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A Parallel Plate Antenna Integrated Optical Waveguide Omnidirectional Electric Field Sensor

A technology that integrates optical waveguides and electric field sensors. It is used in electrostatic field measurement, voltage/current isolation, etc., and can solve problems such as poor low-frequency response.

Active Publication Date: 2020-10-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Note that the transient electric field bandwidth in the above-mentioned high-voltage engineering field is wide (spectral components are mainly distributed in tens of Hz to hundreds of MHz), while the frequency response of existing integrated optical waveguide omnidirectional electric field sensors generally starts from tens of kHz, and the low-frequency response poor

Method used

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  • A Parallel Plate Antenna Integrated Optical Waveguide Omnidirectional Electric Field Sensor
  • A Parallel Plate Antenna Integrated Optical Waveguide Omnidirectional Electric Field Sensor
  • A Parallel Plate Antenna Integrated Optical Waveguide Omnidirectional Electric Field Sensor

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Embodiment 1

[0021] Embodiment 1: as Figure 1-4 As shown, a parallel plate antenna integrated optical waveguide omnidirectional electric field sensor provided by the present invention consists of six pieces of LiNbO on top, bottom, front, back, left and right 3 Wafer 1 is cemented into a square; among them, the front, back and bottom three LiNbO 3 Reflective film 7 is made on the end face of wafer 1, and the reflective integrated optical waveguide MZI 3 composed of input Y-branch optical waveguide and parallel straight waveguide is made on their inner surface by proton exchange technology, and finally on both sides of the arm of the straight waveguide Making metal modulating electrodes 4;

[0022] On six pieces of LiNbO 3 Metal film 2 is made on the outer surface of wafer 1 to form three pairs of parallel plate dipole antennas that are perpendicular to each other by the metal film 2 on the upper surface and the lower surface, the front surface and the rear surface, the left surface and ...

Embodiment 2

[0024] Embodiment 2: as Figure 5 Shown is a measurement system built using the parallel plate antenna integrated optical waveguide omnidirectional electric field sensor provided by the present invention, including:

[0025] A single-wavelength polarization-maintaining laser source 8 is used to generate a linearly polarized beam;

[0026] A polarization-maintaining optical fiber 9 is used to input the linearly polarized light output by the polarization-maintaining light source 8 into a 1×3 polarization-maintaining optical coupler 10;

[0027] A 1×3 polarization-maintaining optical coupler 10, used to divide the optical signal output by the polarization-maintaining light source 8 into three parts;

[0028] A polarization-maintaining optical circulator 11 is used to input optical signals into the parallel-plate antenna-integrated optical waveguide omnidirectional electric field sensor 12, and simultaneously input the light output from the parallel-plate antenna-integrated optic...

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Abstract

The invention relates to a parallel plate type antenna integrated optical waveguide omnidirectional electric field sensor and belongs to the electric field measurement technical field. Six LiNbO3 wafers are bonded together so as to form a square body, so that the integrated optical waveguide omnidirectional MZI (Mach Zehnder Interferometer) type omnidirectional electric field sensor provided by the invention can be formed; reflective integrated optical waveguide MZIs and modulation electrodes are fabricated on the inner surfaces of the front LiNbO3 wafer, the back LiNbO3 wafer, and the lower LiNbO3 wafer, and reflective films are formed on the end surfaces of the tail ends of the three wafers; metal films are fabricated on the outer surfaces of the upper LiNbO3 wafer, the lower LiNbO3 wafer, the front LiNbO3 wafer, the back LiNbO3 wafer, the left LiNbO3 wafer, and the right LiNbO3 wafer, so that three pairs of parallel plate antennas perpendicular to each other in pairs can be formed;and the parallel plate antennas and the modulation electrodes are connected together by connecting wires. The parallel plate type antenna integrated optical waveguide omnidirectional electric field sensor provided by the invention has the advantages of small size, high sensitivity and good low-frequency performance; and the receiving antennas have omnidirectionality and can detect electric fieldsin any direction.

Description

technical field [0001] The invention relates to a parallel plate antenna integrated optical waveguide omnidirectional electric field sensor, which belongs to the technical field of electric field measurement. Background technique [0002] Lightning pulse field, gap discharge electric field, corona discharge electric field, fast transient overvoltage, etc. will directly or indirectly affect the stable operation of power electronic systems. The impact of transient electric field on power transmission and transformation system is becoming more and more significant. The theory and technology of electric field measurement is an important basis for studying the generation mechanism of this kind of transient electric field, obtaining the characteristic parameters of the electric field, studying the electromagnetic protection measures of the system, and designing the insulation parameters of electrical equipment. [0003] Traditional electric field measurements mostly use electroma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/14G01R15/24
CPCG01R15/24G01R29/14
Inventor 张家洪李佳文李川李英娜赵振刚
Owner KUNMING UNIV OF SCI & TECH
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