Fiber-optic temperature sensor coated with PDMS thermo-gel film based on etched SMEDS structure

IF 2.6 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Optical Fiber Technology Pub Date : 2025-06-18 DOI:10.1016/j.yofte.2025.104314

Huijing Wei , Xu Wang , Fang Wang

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引用次数: 0

Abstract

In this work, we propose a fiber-optic temperature sensor based on single-mode fiber (SMF) −multi-mode fiber (MMF)-etched dispersion compensating fiber (DCF)-single-mode fiber SMF (SMEDS) fiber structure coated polydimethylsiloxane (PDMS) Thermo-gel film with experimental validation. A single-mode fiber is gradually fused with a section of MMF and DCF in this sensor structure. The central region of the DCF was then etched with hydrofluoric acid (HF) to create a strong evanescent field. Finally, the temperature sensitivity of the sensor was significantly improved by coating the sensor area with PDMS thermos-gel material. The PDMS thermos-gel film material serves as a simple and efficient encapsulation layer that not only protects the sensor’s microstructure from damage but also greatly improves the reliability and durability of the sensor structure. The experimental results show that the sensor has a temperature sensitivity of 0.113 nm/°C over a wide temperature range of 25–95 °C. When compared to fiber optic sensors without PDMS coating, the temperature sensitivity is 2.9 times higher. The small structural design of the SMEDS sensor, along with its easy production method, high-cost efficiency, and stable and reliable mechanical strength, suggests that it has a wide range of significant applications in the temperature sensing industry.

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基于蚀刻SMEDS结构的涂覆PDMS热凝胶膜的光纤温度传感器

在这项工作中，我们提出了一种基于单模光纤(SMF) -多模光纤(MMF)-蚀刻色散补偿光纤(DCF)-单模光纤SMF （SMEDS）光纤结构涂覆聚二甲基硅氧烷（PDMS）热凝胶膜的光纤温度传感器，并进行了实验验证。在这种传感器结构中，单模光纤与一段MMF和DCF逐渐融合。然后用氢氟酸（HF）蚀刻DCF的中心区域，以产生强大的消失场。最后，通过在传感器区域涂覆PDMS热凝胶材料，显著提高了传感器的温度灵敏度。PDMS热凝胶薄膜材料作为一种简单高效的封装层，不仅可以保护传感器的微观结构免受破坏，还可以大大提高传感器结构的可靠性和耐用性。实验结果表明，该传感器在25-95℃的宽温度范围内具有0.113 nm/°C的温度灵敏度。与不涂PDMS涂层的光纤传感器相比，温度灵敏度提高了2.9倍。SMEDS传感器结构设计小巧，制作方法简单，成本效益高，机械强度稳定可靠，在温度传感行业具有广泛的重要应用。

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.