Optical path difference demodulation method and system for optical fiber sensor and storage medium

The invention relates to the technical field of optical fiber sensors, and particularly provides an optical path difference demodulation method and system for an optical fiber sensor and a storage medium, and the method comprises the steps: obtaining a light source spectrum and an interference spectrum, and carrying out the normalization processing of the interference spectrum, and obtaining a first spectrum; filtering a direct current component of the first spectrum to obtain a wavelength domain interference spectrum, and converting the wavelength domain interference spectrum into a beam domain interference spectrum; obtaining a plurality of spectrum peaks of the beam domain interference spectrum to obtain beams corresponding to the spectrum peaks; acquiring a frequency spectrum corresponding to the beam domain interference spectrum, acquiring an estimated value of a real peak position on the frequency spectrum, and roughly calculating an optical path difference; calculating rough interference levels corresp