Fiber-Optic Temperature Sensor Using Differential LP-Mode Delay Measurement in Weakly-Coupled FMFs

IF 2.5 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2025-09-10 DOI:10.1109/LPT.2025.3605275

Jiarui Zhang;Gang Qiao;Tianliang Lv;Yiran Wang;Lei Shen;Chengbin Long;Baolong Zhu;Wei Chen;Jie Luo;Zhangyuan Chen;Yongqi He;Juhao Li

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引用次数: 0

Abstract

In recent years, different kinds of fiber-optic temperature sensors have been widely applied in various areas such as power systems and environmental monitoring, which are typically built based on temperature-induced influences to interferometers, grating structures or back-scattered light propagation in traditional single-mode fibers (SMF). In this letter, we propose a novel temperature sensing mechanism based on weakly-coupled few-mode fibers (FMF), in which signals in different linearly-polarized (LP) modes could propagate independently through the fiber, and the influence of temperature to differential mode delay (DMD) between LP modes are utilized for the sensing. The simulation model is established and the simulative results show a linearly-increased relation between DMD and temperature variations, which are then experimentally verified based on the DMD measurement for different mode pairs in a 4-LP-mode FMF utilizing white-light interferometry scheme. The proposed sensing mechanism could achieve flexible systematic structures and find high potential in various applications.

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弱耦合FMFs中差分lp模延迟测量的光纤温度传感器

近年来，不同类型的光纤温度传感器被广泛应用于电力系统和环境监测等各个领域，这些传感器通常是基于温度对干涉仪、光栅结构或传统单模光纤（SMF）中背散射光传播的影响而构建的。在本文中，我们提出了一种基于弱耦合少模光纤（FMF）的新型温度传感机制，其中不同线性偏振（LP）模式的信号可以在光纤中独立传播，并利用温度对LP模式之间差模延迟（DMD）的影响进行传感。建立了仿真模型，仿真结果表明DMD与温度变化呈线性增加关系，并利用白光干涉法测量了4- lp模式FMF中不同模式对的DMD。所提出的传感机制可以实现灵活的系统结构，在各种应用中具有很大的潜力。

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

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.