Modified frequency-shifted interferometer：encoding wavelength into phase [Early Posting]
We propose a novel modified frequency-shifted interferometer (MFSI) where a Mach-Zehnder interferometer (MZI) is added in order to obtain wavelength information. We use the Hilbert transform(HT) to extract the wavelength information from the phase of the interference pattern and construct the relationship between phase and wavelength. The laser wavelength measurement experiment is used to verify the compound interferometer.Experimental results demonstrated that our method could obtain the wavelength from the phase, which is of great significance for demodulation Fiber Bragg Grating( FBG) based on frequency-shifted interferometer (FSI).
Chen Xi,Zhou Ciming,Fan Dian,Qian Li,Pang Yandong,Wei Cong ,Zhao Chenguang ,Liang Sijing ,Li Yuxiao . Modified frequency-shifted interferometer：encoding wavelength into phase[J].Chinese Optics Letters,2020,18(10):10.