High performance ethanol gas sensor based on fiber ring laser with a nematic liquid crystal film embedded Sagnac interferometer

IF 4.9 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Sensors and Actuators A-physical Pub Date : 2025-06-01 Epub Date: 2025-03-17 DOI:10.1016/j.sna.2025.116481

Mingqi Gu , Hailiang Chen , Lida Li

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Abstract

Liquid crystal (LC)-based gas sensors constitute a promising research field owing to their chemical absorptivity and reversible molecular arrangement, which fulfill the requirements of high sensitivity, high resolution, and fast response. In this study, an erbium-doped fiber ring laser (FRL) ethanol gas sensor incorporating a nematic liquid crystal (NLC)-film-embedded Sagnac loop is proposed and experimentally validated. Experimental results demonstrate that the sensor benefits from the high signal-to-noise ratio and narrow linewidth of the FRL, achieving a sensitivity of 0.97 pm/ppm, a resolution (R) of 0.24 nm, a detection limit (DL) of 247.42 ppm, and a quality factor (Q) of 40.69. Compared with ethanol gas sensors based on NLC-film-embedded Sagnac interferometer (SI), the proposed design exhibits 17.5-fold, 7.68-fold, and 10.41-fold improvements in R, DL, and Q, respectively, despite a slight reduction in measurement sensitivity. The FRL-based ethanol gas sensor with an NLC-embedded SI demonstrates superior performance and holds potential for ethanol leakage detection applications.

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基于向列液晶膜嵌入Sagnac干涉仪的光纤环形激光器的高性能乙醇气体传感器

液晶（LC）气体传感器具有化学吸收率高、分子排列可逆等特点，满足高灵敏度、高分辨率和快速响应的要求，是一个很有前景的研究领域。本文提出了一种采用向列液晶(NLC)-薄膜嵌入Sagnac环的掺铒光纤环形激光（FRL）乙醇气体传感器，并进行了实验验证。实验结果表明，该传感器的灵敏度为0.97 pm/ppm，分辨率(R)为0.24 nm，检出限（DL）为247.42 ppm，质量因子(Q)为40.69。与基于nlc薄膜嵌入Sagnac干涉仪（SI）的乙醇气体传感器相比，该设计在R、DL和Q方面分别提高了17.5倍、7.68倍和10.41倍，尽管测量灵敏度略有降低。基于frl的乙醇气体传感器与nnc嵌入式SI展示了卓越的性能，并具有乙醇泄漏检测应用的潜力。

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来源期刊

Sensors and Actuators A-physical 工程技术-工程：电子与电气

CiteScore

8.10

自引率

6.50%

发文量

630

审稿时长

49 days

期刊介绍： Sensors and Actuators A: Physical brings together multidisciplinary interests in one journal entirely devoted to disseminating information on all aspects of research and development of solid-state devices for transducing physical signals. Sensors and Actuators A: Physical regularly publishes original papers, letters to the Editors and from time to time invited review articles within the following device areas: • Fundamentals and Physics, such as: classification of effects, physical effects, measurement theory, modelling of sensors, measurement standards, measurement errors, units and constants, time and frequency measurement. Modeling papers should bring new modeling techniques to the field and be supported by experimental results. • Materials and their Processing, such as: piezoelectric materials, polymers, metal oxides, III-V and II-VI semiconductors, thick and thin films, optical glass fibres, amorphous, polycrystalline and monocrystalline silicon. • Optoelectronic sensors, such as: photovoltaic diodes, photoconductors, photodiodes, phototransistors, positron-sensitive photodetectors, optoisolators, photodiode arrays, charge-coupled devices, light-emitting diodes, injection lasers and liquid-crystal displays. • Mechanical sensors, such as: metallic, thin-film and semiconductor strain gauges, diffused silicon pressure sensors, silicon accelerometers, solid-state displacement transducers, piezo junction devices, piezoelectric field-effect transducers (PiFETs), tunnel-diode strain sensors, surface acoustic wave devices, silicon micromechanical switches, solid-state flow meters and electronic flow controllers. Etc...