摘要
介绍了光学梳状滤波器的工作原理。通过改变取样光栅的参数,利用Matlab软件来仿真其反射谱,调试出4种基于取样光纤光栅的光学梳状滤波器。介绍了小波消噪的原理,为了优化取样光栅梳状滤波器设计,提出了利用小波分析的方法对反射谱进行降噪处理。选用db6小波进行了自动一维消噪,滤除了大部分的噪声干扰,而且对于信号的旁瓣干扰也起到了一定的抑制作用,得到平滑的反射谱。
Working principle of optical comb filter is introduced.By changing parameters of sampling fiber grating and simulating its reflective spectrum by Matlab.Four kinds of optical comb filters based on sampling fiber grating are debugged.Wavelet denoising principle is introduced.In order to optimize design of sampling grating comb filter,denoising processing is carried out by using wavelet analysis on reflection spectrum is proposed.Automatic one-dimensional denoising is carried out using db6 wavelet.It not only filtering major noise interference,but also play a certain inhibition affect in the side-lobe interference of signal.Smooth reflective spectrum can be obtained.
出处
《传感器与微系统》
CSCD
北大核心
2012年第11期14-16,共3页
Transducer and Microsystem Technologies
基金
河北省科技支撑计划资助项目(10213580)
河北省自然科学基金资助项目(F2012203204)
国家自然科学基金资助项目(61107039
61172044)
河北省测试计量技术及仪器重点实验室开放课题
关键词
小波分析
取样光栅
梳状滤波器
反射谱
wavelet analysis
sampling grating
comb filter
reflective spectrum
