Photoelectric integrated three-dimensional electric field sensor system

Abstract

The invention relates to an optoelectronic integration three-dimensional electric field sensor system, and belongs to the technical field of electric field measurement. The system comprises a laser source, a polarization-maintaining fiber coupler, an input polarization-maintaining optical fiber, a polarizer, a polarization-maintaining tail optical fiber, a sensing head, a polarization beam splitter, an output single mode fiber and a photoreceiver, wherein the output end of the laser source is connected with the input end of the sensing head through the polarization-maintaining fiber coupler, the input polarization-maintaining optical fiber, the polarizer and the polarization-maintaining tail optical fiber in turn, and the output end of the sensing head is connected with the input end of the photoreceiver through the polarization-maintaining tail optical fiber, the polarization beam splitter and the output single mode fiber. The sensing head comprises three parallel through optical waveguides which are formed on the surface of a lithium niobate plate through titanium diffusion; and a vertical dipole antenna and an electrode are laid on two sides of the surface of the first optical waveguide, and a shielding electrode is laid on the surface of the third optical waveguide. The optoelectronic integration three-dimensional electric field sensor system is suitable for detecting three-dimensional electric fields, has the advantages of simple process and high spatial resolution, and can realize close measurement.

Description

technical field [0001] The invention belongs to the technical field of electric field measurement, and relates to a photoelectric integrated electric field sensor based on the electro-optic effect, which can be applied to the measurement of three-dimensional electric fields, and is especially suitable for proximity measurement under the condition of high electric field amplitude. Background technique [0002] Electric field measurement is facing more and more demands: in the field of electromagnetic compatibility, the measurement of radio frequency electric field can be used to study the electromagnetic radiation generated by electronic equipment, and at the same time, it can detect the influence of external electric field on electronic equipment itself. Such electric field has amplitude Low and high frequency characteristics. In the power system, the measurement of DC, power frequency and transient electric field can be used to evaluate the insulation safety of equipment, a...

AI Technical Summary

Problems solved by technology

It can be seen from Equation 1 that this kind of common path interferometer electric field sensor is modulated by electric fields in both X and Y directions at the same time, and can only be applied to electric field measurements with known directions.

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