Radiation enhanced sensitivity of temperature and curvature sensor based on Bi/Er Co-doped fibre with ultra-broadband emission

IF 5.2 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Measurement Pub Date : 2025-05-21 DOI:10.1016/j.measurement.2025.117936

Zhexu Huang , Yanhua Luo , Jianxiang Wen , Tingyun Wang , Chengbo Mou , Wei Chen , Shuen Wei , Weiwen Zou , Xiaohong Sun , Asrul Izam Azmi , Gang-Ding Peng

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Abstract

To accommodate the growing scale and diverse applications of fibre optic sensing networks, a temperature and curvature sensing system suitable for radiation environment is proposed based on Bi/Er co-doped fibre (BEDF) with offset-core and ultra-broadband emission. First, two sections of BEDFs were employed to construct an ultra-broadband light source and a Mach-Zehnder Interferometer (MZI) for the sensing system, respectively. Then, the sensing performance of the MZI was evaluated through simulations and experiment. Especially, the impact of gamma radiation on sensing characteristics was evaluated by comparing MZI sensors based on irradiated and non-irradiated BEDFs. Both simulations and experiment results confirmed that the sensitivity improved due to an increase of the refractive index for the fibre core of BEDF, attributed to radiation-induced refractive index change. The sensing results indicate that for the irradiated BEDF based sensor, the maximum temperature sensitivity at 1592 nm was up to 90 pm/℃ with an increase of 50 %, while the maximum curvature sensitivity at 1550 nm was 5.66 nm/m⁻¹ with an increase of 226 %, respectively. Such sensitivity enhancement further demonstrates that 50 kGy gamma ray irradiated BEDF had an increase of effective refractive index of 10^-3 order. Moreover, the proposed MZI sensing system, featuring a broadband near-infrared emission exceeding 500 nm, exhibits great potential for temperature and curvature detection in the Internet of Things (IoT) and ultra-large-scale sensor networks.

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基于Bi/Er共掺光纤超宽带发射辐射增强灵敏度的温度曲率传感器

为适应光纤传感网络日益扩大的规模和多样化的应用，提出了一种基于偏芯、超宽带发射的双铒共掺光纤（BEDF）的辐射环境温度曲率传感系统。首先，利用两段bedf分别构建超宽带光源和马赫-曾德尔干涉仪（MZI）。然后，通过仿真和实验对MZI的传感性能进行了评价。特别地，通过比较辐照和未辐照bedf的MZI传感器，评估了伽马辐射对传感特性的影响。仿真和实验结果均证实，由于辐射引起的折射率变化，光纤芯的折射率增加，从而提高了灵敏度。传感结果表明，辐照BEDF传感器在1592 nm处的最大温度灵敏度可达90 pm/℃，提高了50%；在1550 nm处的最大曲率灵敏度为5.66 nm/m−1，提高了226%。这种灵敏度的增强进一步表明，50 kGy伽马射线辐照BEDF后，有效折射率增加了10-3个数量级。此外，所提出的MZI传感系统具有超过500 nm的宽带近红外发射，在物联网（IoT）和超大规模传感器网络中显示出巨大的温度和曲率检测潜力。

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来源期刊

Measurement 工程技术-工程：综合

CiteScore

10.20

自引率

12.50%

发文量

1589

审稿时长

12.1 months

期刊介绍： Contributions are invited on novel achievements in all fields of measurement and instrumentation science and technology. Authors are encouraged to submit novel material, whose ultimate goal is an advancement in the state of the art of: measurement and metrology fundamentals, sensors, measurement instruments, measurement and estimation techniques, measurement data processing and fusion algorithms, evaluation procedures and methodologies for plants and industrial processes, performance analysis of systems, processes and algorithms, mathematical models for measurement-oriented purposes, distributed measurement systems in a connected world.