On-chip integrated demodulator for multi-core optical fiber sensor

An on-chip integrated demodulator for a multi-core optical fiber sensor comprises an optical detector and a broadband light source, an integrated demodulator is arranged in the light output direction of the broadband light source, and the optical detector is arranged in the light path output direction of the integrated demodulator. According to the integrated demodulator, a plurality of first waveguides which are not intersected are inscribed in a transparent glass block to form an optical path separation waveguide and a row of second waveguides with the same number as the first waveguides, and the number of the first waveguides is equal to the number of fiber cores of the tested multi-core optical fiber sensor. One ends of the first waveguides are arranged in parallel in a row to serve as light input ends, the distribution mode of the other ends is the same as the fiber core arrangement mode of the detected multi-core optical fiber, one end of the second waveguide and the first waveguides form an optical wav