Lithium niobate based (LiNbO<sub>3</sub>) integrated optical sensor with Mach-Zehnder optical waveguide interferometer and
tapered antenna array was designed and fabricated for measuring pulsed electric field with nanosecond width. The
fabricated sensor exhibits relatively flat frequency response with a variation not more than 4 dB from 10 kHz to 5 GHz
and minimum detectable electric field intensity of 0.4 V/m. A 103 V/m pulsed electric field with nanosecond width was
also measured by this integrated optical sensor, the experimental results exhibit the information of EMP can be detected
and extracted by this integrated optical sensor.
In this work, an integrated optical waveguide electric field sensor with segmented electrodes is designed and fabricated
for measurement of lightning impulse electric field. First, the compositions of the sensing system were described briefly.
The calibration of the sensor is taken using an impulse high voltage generator and parallel square electrodes. The
maximal detectable electric field range (-75 kV/m to 245 kV/m) is obtained by analyzing the results. Finally, the
measurements of the lightning impulse electric field are given. As a result, the integrated optical electric field sensor is
suitable for lightning electric field measurement investigation.