A Fabry-Perot interferometer demodulation method based on correlation detection

In the construction of three-axis inertially stabilized observer platform, the displacement sensor based on optical fiber Fabry-Perot interferometer is used. A Fabry-Perot interferometer demodulation method based on correlation detection is suggested and researched. Contrasted with ordinary demodulation method based on Fast Fourier Transform(FFT), the demodulation method based on correlation detection is suitable in the situation of needing high resolution and avoiding computation burden. And this demodulation method based on correlation detection can evade the interpolation operation which is needed by demodulation method based on FFT. Finally the demodulation method based on correlation detection is validated in real experiments.