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Multi-core fiber grating, fiber sensor, and manufacturing method of multi-core fiber grating

A multi-core optical fiber and grating technology, which is applied in cladding optical fiber, optical waveguide, instrument, etc., can solve problems such as inconvenient engineering application and complex system structure

Inactive Publication Date: 2018-09-04
LASER RES INST OF SHANDONG ACAD OF SCI
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Problems solved by technology

However, in order to eliminate the problem of cross-sensitivity between temperature and strain, each sensor usually requires at least two fiber gratings to be used together. In the monitoring of more complex structural strains, more sensors are needed to measure multi-dimensional structural strains, making the system structure Complex and inconvenient for engineering applications

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  • Multi-core fiber grating, fiber sensor, and manufacturing method of multi-core fiber grating
  • Multi-core fiber grating, fiber sensor, and manufacturing method of multi-core fiber grating
  • Multi-core fiber grating, fiber sensor, and manufacturing method of multi-core fiber grating

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Embodiment Construction

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0022] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...

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Abstract

The embodiments of the invention provide a multi-core fiber grating, a fiber sensor, and a manufacturing method of the multi-core fiber grating, and relate to the technical field of fiber sensors. Themulti-core fiber grating comprises a plurality of fiber cores and a cladding, wherein the cladding is wrapped by the plurality of fiber cores; the target fiber core among the plurality of fiber coresis arranged at the center of the cladding; and when the plurality of fiber cores generate bending strain, the wavelength of each fiber core is provided with different strain response rules so as to measure the amplitude and the direction of the bending strain generated from the plurality of fiber cores. The multi-core fiber grating is simple in structure.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensors, in particular to a method for manufacturing a multi-core optical fiber grating, an optical fiber sensor and a multi-core optical fiber grating. Background technique [0002] Optical fiber sensors have many advantages such as simple structure, good environmental tolerance, anti-electromagnetic interference, and long-distance monitoring. They have been widely used in many fields such as structural health monitoring, power system safety monitoring, oil and gas resource exploration and exploitation, and national defense. Sensors based on fiber gratings are the most important type of fiber optic sensors, which are used to measure various physical quantities such as temperature, stress, and strain. At present, the research on the conventional single-core fiber grating sensor in the manufacturing process and engineering application has been very mature. However, in order to eliminate the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02G01B11/16
Inventor 宋志强王昌祁海峰倪家升刘嘉
Owner LASER RES INST OF SHANDONG ACAD OF SCI
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