Vernier-effect-enhanced PMMA-filled optical fiber dual-FPI for ultrasensitive humidity sensing

IF 2.7 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2025-09-06 DOI:10.1016/j.yofte.2025.104383

Fei Xie, Lili Liang, Rui Liu, Kang Yang, Sumei Jia, Guoyu Li, Yan Li

引用次数: 0

Abstract

We propose a high-sensitivity optical fiber humidity sensor leveraging the vernier effect within a PMMA-filled dual-FPI structure. The device comprises two single-mode fibers, one end-coated with gold, forming a cavity filled with PMMA as the humidity-sensitive medium. By precisely controlling the PMMA curing position, a dual-FPI configuration is achieved that utilizes the vernier effect. Humidity-induced volumetric expansion and refractive index changes in PMMA are amplified via this effect, resulting in significant spectral envelope shifts. Experimental results demonstrate excellent performance across a 30 %–80 % RH range, with sensitivities of 3.34 nm/%RH (increasing) and 3.45 nm/%RH (decreasing). The sensor benefits from a simple structure and good stability, indicating promising potential for practical applications.

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用于超灵敏湿度传感的游标效应增强pmma填充光纤双fpi

我们提出了一种高灵敏度光纤湿度传感器，利用pmma填充双fpi结构中的游标效应。该装置包括两根单模光纤，一端镀金，形成一个填充PMMA作为湿度敏感介质的空腔。通过精确控制PMMA固化位置，实现了利用游标效应的双fpi配置。湿度引起的PMMA的体积膨胀和折射率变化通过这种效应被放大，导致显著的光谱包络偏移。实验结果表明，在30% - 80% RH范围内具有优异的性能，灵敏度分别为3.34 nm/%RH（增加）和3.45 nm/%RH（降低）。该传感器结构简单，稳定性好，具有广阔的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optical Fiber Technology 工程技术-电信学

CiteScore

4.80

自引率

11.10%

发文量

327

审稿时长

63 days

期刊介绍： Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews. Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.