摘要
提出了一种用计算机实现的光纤 Bragg光栅反射波长移位的探测方法。由计算机经 D/ A转换器产生一个扫描三角波 ,驱动 PZT周期拉伸参考光纤光栅。当参考光纤光栅栅距与传感光纤光栅栅距匹配时 ,探测器输出峰值 ,由此可测得传感光纤光栅反射波长移位。实验表明 ,该方法可构成柔性实验系统 ,具有波长移位探测精度高 ,线性度好 ,易操作等优点。
This paper presents a method by using a computer to detect the reflected wavelength shift of fiber Bragg gratings(FBG′s).A D/A converter.Controlled by the computer is used to produce a scanning triangle wave,which drives PZT to stretch the FBG periodically.The peak of the reflected wavelength of FBG is located by detector precisely when the reference grating pitch is equal to the pitch of sensing FBG.So we can get the reflected wavelength shift.Experiments have shown this method has the advantage of high precision,fine linearity and easy manipulation,and can establish a flexible experimental system.
出处
《压电与声光》
CSCD
北大核心
2002年第3期180-182,共3页
Piezoelectrics & Acoustooptics
基金
国防科技预研基金资助项目 (99J2 .5 .1.JW0 10 8)
关键词
反射波长移位
光纤布喇格光栅
栅距
探测
reflected wavelength shift
fiber Bragg gratings(FBG′s)
grating pitch
detection
