A kind of optical fiber sensor and its manufacturing method

Abstract

The invention relates to an optical fiber sensor and a manufacturing method thereof. The optical fiber sensor is obtained by segmental melting and stretching of a microstructured optical fiber, and includes a fiber core and an air hole structure cladding wrapped outside the fiber core. The fiber sensor is divided along the axial direction. There are several partitions, the core diameters in each partition are the same, and the core diameters in different partitions are different, and the air holes in the air hole structure cladding of different partitions are filled with the same refractive index matching liquid; the optical fiber sensor is made of microstructured optical fibers through Segmented melting and drawing, and controlling the degree of melting in each segment to achieve the core difference of each segment, and finally filling a refractive index matching liquid in the air holes of the stretched microstructured optical fiber. The manufacturing method avoids the fusion loss caused by the traditional welding integration method, and increases the number of optical fiber sensors that can be integrated; and the method only needs to be filled with a refractive index matching liquid, which reduces the difficulty of manufacturing the optical fiber sensor.

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 methods are one of the indispensable technologies for the integration of optical fiber sensor networks. Currently, 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 with Brillouin scattering technique. With the demand for sensing technology and modern monitoring technology, it is still necessary to explore new sensors and integration methods to improve sensing sensitivity and monitoring range of sensor networks. The four-wave mixing effect is a nonlinear optical effect caused by the interaction of four light wave...

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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