Volatile organic compound sensor based on HC-PBF band gap movement

Abstract

The invention relates to a volatile organic compound (VOC) sensor based on HC-PBF (Hollow-core photonic bandgap fiber) movement. The sensor is characterized in that: two ends of a HC-PBF are aimed at two single-mode fibers, a minimal interval is reserved at the intermediate, the HC-PBF is arranged in an air chamber (the air chamber which is specially designed is provided with an alignment system and a V-shaped slot with adjustable height), and other ends of the two single-mode fibers are leaded out from the air chamber and are respectively connected with a broadband light source and a spectrometer. Aiming at problems that manufacturing is complex, cost is high, and multiple measurements and micro-scale detection are difficult to realize existing in present VOC sensor technologies, the invention provides the VOC sensor based on HC-PBF movement, and the sensor has the advantages of compact structure, easy manufacturing, repeatable measurement, convenient micro-scale monitoring and high sensitivity, and allows various VOC detection to be realized.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to a volatile organic compound sensor based on bandgap movement of a hollow-core photonic bandgap fiber (HC-PBF). Background technique [0002] Volatile organic compounds (VOCs) are the most common type of air pollutants. They usually refer to organic compounds with a boiling point of 50-250°C that can form vapor at normal temperature and pressure, mainly including benzene series, organic chlorine Compounds, Freon series, organic ketones, alcohols, amines, ethers and esters, etc. VOCs are toxic, irritating and carcinogenic, and will seriously damage the environment and human health. Therefore, it is necessary to develop sensitive, rapid and accurate methods for the determination of VOCs content in air. [0003] At present, the more mature sensors used to measure the VOCs content in the air are mainly divided into semiconductor type sensors and optical fib...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of complex production, high cost, and difficulty in realizing multiple measurements and trace detection in the existing volatile organic compound sensing technology, and to provide a compact structure, easy to manufacture, repeatable measurement, and high sensitivity. Volatile Organic Compounds Sensor Based on Bandgap Movement of Hollow-core Bandgap Photonic Crystal Fiber

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