Method for manufacturing full-fiber quarter wave plate

A production method and an all-fiber technology, applied in the direction of voltage/current isolation, polarization components, etc., can solve the problems of complex equipment, high cost, and low feasibility, and achieve low production cost, high welding success rate, and simple production equipment Effect

Inactive Publication Date: 2010-01-06
SHANGHAI XINYUE METER FACTORY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Although this solution can guarantee the quality of the quarter-wave plate, it is not feasible because of the complexity of the equipment, high cost, and the need for doping elements in the process.

Method used

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  • Method for manufacturing full-fiber quarter wave plate
  • Method for manufacturing full-fiber quarter wave plate
  • Method for manufacturing full-fiber quarter wave plate

Examples

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Embodiment Construction

[0028] see figure 2 The optical system structure of the Sagnac interferometer annular all-fiber current transformer of the present invention is illustrated.

[0029] Like most optical current transformers, Sagnac interferometric all-fiber current transformers are also made according to the Faraday effect. When the propagation direction of a beam is parallel to the direction of the adjacent magnetic field, then the circular component in the polarization state of the beam must produce a phase shift proportional to the magnetic field strength. The polarity of this phase shift depends on the direction of the magnetic field relative to the propagation of the beam. That is to say, this phenomenon is a non-reciprocal optical process. That is, the total polarization rotation angle after the light beam passes through the quartz fiber core twice forward and backward is not zero, but the superposition of the two rotation angles. If it passes N times, the total rotation angle increase...

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Abstract

The invention discloses a method for manufacturing a full-fiber quarter wave plate. A Sagnac interferometer type full-fiber current transformer comprises modules such as a sensing light path, a transmission fiber from a high-voltage part of 110kV to 550kV to 1,000kV to a control room of a power station, a signal processing electronic circuit, an interface circuit of a merging unit and the like, accords with the standard of IEC 60044-8, and is applicable to the industry of electric transmission and transformation and other situations for measuring high current. A full-fiber current sensor realizes current sensing by changing a phase of circularly polarized light of a (gauge outfit) in a sensitive coil through the current. The method for manufacturing the quarter wave plate, namely a key component for realizing mutual conversion of linearly polarized light and circularly polarized light in the full-fiber current transformer comprises the steps of selecting a wave plate, welding the wave plate, a transmission light path and the sensing light path, and protecting welding spots.

Description

technical field [0001] The invention relates to the field of optoelectronics, in particular to a method for manufacturing an all-fiber quarter-wave plate. Background technique [0002] The transformer is an indispensable and important equipment in the transmission line. Its function is to reduce the high voltage and high current value on the transmission line to the standard value that can be directly measured by the instrument according to a certain proportional relationship, so as to facilitate the direct measurement by the instrument; In addition, the transformer can also be used as a relay protector in addition to being used for measurement. [0003] The structure of the traditional current transformer is basically similar to that of the transformer. They all have the disadvantages of large volume, heavy weight, high cost, difficult maintenance, magnetic saturation, and small dynamic range. It is difficult to meet the development needs of the new generation of power syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G01R15/24
Inventor 薛靓李佳程白洁雁陈殿印陈茵崔宇李荣翔
Owner SHANGHAI XINYUE METER FACTORY
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