Cable partial discharge monitoring device based on fiber laser sensing technology

The invention discloses a cable partial discharge monitoring device based on an optical fiber laser sensing technology, which comprises a pump light source, an isolator, a coupler, a wavelength division multiplexer and an optical fiber laser sensor, the unbalanced interferometer and the photoelectric conversion module are sequentially arranged at the rear end of the optical fiber laser sensor, pump light emitted by the pump light source is divided into two paths after passing through the isolator and the coupler and enters the optical fiber laser sensor after passing through the wavelength division multiplexer, and vibration generated during cable partial discharge causes vibration of the cantilever beam; the optical fiber laser sensor is used for detecting the partial discharge of the cable, so that the wavelength of light emitted by the optical fiber laser sensor is changed, the wavelength change is converted into the phase change through the unbalanced interferometer, the wavelength information is demodula