Optical fibre electric field sensor

Abstract

The invention is a fiber-optical electric-field sensor namely a photoelectric measuring device, based on electrooptic effecct to measure electric field, including collimation lens, polarizer, lambda / 4 wave piece, electrooptic crystal, polarization detector and coupler lens in order placed in light path. Each optical cell is inserted on organic glass basic body with the flute matching the shape and order of the optical cells, and the optical cells are felted one another and the cells and the glass are also felted by optical glue. The link and test of light-path system is convenient.

Description

technical field [0001] The invention belongs to a photoelectric measuring device, which measures the electric field based on the electro-optic effect. Background technique [0002] The measurement of electric field based on the Pockels electro-optic effect principle has been reported in the literature, see Yan Yongzhi, Wang Dehe, Gao Xicai, etc., Optical fiber voltage and electric field sensor using bismuth germanate electro-optic effect, Piezoelectricity and Acousto-optic, 1986.2, first issue, p.p23 -27; Yang Xiaochun, Yan Yongzhi, Theoretical Analysis and Design of Winkels Components for Optical Fiber Electric Field Sensor, Piezoelectricity and Acousto-Optics, 1986.4, No.2, p.p13-18, this sensor is mainly composed of collimating lens, Polarizer, λ / 4 wave plate, electro-optic crystal, analyzer and coupling lens. The process is: the light emitted by the LED is transmitted to the electric field sensor through the optical fiber, coupled into the polarizer by the collimator le...

AI Technical Summary

Problems solved by technology

This structure has obvious disadvantages: 1. Due to no positioning measures, the optical components are not fixed, and displacement is easy to occur; 2. Since the connection between the lens and the end face of the polarizer is suspended, the structure is unstable, and displacement is easily generated, even Falling off leads to a change in the coupling efficiency between the input lens and the output lens, or even no coupling; 3. Because the structure is not fixed, the bonding is random, and the bonding is often uneven, and the front and rear are misaligned. It is also difficult to make an ideal sensor with a five-dimensional fine-tuning instrument, and it is time-consuming

In short, the stability and reliability of the sensor with the above structure are not high, the processing technology is difficult, the production efficiency is low, and the dispersion is large.

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