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A space magnetic field sensor based on micro-nano optical fiber and its manufacturing method

A micro-nano optical fiber, space magnetic field technology, applied in the size/direction of the magnetic field, the use of magneto-optical equipment for magnetic field measurement, the direction of the instrument, etc. Small size, compact structure, wide frequency response effect

Active Publication Date: 2020-01-24
SHENZHEN JIMUYIDA TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Verdet constant of optical fiber is low, which is 2-3 orders of magnitude lower than that of bulk magneto-optical glass, resulting in low measurement sensitivity of all-fiber magnetic field sensors.

Method used

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  • A space magnetic field sensor based on micro-nano optical fiber and its manufacturing method
  • A space magnetic field sensor based on micro-nano optical fiber and its manufacturing method
  • A space magnetic field sensor based on micro-nano optical fiber and its manufacturing method

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Embodiment Construction

[0020] Such as figure 1 As shown, a spatial magnetic field sensor based on a micro-nano optical fiber at least includes: a micro-nano optical fiber 1 and a magneto-optic glass sheet 2, and the micro-nano optical fiber 1 is made of a single-mode optical fiber through a fusion tapered process with different diameters at both ends. Change, the middle is a micro-nano-scale waist region structure, and the waist region with the micro-nano optical fiber 1 in the middle and the magneto-optical glass sheet 2 are pasted by optical glue 3 to form a waveguide coupling structure. The fusion tapering process belongs to the existing mature technology, so it will not be described too much here.

[0021] When the diameter scale of the fiber reaches the micro-nano level and the micro-nano fiber 1 is formed, the mode field distribution of the fiber will change significantly, and a strong evanescent field energy will be formed around it. Due to the effect of the evanescent field, when the micro-...

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Abstract

The present invention relates to a micro-nanofiber-based space magnetic field sensor and a manufacture method thereof. The micro-nanofiber-based space magnetic field sensor comprises at least a micro-nanofiber (1) and a magneto-optical glass sheet (2); a single-mode optical fiber (4) is subjected to fused biconical taper processing, so that a waist region structure can be formed, the diameters of two ends of the waist region structure being constant, the middle of the waist region structure being at a micro-nano scale; and the micro-nanofiber (1) at the middle of the waist region and the magneto-optical glass sheet (2) are bonded together through an optical adhesive (3) so as to form a waveguide coupling structure. The micro-nanofiber-based space magnetic field sensor of the invention has the advantages of compact structure, small size, no optical path coupling links and high magnetic field measurement sensitivity.

Description

technical field [0001] The invention belongs to the field of electromagnetic measurement and sensing, and in particular relates to a space magnetic field sensor based on a micro-nano optical fiber and a manufacturing method thereof. Background technique [0002] Space magnetic field detection technology plays a vital role in a series of power grid operation processes such as power system grid status monitoring, power equipment fault diagnosis, and electromagnetic compatibility. Traditional magnetic field measurement methods are mainly based on electrical principles and methods. Typical representatives are the electromagnetic induction method and the Hall effect method. Most of these methods use metal conductors or active semiconductors as sensing probes, which not only cause poor electrical safety of the system, but also the metal probe itself will interfere with the distribution of the measured magnetic field, resulting in measurement errors. [0003] Compared with the tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/00G01R33/032
CPCG01R33/0052G01R33/0322
Inventor 李仙丽
Owner SHENZHEN JIMUYIDA TECH CO LTD
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