Optical fiber sensor and manufacturing method thereof

Abstract

The invention relates to an optical fiber sensor and a manufacturing method thereof. The optical fiber sensor is prepared by sectioning, melting and stretching a microstructure optical fiber. The optical fiber sensor comprises a fiber core and an air hole structure wrapping layer which wraps the fiber core; the optical fiber sensor is divided into a plurality of regions in the axial direction; thediameters of the fiber core in the regions are the same; the diameters of the fiber core in different regions are different; air holes of the air hole structure wrapping layer in different regions are filled with the same refractive index matching solution; and the optical fiber sensor is prepared by sectioning, melting and stretching the microstructure optical fiber, realizing the fiber core difference of the sections by controlling the melting degree of the sections, and finally filling the air holes of the stretched microstructure optical fiber with the same refractive index matching solution. According to the manufacturing method, the welding loss caused by a traditional welding integration method is avoided, and the integration number of optical fiber sensors is increased; and in addition, only one refractive index matching solution is needed for filling in the method, so that the manufacturing difficulty of the optical fiber sensor is reduced.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to an optical fiber sensor and a manufacturing method thereof. Background technique [0002] Multi-fiber sensor integration technology and measurement method is one of the indispensable technologies for fiber sensor network integration. At present, the commonly used integration methods include wavelength division multiplexing technology, space division multiplexing technology, time division multiplexing technology, and Raman scattering, Distributed fiber-optic temperature or stress sensing network by Brillouin scattering technique. With the demand of sensing technology and modern monitoring technology, it is still necessary to explore new sensors and integration methods to improve the sensing sensitivity and the monitoring range of the sensor network. The four-wave mixing effect is a nonlinear optical effect caused by the interaction of four light waves in...

AI Technical Summary

Problems solved by technology

[0005] The invention provides an optical fiber sensor and a manufacturing method thereof, which are used to solve the problem of fusion integration between integrated optical fiber sensors in the prior art, the large fusion loss leads to a limitation of the number of integrated optical fiber sensors, and the integrated optical fiber sensors need to be filled with different Refractive index matching fluid leads to technical problems that are difficult to manufacture

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