based on al 2 o 3 Optical fiber ultraviolet sensor of /zno and its manufacturing method

Abstract

The invention discloses based on Al 2 o 3 / ZnO fiber optic UV sensor, including sequentially connected light source, leading single-mode fiber, first thin-core fiber, hollow-core fiber, Al 2 o 3 / ZnO, the second thin-core fiber, leading single-mode fiber and spectrometer, the light source is a broadband light source with a center wavelength of 1550nm; the introduction of single-mode fiber is used to receive and transmit light from the light source, and transmit it to the first thin-core fiber ; The first thin-core optical fiber is aligned with the incoming single-mode optical fiber to generate interference, and the interference signal mode is coupled to the hollow-core optical fiber; the interior of the hollow-core optical fiber is provided with Al 2 o 3 / ZnO, the two ends of which are aligned with the first thin-core fiber and the second thin-core fiber for fusion splicing, and the interference signal is extracted from the single-mode fiber for output; the spectrometer performs spectral detection on the interference mode of the single-mode fiber, and obtains sensing data . The invention also discloses a corresponding manufacturing method. According to the present invention by means of Al 2 o 3 / ZnO enhances the absorption of ultraviolet rays, significantly improves the sensitivity of the system, and obtains a fiber optic ultraviolet sensor that is simple to manufacture and easy to package.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensors, and more specifically relates to an Al-based 2 o 3 Optical fiber ultraviolet sensor of / ZnO and its preparation method. Background technique [0002] UV 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. Traditional UV detectors are done using photomultiplier tubes, which are fragile, bulky, heavy and costly. However, more and more researchers have paid more and more attention to the wide bandgap semiconductor ZnO. As a unique optoelectronic material, it has obvious band gap, high optical gain and high efficiency in solar cells, lasers, transparent electrodes and light-emitting diodes. Transmittance. Due to its small size, high temperature resistance, corrosion resistance and strong resistance to electrom...

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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