一种基于四芯光纤的具有增强曲率和应变灵敏度的新型马赫-曾德尔干涉型光纤传感器。

A Novel MZI Fiber Sensor with Enhanced Curvature and Strain Sensitivity Based on Four-Core Fiber.

作者信息

Zhu Xiaojun, Chen Feijie, Zhuang Haoran, Qian Jiayi, Liu Hai, Cao Juan, Shi Yuechun, Wang Xia, Wu Wuming

机构信息

School of Microelectronics and Integrated Circuits (Jiangsu Key Laboratory of Semi. Dev. & IC Design, Package and Test), Nantong University, Nantong 226019, China.

School of Information Science and Technology, Nantong University, Nantong 226019, China.

出版信息

Micromachines (Basel). 2024 Nov 27;15(12):1427. doi: 10.3390/mi15121427.

DOI:10.3390/mi15121427

PMID:39770181

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11679528/

Abstract

We present a high-sensitivity curvature and strain Mach-Zehnder interferometer (MZI) fiber sensor based on a configuration of no-core fiber (NCF) and four-core fiber (FCF). We used an optical fiber fusion splicer to directly splice a segment of FCF between two segments of NCF, with both the FCF and NCF made of SiO, where the FCF exhibits multi-path interference characteristics that allow for higher sensitivity. The NCF, with its self-focusing property, excites higher-order modes, which split and transmit it into the four cores of the FCF. The experimental results show that within a curvature range of 0.0104 m-0.1515 m, the maximum sensitivity can reach -78.04 dB/m with a high linear value of ~0.99. Additionally, the strain response is also experimentally studied. In the range of 0-600 με, the maximum strain sensitivity is -6.49 pm/με. The sensor demonstrates high curvature and strain sensitivity, indicating its potential applications in sensing measurements.

摘要

我们展示了一种基于无芯光纤（NCF）和四芯光纤（FCF）配置的高灵敏度曲率和应变马赫-曾德尔干涉仪（MZI）光纤传感器。我们使用光纤熔接机将一段FCF直接熔接在两段NCF之间，FCF和NCF均由SiO制成，其中FCF呈现多路径干涉特性，可实现更高的灵敏度。具有自聚焦特性的NCF激发高阶模式，这些模式分裂并传输到FCF的四个芯中。实验结果表明，在曲率范围为0.0104 m - 0.1515 m内，最大灵敏度可达-78.04 dB/m，线性度高达~0.99。此外，还对应变响应进行了实验研究。在0 - 600 με范围内，最大应变灵敏度为-6.49 pm/με。该传感器展示出高曲率和应变灵敏度，表明其在传感测量中的潜在应用。