The photonic integrated interrogation technology based on array waveguide grating is a hot and difficult research area in the silicon optical field. Compared with traditional interrogation methods, photonic integration interrogation technology based on array waveguide grating has obvious advantages in high-speed and high-precision demodulation of fiber Bragg gratings due to its high demodulation accuracy, fast demodulation speed, and small package size. In recent years, with the development of photonic integration technology, various research institutes, and related organizations have conducted extensive and in-depth research and optimization on the photonic integration interrogation method of array waveguide gratings. This paper introduces the working principle of array waveguide grating and the principle of fiber Bragg grating wavelength
interrogation based on array waveguide grating, combined with the important progress of fiber Bragg grating interrogator based on array waveguide grating in both material system and system performance, summarizes the typical application scenarios of interrogator based on array waveguide grating. The future development of fiber Bragg grating demodulation system is proposed from 3 aspects: new materials, system integration and scale-up, which provides a reference for the research and development of photonic integrated interrogation technology based on array waveguide grating.