FIR滤波法改善光纤布喇格光栅传感系统性能  

FIR Filter for Improving the Performance of Fiber Bragg Grating Sensor System

作　　者：吴薇[1] 刘辛[1] 陈婷[2] 

机构地区：[1]武汉理工大学理学院物理系,武汉430070 [2]武汉通信指挥学院,武汉430010

出　　处：《光电子技术》2008年第2期73-76,80,共5页Optoelectronic Technology

摘　　要：光纤光栅的波长移位检测是光纤光栅传感实用化的关键技术之一。现有的波长检测方法其波长探测精度受到光噪声及有害干涉信号的限制。采用可调谐窄带光源法实现波长检测,并使用数字滤波器技术降低系统中的有害干涉信号。数值模拟结果和实验结果表明,在光纤布拉格光栅传感系统的波长检测过程中采用FIR滤波器可提高系统信噪比和波长测量精度,有效改善系统性能。Wavelength-shift detection is the key technology of fiber grating sensor. The measurement accuracy of the existing wavelength-shift detection methods is limited by light noise and harmful interferometric signal. The method of tunable narrow-band light source is adopted to realize wavelength-shift detection, and digital filter is introduced to reduce the effect of harmful interferometric signal. The result of numerical simulation and experiment shows that applying FIR filter into wavelength detection could enhance the signal noise ratio and wavelength measurement accuracy, improving the performance of FBG sensor.

关 键 词：有限冲激响应滤波器 光纤布喇格光栅 波长检测 

分 类 号：TN713[电子电信—电路与系统]