High-sensitivity fiber grating electric field sensor

The invention discloses a high-sensitivity fiber grating electric field sensor. The high-sensitivity fiber grating electric field sensor comprises an upper metal hemisphere and a lower metal hemisphere; a sensitization amplification mechanism, an optical fiber and an insulating plate are arranged between the upper and lower metal hemispheres; through the two metal hemispheres, electric field signals are sensed; and the design of the sensitization amplification mechanism uses an inverse piezoelectric effect and amplification type sensitization combined method, so that the sensitization effect is more obvious. Voltage signals are transferred to the sensitization amplification mechanism through a lead, so that the sensitization amplification mechanism deforms mechanically; through amplification of the sensitization amplification mechanism, a relatively large deformation amount is output and acts on the optical fiber, so that the central wavelength of the optical fiber changes; and throughdetecting wavelength dri