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Fiber magnetic optical probe device and its usage system

A magneto-optical and optical fiber technology, applied in the optical field, can solve problems such as near-zero desensitization, and achieve the effect of easy installation and small size

Inactive Publication Date: 2007-11-21
SIEYUAN ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The purpose of the present invention is to provide a new optical fiber magneto-optical probe device and its application system to overcome the shortcoming of near-zero desensitization in the prior art

Method used

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  • Fiber magnetic optical probe device and its usage system
  • Fiber magnetic optical probe device and its usage system
  • Fiber magnetic optical probe device and its usage system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] According to Fig. 1, the optical fiber magneto-optical probe device of the present embodiment comprises input optical fiber 6, input light collimator 5a, first polarization beam splitter 3a, Faraday magneto-optic rotator 1, 1 / 2 wave plate 2, the second polarization Beam splitter 3b, output light collimator 5b and output optical fiber 7, as shown in Figure 1, the first polarized beam splitter 3a and the second polarized beam splitter 3b in the present embodiment adopt the birefringent crystal polarization splitter of flat plate type uniaxial The device can be made of YVO4 crystal, which can separate two mutually orthogonal polarized lights at a certain distance in space, and the light beam is divided into two beams of parallel lights after passing through the first polarization beam splitter 3a, and their polarization states are mutually orthogonal , the second polarization beam splitter 3b is exactly the same as the first polarization beam splitter 3a, so it can combine ...

Embodiment 2

[0093] As shown in FIG. 2 , the difference between this embodiment and Embodiment 1 is that in this embodiment, a first polarization beam splitter 3 d and a second polarization beam splitter 3 e of a wedge-shaped polarization beam splitter are used.

[0094] In this embodiment, the first polarizing beam splitter 3d and the second polarizing beam splitter 3e are also made of uniaxial crystals, which can separate two mutually orthogonal polarized lights at a certain angle. After the light passes through the first polarizing beam splitter 3d, it is divided into two beams whose polarization planes are orthogonal to each other, and the propagation directions of the two beams form a small angle. After they arrive at the second polarization beam splitter 3e, the direction of propagation of the component whose polarization plane is turned 90° relative to the original polarization plane produced by the first polarization beam splitter 3d in each beam will become consistent, although the...

Embodiment 3

[0096] According to Fig. 3, the optical fiber magneto-optical probe device of the present embodiment comprises input optical fiber 6, output optical fiber 7, optical fiber optical collimator 5c, wedge plate type polarization beam splitter 3f, Faraday magneto-optical rotator 1, 1 / 4 wave plate 2b and reflector 4, input optical fiber 6 and output optical fiber 7 are all conducted with fiber optic collimator 5c, in the present embodiment, the crystal optical axis of 1 / 4 wave plate 2b and Faraday magneto-optical rotator 1 two beam output The orthogonal polarization planes of light are at 22.5° or 67.5°.

[0097] As shown in FIG. 3, input fiber 6 introduces light into fiber optic collimator 5c.

[0098] As shown in FIG. 3 , the fiber optic collimator 5c collimates the light and then transmits it to the polarization beam splitter 3f.

[0099] As shown in FIG. 3 , the polarization beam splitter 3 f splits the light into two beams of light, and the two beams of light are polarized lig...

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Abstract

A magnetic-optic probe of optical fiber consists of light being guided by optical fiber and Faraday magneto-optic rotator. It is featured as setting wave plate at back of Faraday magneto-optic rotator to use said wave plate to make rotation of polarization surface on two beams of output lights form said rotator and carrying out magneto-optic induction and polarization detection on two orthogonal polarization components simultaneously in equivalent way.

Description

technical field [0001] The invention relates to optics, in particular to an optical fiber magneto-optical probe device and an application system thereof. Background technique [0002] In a high-voltage high-power DC or AC power transmission system, it is necessary to monitor and measure the current and phase of the high-voltage line in a safe place with zero potential. Compared with the traditional current transformer, the fiber optic sensor used in the detection of current and magnetic field has the characteristics of convenient insulation, high safety, small size, strong anti-interference ability, and low cost. [0003] Hundreds of years ago, Michael Faraday discovered that when linearly polarized light passes through a living stone glass placed in a magnetic field, the polarization plane is deflected. This characteristic is called the Faraday effect, and it has been widely used in the induction of magnetic fields. The rotation amount of the polarization plane is proporti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/032G01R15/24
Inventor 袁海骏
Owner SIEYUAN ELECTRIC CO LTD
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