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Sensing fiber used in reflective all-fiber current sensor

A technology of current sensor and sensing fiber, applied in the direction of cladding fiber, optical waveguide light guide, voltage/current isolation, etc., can solve the problems of low utilization rate of equipment, waste of resources, reduced rotation speed, etc., to improve the yield, manufacture The effect of cost reduction and loss reduction

Inactive Publication Date: 2010-11-03
COMCORE OPTICAL TECH
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AI Technical Summary

Problems solved by technology

The three-stress and multi-stress spun fiber can greatly reduce the rotation speed, thereby reducing the loss of the fiber during melting and rotation, and can transmit very circularly polarized light, coupled with the aforementioned twisted fiber 1 / 4 wave plate or 45 °Welded optical fiber 1 / 4 wave plate, the two can form an ideal sensing optical fiber for optical fiber current sensors, but there are currently no commercial products available for triple-stress and multi-stress optical fibers, and they must be made by burning rods and drawing, and this kind of The preparation process of optical fiber is complicated, and it is necessary to have two large and expensive equipments: polarization maintaining optical fiber rod making machine and rotating optical fiber drawing machine
Since the amount of this sensing fiber is very small, the utilization rate of these two expensive devices is very low, resulting in a waste of resources

Method used

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  • Sensing fiber used in reflective all-fiber current sensor
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  • Sensing fiber used in reflective all-fiber current sensor

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Embodiment Construction

[0024] The present invention will be further described below according to the drawings:

[0025] Such as figure 1 As shown, the sensing fiber used in the reflective all-fiber current sensor includes the non-rotating section 1, the spinning section 2 and the uniform rotating section 3 in the online polarization maintaining fiber. The end surface of the uniform rotating section 3 is plated with reflection 膜4。 Film 4.

[0026] The non-rotating section 1 of the linear polarization-maintaining optical fiber is used for butt-welding with the transmission line polarization-maintaining optical cable. Its length is arbitrary, as long as it can be welded. The spin-off section 2 is the optical fiber that starts to rotate at a constant speed when it is melted. The length of this section of optical fiber is usually a few centimeters to ten centimeters. The uniform-speed rotating section of the optical fiber 3 basically maintains a uniform rotation, and its length is generally 1-3 meters; the re...

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Abstract

The invention discloses a sensing fiber used in a reflective all-fiber current sensor. The sensing fiber comprises a polarization-preserving fiber, wherein the polarization-preserving fiber comprises a non-rotating section, a rotation-starting section and a uniform rotation section in turn; and a reflective film is plated at the tail end of the uniform rotation section. The sensing fiber has the characteristics of simple manufacturing and low cost.

Description

Technical field [0001] The invention relates to a sensing optical fiber in a current sensor, in particular to a sensing optical fiber in a reflective all-fiber current sensor for measuring large currents and performing relay protection in high-voltage lines. Background technique [0002] With the rapid economic development today, the capacity of long-distance transmission of power has increased dramatically. In order to reduce the loss of power transmission, increasing the transmission voltage is an effective way. At present, the current measurement and relay protection in high-voltage lines are all current transformers wound by silicon steel sheets and enameled copper wires. With the continuous increase of line voltage, this kind of current transformer has encountered great difficulties in insulation, and the quartz material used to make the optical fiber itself is a good insulator, so the current transformer made of optical fiber can theoretically be at any height It is an ide...

Claims

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Application Information

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IPC IPC(8): G02B6/02G01R19/00G01R15/24
Inventor 姚竑杰
Owner COMCORE OPTICAL TECH
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