使用光纤白光干涉仪测一维形变实验

光纤白光干涉仪是使用波长为1310 nm的半导体发光二极管的相位调制型光纤传感器,可用于压力、温度和应变的测量.本文介绍了光纤白光干涉仪的工作原理,设计了一维形变实验.

光纤白光干涉仪等臂长技术研究

介绍了几种光纤干涉仪等臂长技术,比较了各自的优缺点和适用范围,对光纤干涉仪的平衡有较大的参考价值。

Wavelet method for processing white light interferogram from optical fiber interferometer

A method based on the wavelet transform is proposed for processing white light Interferograms from optical fiber interferometers.With this method,the envelope and the zero optical path difference(ZOPD) of white light interferograms are obtained with high accuracy.The results agree well with those obtained by the method of center of gravity.Reasons for the insensitivity to noises of this method are discussed.The method is expected to be useful when processing white light interferograms from optical fiber interferometers,especially with low signal-to-noise ratio.

全保偏结构的光纤偏振耦合测试系统

在对白光干涉仪及白光干涉法偏振耦合(PC)测试原理进行分析的基础上,设计搭建基于白光干涉法的全保偏光纤结构的迈克耳孙(Michelson)干涉仪偏振耦合测试系统,实现对保偏光纤(PMF)偏振耦合的检测,并进行了单耦合点和多耦合点测试实验,耦合系数探测灵敏度可达70 dB,得到较好的实验结果,验证了白光光纤Michelson干涉法偏振耦合测试的可行性。最后,使用超辐射发光二极管(SLD)光源、放大自发辐射(ASE)光源和掺铒光纤放大器(EDFA)光源对小耦合系数的保偏光纤偏振的耦合系数进行测量,分别得到0.36%,1.8%和2.5%的测量误差,验证了系统的精确性。