光纤布拉格光栅传感器优化方法研究
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摘要
光纤布拉格光栅传感器(FBGS)是光纤传感器的一种,可以实现对温度、应变等物理量的直接测量,但存在精度和反射功率低及交叉敏感等问题。提出一种新的算法,该算法基于传感器系统及Matlab工具,使用新的流程表达式对传递矩阵法(TMM)和耦合模式理论(CMT)进行编程,其主要目的是寻求更高的反射功率及精度。结果表明,所提出的算法可有效优化FBGS窗口轮廓,有助于获得更好的结果。
The fiber Bragg grating sensor(FBGS)as a kind of optical fiber sensor can realize the direct measurement of temperature,strain and other physical quantities,but has the problems of low precision,low reflection power and cross sensitivity. Therefore,a new algorithm based on sensor system and Matlab tools is proposed,and uses the new flow expression to program the transfer matrix method(TMM)and coupling mode theory(CMT). The main purpose of the algorithm is to seek the higher reflection power and accuracy. The results show that the proposed algorithm can optimize the FBGS window contour effectively,and is help to get better results.
The fiber Bragg grating sensor(FBGS)as a kind of optical fiber sensor can realize the direct measurement of temperature,strain and other physical quantities,but has the problems of low precision,low reflection power and cross sensitivity. Therefore,a new algorithm based on sensor system and Matlab tools is proposed,and uses the new flow expression to program the transfer matrix method(TMM)and coupling mode theory(CMT). The main purpose of the algorithm is to seek the higher reflection power and accuracy. The results show that the proposed algorithm can optimize the FBGS window contour effectively,and is help to get better results.
引文
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[2]CHAOUI F,HAJAJI A,AGHZOUT O.Chirped Bragg grating dispersion compensation in dense wavelength division multiplexing optical long-haul networks[J].Microwave optical technology,2015,10(5):1-7.
[3]TAN D T H,IKEDA K,SAPERSTEIN R E,et al.Chip-scale dispersion engineering using chirped vertical gratings[J].Optics letters,2008,33(24):3013-3015.
[4]MOHAMMED N A,ALI T A,ALY M H.Evaluation and performance enhancement for accurate FBG temperature sensor measurement with different apodization profiles in single and quasi-distributed DWDM systems[J].Optics and lasers in engineering,2014,55(7):22-34.
[5]KHALID K S,ZAFRULLAH M,BILAL S M,et al.Simulation and analysis of Gaussian apodized fiber Bragg grating strain sensor[J].Journal of optical technology,2012,79(10):667-673.
[6]孙丽.光纤光栅传感应用问题解析[M].北京:科学出版社,2011.SUN Li.Analysis of application problems of fiber grating sensing[M].Beijing:Science Press,2011.
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[8]叶茂,陈祥祥,黄诗帆.基于转换矩阵法中间带弹性支撑剪切梁模态求解[J].科学技术与工程,2017,16(36):1-5.YE Mao,CHEN Xiangxiang,HUANG Shifan.Mode-based solution of shear beam with elastic support based on transformation matrix method[J].Science technology and engineering,2017,16(36):1-5.
[9]刘胜,韩新颖,熊玉川,等.基于弱光纤光栅阵列的分布式震动探测系统[J].中国激光,2017,44(2):1-6.LIU Sheng,HAN Xinying,XIONG Yuchuan,et al.Distributed vibration detection system based on weak fiber Bragg grating array[J].China laser,2017,44(2):1-6.
[10]梁丽丽,刘明生,李燕.长周期光纤光栅传感应变交叉敏感的研究[J].激光与红外,2015,4(3):1020-1023.LIANG Lili,LIU Mingsheng,LI Yan.Study on strain crosssensitivity of long-period fiber grating sensing[J].Laser&infrared,2015,4(3):1020-1023.