Novel D type microstructure-based optical fiber sensor and preparation method thereof

Abstract

The invention, which belongs to the technical field of light sensing, relates to a novel D type microstructure-based optical fiber sensor and a preparation method thereof. On the basis of a D type LMRmicrostructured fiber, a D type LMR microstructured fiber beyond the diameter, formed by using a fiber core as a circle center, of an LMR microstructured fiber is removed to keep a complete fiber core. The D type LMR microstructured fiber comprises a fiber core, a semi-circular cladding and air holes being disposed between the fiber core and the cladding. The fire core and boundary isolation layers that are arranged at the two sides of the fiber core and are spaced by the air holes form a smooth plane; a a TiO2 film layer is plated on the plane; and the TiO2 film layer is plated with a HfO2 film layer. With increasing of the percentage contributed by the HfO2 thickness, the sensitivity rises to be much higher than a value obtained by a single TiO2 film, so that the stability and sensitivity of the sensing are improved effectively. Therefore, problems of difficult uniform film plating and low sensitivity in the microstructured fiber in the prior art are solved. The fiber sensor havinga simple structure and being easy to implement can be promoted widely in fields like the microstructured fiber.

Description

technical field [0001] The invention belongs to the technical field of light sensing, and relates to a novel D-type microstructure optical fiber sensor and a preparation method thereof. Background technique [0002] In recent years, with the development of economy and society, rapid and effective detection in food safety, environmental monitoring, chemical analysis, biosensing and other fields is an urgent problem to be solved. Especially in the fields of life medicine, traditional energy exploration, ocean development, etc., the requirements for detection indicators are constantly improving. demanding. [0003] Optical fiber sensors have incomparable advantages over traditional sensors: high sensitivity, large dynamic range, fast response, free from electromagnetic interference, explosion-proof and flame-proof, easy to remote telemetry, good confidentiality, light weight, high mechanical strength, etc. Therefore, fiber optic sensors have been widely used in many fields. ...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems in the prior art that the air holes of the microstructure sensing structure are not easy to be coated and filled with analytes, and photonic crystal fibers of other structures cannot be uniformly coated, the present invention proposes a new D-type microstructure optical fiber sensor and its preparation method

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