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 (ZO-PD) 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.