基于光纤梳状滤波器的光纤Bragg光栅波长解调技术研究  

Research on fiber Bragg gating wavelength demodulation utilizing fiber interleaver filter

作　　者：高璇[1] 黄俊斌[1] 顾宏灿[1] 陈飞[1] 

机构地区：[1]海军工程大学兵器工程系,湖北武汉430033

出　　处：《舰船科学技术》2008年第3期122-126,共5页Ship Science and Technology

摘　　要：为了提高光纤Bragg光栅波长解调系统的解调精度和速度，研究了光纤Bragg光栅中心波长的解调方法，提出了一种利用光纤梳状滤波器对光纤Bragg光栅中心波长标定的方法。该方法基于牛顿插值算法，利用光纤梳状滤波器提供参考点，实现对光纤Bragg光栅中心波长的标定。研究结果表明，该方法可通过光纤梳状滤波器提供多个参考点，提高了解调精度；拉格朗日插值算法和牛顿插值算法的解调精度都很高，达到了±1-±5pm，波长的均方误差小于4pm。牛顿插值算法的运算量小，节省算术运算次数，尤其是节省乘、除次数，给计算机处理大量数据提供了方便。To improve the accuracy and speed of demodulation system of fiber Bragg getting（FBG） sensor,a calibration method of FBG center wavelength based on fiber interleaver filter is proposed after the research. Based on Newton demodulation algorithm, reference points are offered by fiber interleaver filter to calibrate the center wavelength of FBG. The result of the research shows that with more reference points offered by fiber interleaver filter, the demodulation accuracy of the system is improved; both Lagrange and Newton demodulation algorithm have the exact demodulation. The accuracy is ± 1 - ± 5pm, and errors of the center wavelength is 4pm. Newton demodulation algorithm costs less calculation in signal processing,especially the time of multiplication and division, so it is convenient for computer to deal with multiple data in signal demodulating.

关 键 词：光纤BRAGG光栅 光纤F-P滤波器 梳状滤波器 解调 

分 类 号：TN247[电子电信—物理电子学]