Ring core few-mode fiber sensor for curvature measurement

被引：16
|
作者：
Zhang, Fan [1 ,2 ]
Su, Baijin [1 ,2 ]
Zhong, Lixi [1 ,2 ]
Qi, Beibei [1 ,2 ]
Xu, Ou [1 ,2 ]
Qin, Yuwen [1 ,2 ]
机构：
[1] Guangdong Univ Technol, Sch Informat Engn, Adv Inst Photon Technol, Guangzhou 51006, Peoples R China
[2] Guangdong Univ Technol, GuangDong Prov Key Lab Informat Photon Technol, Guangzhou 51006, Peoples R China
来源：
APPLIED OPTICS | 2022年 / 61卷 / 10期
基金：
中国国家自然科学基金;
关键词：
MACH-ZEHNDER INTERFEROMETER; TEMPERATURE; MICROFIBER; STRAIN;
D O I：
10.1364/AO.450660
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
An all-fiberMach-Zehnder interferometer (MZI) using ring core few-mode fiber (RC-FMF) for curvature sensing is proposed and experimentally demonstrated. The MZI was fabricated by splicing a segment of RC-FMF between two pieces of single-mode fiber (SMF). With the benefit of a RC of the central axis of the RC-FMF, the sensor is more sensitive to curvature compared to other fiber sensors based on ordinary SMF or FMF. Curvature measurement can be achieved by monitoring the wavelength shift of interference dips. Experimental results have shown that the sensitivity of curvature sensing can reach up to 4.370 nm/m(-1), within the range of 1.199-1.549m(-1). Also, the temperature sensing characteristics of the sensor are measured, and the maximum temperature sensitivity is 57.6 pm/degrees C, ranging from 25 degrees C to 45 degrees C. The proposed MZI sensor has excellent potential for curvature measurement of building structural health monitoring, bridge engineering, and more. (C) 2022 Optica Publishing Group
引用
收藏
页码：2598 / 2603
页数：6
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