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Mode-locked laser type all-fiber current transformer

A technology of current transformer and mode-locked laser, applied in the direction of voltage/current isolation, etc., to achieve the effect of low hardware requirements and poor real-time performance

Inactive Publication Date: 2016-02-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above two demodulation schemes require a large amount of data processing. In order to ensure the real-time performance of the sensor, the simplicity and hardware requirements of the signal processing algorithm are relatively high.

Method used

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  • Mode-locked laser type all-fiber current transformer
  • Mode-locked laser type all-fiber current transformer

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Experimental program
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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] Such as figure 1 As shown, the present invention includes: laser pump source 1, wavelength division multiplexer 2, erbium-doped optical fiber 3, matching optical fiber 4, Y waveguide integrated optical chip used in reverse direction 5, 45° optical fiber melting point 6, piezoelectric ceramic modulation Device 7, delay line optical fiber 8, quarter wave plate 9, optical fiber sensing ring 10, first reflector 11, second reflector 12, signal generator 13, photodetector 14 and oscilloscope 15; by laser pump The light emitted by Puyuan 1 enters one end of the Y waveguide integrated chip 5 used in reverse through the wavelength division multiplexer 2, the erbium-doped fiber 3, and the matching fiber 4. The original linearly polarized light becomes two orthogonal beams of linearly polarized light, respectively propagating along the slow axis X and the ...

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Abstract

The invention discloses a mode-locked laser type all-fiber current transformer, which comprises a laser pumping source, a wavelength division multiplexing device, an erbium-doped fiber, a matched fiber, a reversely used Y waveguide integrated optical chip, a 45-degree fiber melting point, a piezoelectric ceramic modulator, a fiber delay line, a quarter-wave plate, a fiber sensing ring, a first reflection mirror, a second reflection mirror, a signal generator, a photoelectric detector and an oscilloscope. According to the current transformer provided by the invention, the size of current to be detected can be acquired by only detecting mode-locked pulse time domain migration through the oscilloscope in signal demodulation, so that the transformer based on the system does not need complex signal processing, has very low requirements for hardware of the circuit system, and can solve a defect of poor real-time performance of traditional open-loop demodulation and closed-loop demodulation.

Description

technical field [0001] The invention relates to a current transformer, in particular to a mode-locked laser type all-fiber current transformer. Background technique [0002] The all-fiber current transformer has been widely concerned by researchers since it was proposed. Compared with the traditional electromagnetic mutual inductance current transformer, it has many advantages, such as high intrinsic insulation safety, large dynamic range, anti-electromagnetic interference, and Realize remote control, light weight, small size, etc. At present, the structure of all-fiber current transformer is widely studied, such as figure 1 shown. The light emitted by the wide-spectrum light source 16 passes through the fiber coupler 17, is polarized by the polarizer 18 into linearly polarized light, passes through the 45-degree fusion point 6, and is divided into two beams of mutually orthogonal linearly polarized light, and then provided by the signal processing unit 19. The phase modu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R15/24
Inventor 魏兵李宇波周柯江赵昌云卞强
Owner ZHEJIANG UNIV