Optical fiber ultraviolet sensor based on Al2O3/ZnO and manufacturing method thereof

Abstract

The invention discloses an optical fiber ultraviolet sensor based on Al2O3 / ZnO optical fiber, which comprises a light source, a leading-in single-mode optical fiber, a first thin-core optical fiber, ahollow-core optical fiber, Al2O3 / ZnO, a second thin-core optical fiber, a leading-out single-mode optical fiber and a spectrometer which are sequentially connected, wherein the light source is a broadband light source, the central wavelength is 155n nm; the single-mode optical fiber in used for receiving and transmitting light of a light source and transmitting the light to the first thin-core optical fiber; the first thin-core optical fiber and the used single-mode optical fiber are butt-welded to generate interference, and an interference signal mode is coupled to a hollow-core optical fiber; the hollow core optical fiber is internally provided with Al2O3 / ZnO, two ends of the hollow optical fiber are oppositely welded with the first thin-core optical fiber and the second thin-core optical fiber, and interference signals are led out of the single-mode optical fiber for output; a spectrometer performs spectral detection on the interference mode led out the single-mode optical fiber and obtains sensing data. The invention also discloses a corresponding manufacturing method. According to the invention, the absorption to ultraviolet is enhanced by means of Al2O3 / ZnO, the system sensitivity is obviously improved, and the optical fiber ultraviolet sensor which is simple to manufacture and convenient to package is obtained.

Description

Technical field [0001] The invention belongs to the technical field of optical fiber sensors, and more specifically, relates to an Al 2 O 3 / ZnO optical fiber ultraviolet sensor and its manufacturing method. Background technique [0002] Ultraviolet detection plays an important role in a wide range of civilian and military applications, including chemical and biological analysis, flame detection, satellite communications, transmitter calibration, and astronomical research. The traditional ultraviolet detector is completed by using a photomultiplier tube, which is fragile, bulky, heavy and costly. However, the wide band gap semiconductor ZnO has attracted more and more attention from researchers. As a unique optoelectronic material, it has obvious band gap, high optical gain and high optical gain in solar cells, lasers, transparent electrodes and light-emitting diodes. Transmittance. Because of its small size, high temperature resistance, corrosion resistance, and strong resista...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects and improvement needs of the prior art, the present invention provides an Al-based 2 o 3 / ZnO optical fiber ultraviolet sensor and its manufacturing method, the purpose of which is to effectively avoid the problem of difficult packaging caused by the production of the sensor cone through the research on the interference properties of the optical fiber and the design of its sensitive parts. 2 o 3 / ZnO composite material enhances the absorption performance of ultraviolet light, so as to prepare a fiber optic ultraviolet sensor with high selectivity and high sensitivity

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