Symmetrical all-fiber Fabry-Perot sensor and manufacturing method thereof
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The technology of a Fab sensor and its manufacturing method is applied in the direction of using optical devices to transmit sensing components, etc., which can solve the problems of high manufacturing cost and achieve the effects of low stripe fineness, small structure, and symmetrical structure
Active Publication Date: 2015-12-23
广州顶盛益电子科技有限公司
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The authorized publication number is CN202748041U's Chinese patent "a fiber optic sensor", which provides an optical fiber sensor that can simultaneously measure temperature and pressure or temperature and acceleration, mainly using laser processing, femtosecond laser processing, particle beam Engraving or electron beam etching processing technology to produce microcavity, the production cost is relatively high
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[0025] The present invention will be further described below in conjunction with the accompanying drawings.
[0026] Such as figure 1 , figure 2 As shown, a symmetrical all-fiber Fab sensor includes: a first single-mode fiber 1, a first multimode fiber 2, a second single-mode fiber 4 and a second multimode fiber 5, and the first single-mode fiber 1 and the first multimode optical fiber 2 are welded by an optical fiber fusion splicer, and the end face of the first multimode optical fiber 2 is corroded with a concave cavity 3, and the second single-mode optical fiber 4 is also fused with the second multimode optical fiber 5, and the A cavity 3 is corroded on the end face of the second multimode optical fiber 5; the length of the cavity 3 is set to 60 microns, the end face of the cavity 3 is set to a circular structure, and the diameter of the end face is set to 62 microns. The first multimode optical fiber 2 and the second multimode optical fiber 5 are butt-connected together...
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Abstract
The invention discloses a symmetrical all-fiber Fabry-Perot sensor, a first single-mode fiber is welded with a first multi-mode fiber, and a second single-mode fiber is welded with a second multi-mode fiber; tail ends of the first multi-mode fiber and the second multi-mode fiber are provided with concave cavities; the concave cavities of the first multi-mode fiber and the second multi-mode fiber are in butt joint with each other to form an FP cavity. According to the symmetrical all-fiber Fabry-Perot sensor and the manufacturing method thereof provided by the invention, the structure is small and exquisite, manufacture is easy and cost is low, the fiber sensor can utilize a chemical corrosion method to obtain a long Fabry-Perot cavity, is symmetrical in structure and low in stripe fineness, is little affected by temperature, and can utilize a phase method based on Fourier transform to realize measurement of pressure and strain under high temperature.
Description
technical field [0001] The invention relates to a symmetrical all-fiber F-P sensor and a manufacturing method thereof, belonging to the technical field of optical fiber sensing. Background technique [0002] Compared with various traditional sensors, the optical fiber sensor has the characteristics of high sensitivity, anti-electromagnetic interference, corrosion resistance, explosion-proof and no interference with the measured field, and can be widely used in industry, agriculture, medicine, national defense, aerospace and navigation, etc. , can measure temperature, pressure, flow, displacement, vibration, acceleration, sound field, current, voltage and other physical quantities. For example, physical quantities such as dynamic temperature and pressure in deep underground environments; physical quantities such as dynamic strain, temperature, and acceleration in safety monitoring systems for bridges or large building structures. [0003] At present, the main methods of maki...
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