Polyimide tube-encapsulated FBG sensor with temperature compensation based on OCMI and Vernier effect for humidity measurement

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

Optical Fiber Technology Pub Date : 2025-10-09 DOI:10.1016/j.yofte.2025.104426

ShiTong Zhong , GongQiang Li , HaiTao Yan , DaoFu Han

引用次数: 0

Abstract

We propose a humidity sensor with temperature compensation based on optical carrier interference (OCMI) and an enhanced Vernier effect. The sensor head consists of a sensing fiber Bragg grating (FBG) bonded with a polyimide (PI) tube and two reference FBGs with special packaging. The interferograms formed by the two reference FBGs and the sensing FBG superimpose to generate a Vernier effect. Due to the opposite directional shifts of the two interferograms with respect to humidity variations, an enhanced Vernier effect is further achieved. The humidity sensitivity of the enhanced Vernier effect is −3.867 MHz/%RH amplified by a factor −56.7 and 56.8 respectively compared to the individual OCMIs. The temperature sensitivity of the reference FBGs with specialized packaging closely matches that of the sensing FBG, ensuring effective temperature compensation within the system.

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基于OCMI温度补偿和游标效应的聚酰亚胺管封装光纤光栅传感器用于湿度测量

我们提出了一种基于光载波干涉（OCMI）和增强游标效应的温度补偿湿度传感器。传感器头部由一个与聚酰亚胺（PI）管结合的传感光纤布拉格光栅（FBG）和两个具有特殊封装的参考光纤光栅组成。由两个参考FBG和传感FBG形成的干涉图叠加产生游标效应。由于两个干涉图相对于湿度变化的相反方向移动，进一步实现了增强的游标效应。与单个ocmi相比，增强游标效应的湿度灵敏度为−3.867 MHz/%RH，分别放大了−56.7和56.8倍。经过特殊封装的参考FBG的温度灵敏度与传感FBG的温度灵敏度密切匹配，确保系统内有效的温度补偿。

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.