Integrated Optical Waveguide Sensor for Intensive Pulsed Electric Field Measurement

Abstract

A Lithium niobate (LiNbO3) based integrated optical E-field sensor with an optical waveguide Mach-Zehnder interferometer (MZI) and a tapered antenna has been designed and fabricated for measurement of pulsed E-field. Experimental results demonstrate that the minimum detectable E-field of the sensor is 10 kV/m. The linear relationship between the sensor input and output is better while the input E-fields varied from 10 kV/m to 370 kV/m. Besides, from the fitting curve it can be calculated that the maximum detectable E-field of the sensor is approximately equal to 1000 kV/m.

Design and optimization of two-dimensional porous lithium niobate grating birefringent Bloch surface wave sensor with high sensitivity and quality factor

“…The results showed a half-wave electric field of approximately 10135 kV/m and a maximum measurable electric field of about 3041 kV/m. This work provides a new approach for the design and manufacturing of non-metallic high electric field sensors 32 . Hubert et al.…”

Principle and characteristic analysis of electric field sensor

“…Using optical waveguide to form an electro-optical signal modulator similar to Mach-Zehnder interferometer structure, when light passes through the optical waveguide, phase shifts with the same magnitude and opposite directions will occur on both arms or one arm of the optical waveguide due to Pockels effect [8]. The beams on the two arms meet at the output fork, so that the phase shift difference between the two optical signals is converted into light intensity and displayed, and the measured electric field intensity is obtained.…”