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A Fabry-Perot sensor based on silicon core optical fiber and its preparation and application

A sensor, silicon core technology, applied in the direction of converting sensor output, using optical devices to transmit sensing components, photometry, etc. Effect

Active Publication Date: 2021-08-10
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, many fiber optic sensors are made based on fused silica, limited by the thermo-optic coefficient and thermal expansion coefficient of fused silica, the temperature sensitivity of such sensors is generally small

Method used

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  • A Fabry-Perot sensor based on silicon core optical fiber and its preparation and application
  • A Fabry-Perot sensor based on silicon core optical fiber and its preparation and application
  • A Fabry-Perot sensor based on silicon core optical fiber and its preparation and application

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Embodiment

[0033] A Fabry-Perot sensor based on silicon core optical fiber, which consists of ordinary single-mode optical fiber (1), fiber fusion splicing end face (2), silicon core optical fiber cladding (3), silicon core optical fiber core (4) and polished end face (5) Composition, see figure 1 ; The production process is to first fuse the silicon core fiber with the standard single-mode fiber, and then grind and polish the other end of the silicon core fiber to the required length to form a silicon core fiber Fabry-Perot sensor. When the standard single-mode fiber and silicon core fiber are fused together, the fusion end surface is smooth and flat; the cavity length of the silicon core Fabry-Perot cavity ranges from 1 to 600 μm to ensure that the interference spectrum has a high contrast and a large Free Spectrum Range.

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Abstract

The invention relates to the technical field of optical fiber sensing, in particular to a silicon-core optical fiber-based Fabry-Perot sensor and a preparation method thereof. The Fabry-Perot sensor based on silicon core optical fiber of the present invention comprises ordinary single-mode optical fiber, optical fiber fusion joint end face, silicon core optical fiber and polishing end face, forms fusion joint end face after input optical fiber and silicon core optical fiber fusion, silicon core optical fiber is made of silicon core optical fiber The cladding is composed of the silicon core optical fiber core, the end face of the silicon core optical fiber is polished to form a polished end face, and the fusion end face and the polished end face form two mirror surfaces of the Fabry-Perot cavity of the silicon core optical fiber. The silicon core optical fiber Fabry Perot sensor obtained by the invention has high temperature sensitivity, laser power sensitivity and response speed, and the invention also has the advantages of simple structure, easy manufacture, good repeatability and the like.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to a silicon-core optical fiber-based Fabry-Perot sensor and its preparation and application. Background technique [0002] With its small size, anti-electromagnetic interference, high precision and other advantages, fiber optic sensors have been widely used in aerospace, medical and health, agricultural science and other fields, and can be used to detect various physical quantities, such as temperature, pressure, wind speed, power, humidity , Refractive index, etc. [0003] Common fiber optic temperature sensors include fiber Bragg gratings, long period fiber gratings, Mach-Zehnder interferometers and Fabry-Perot interferometers. Limited by the low thermo-optic coefficient and thermal expansion coefficient of fused silica, the temperature sensitivity of conventional fiber optic sensors has a certain upper limit. For example, the temperature sensitivity of fiber Bragg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/353G01K11/32G01J1/00
CPCG01D5/35312G01D5/35374G01K11/32G01J1/00
Inventor 陈娜李聪聪陈振宜王廷云刘书朋商娅娜
Owner SHANGHAI UNIV
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