloy,which is used as heating electrode layer.When the current passes through,the grating region is heated,which leads to center wavelength of grating spectrum shifting.High sensitivity current measurement is realized.Experimental results show that the current response sensitivity of the designed optical fiber current sensor reaches 7.2×10~(-2) nm/mA.It has the advantages of simple structure,small size,and has wide application value in the field of high sensitivity optical fiber current detection.
A novel fiber-optic current sensor based on a nested fiber grating is proposed.Long period grating fabricated by two-exposure method and Bragg grating are nested to form fiber grating,and it's used as sensing element.Surface of the nested fiber grating is sputtered with a layer of high resistance Ni-Fe alloy,which is used as heating electrode layer.When the current passes through,the grating region is heated,which leads to center wavelength of grating spectrum shifting.High sensitivity current measurement is realized.Experimental results show that the current response sensitivity of the designed optical fiber current sensor reaches 7.2×10~(-2) nm/mA.It has the advantages of simple structure,small size,and has wide application value in the field of high sensitivity optical fiber current detection.
引文
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[19]Zhou C,Jiang D.Novel current sensor based on fiber Bragg grating[C].ICO20:Optical Information Processing,International Society for Optics and Photonics,2006:1143-1148.
[2]Guan B O,Wang S N.Fiber grating laser current sensor based on magnetic force[J].IEEE Photonics Technology Letters,2010,22(4):230-232.
[3]Ning Y N,Wang Z P,Palmer A W.Recent progress in optical current sensing techniques[J].Rev.Sci.Instrum.,1995,66(5):3097-3130.
[4]Cremonezi A O,Ferreira E C,Filho A J B,et al.A fiber Bragg grating RMS current transducer based on the magnetostriction effect using a Terfenol-D toroidal-shaped modulator[J].IEEE Sensors Journal,2013,13(2):683-690.
[5]Niewczas P,Dziuda L,Fusiek G,et al.Design and evaluation of a preprototype hybrid fiber-optic voltage sensor for a remotely interrogated condition monitoring system[J].IEEE Transactions on Instrumentation and Measurement,2005,54(4):1560-1564.
[6]Oh M C,Seo J K,Kim K J,et al.Optical current sensors consisting of polymeric waveguide components[J].Journal of Lightwave Technology,2010,28(12):1851-1857.
[7]Reilly D,Willshire A J,Fusiek G,et al.A fiber-Bragg-grating-based sensor for simultaneous AC current and temperature measurement[J].IEEE Sensors Journal,2006,6(6):1539-1542.
[8]Heredero R L,De Caleya R F,Guerrero H,et al.Micromachined optical fiber current sensor[J].Appl.Opt.,1999,38(25):5298-5230.
[9]Zhao Y,Meng Q Y,Chen K.Novel current measurement method based on fiber Bragg grating sensor technology[J].Sensors Actuators A:Phys.,2006,126(1):112-116.
[10]Zhao Yong,Song Tingting.Fiber Bragg grating current sensor based on birefringence effect[J].Microwave and Optical Technology Letters,2012,54(3):822-824.
[11]De Nazare Fabio V B,Werneck M M,De Oliveira R P.Development of an optical sensor head for current and temperature measurements in power systems[J].Journal of Sensors,2013,2013:393406.
[12]Cheng C H,Chen M H,Liu W F.Measurement of AC current using a superstructure fiber grating[J].Microwave and Optical Technology Letters,2008,50(5):1168-1171.
[13]Zhou C,Wang D,Zhang W,et al.Fiber Bragg grating high-current sensor based on magnetic coupling[J].Photonic Microdevices/Microstructures for Sensing III,2011,8034(16):1486-1491.
[14]Bao Binghao,Zhang Ling.Current sensor based on giant magnetostrictive material and fiber Bragg grating[C].Proc.of SPIE,2008,7157:715705.
[15]Saez-Rodriguez D,Cruz J L,Diez A,et al.All-fiber noninterferometric narrow-transmission-bandpass filter[J].Optics Letters,2012,37(20):4314-4316.
[16]Saez-Rodriguez D,Cruz J L,Diez A,et al.Coupling between counter propagating cladding modes in fiber Bragg gratings[J].Optics Letters,2011,36(8):1518-1520.
[17]Sohn Kyung-Rak,Shim June-Hwan,Yang Gyu-Sik.Remote measurement of a distant temperature and current using fiber Bragg grating sensors and erbium-doped fiber ring laser[J].Journal of the Korean Society of Marine Engineering,2008,32(8):1257-1262.
[18]Ying Z,Lina Z,Wang Z M,et al.High sensitivity current sensor based on fiber Bragg grating and piezoelectric element[C].7th International Conference on Electronic Measurement and Instruments,2005,7:64-67.
[19]Zhou C,Jiang D.Novel current sensor based on fiber Bragg grating[C].ICO20:Optical Information Processing,International Society for Optics and Photonics,2006:1143-1148.