材料科学
光纤布拉格光栅
干涉测量
分析化学(期刊)
光学
温度测量
光电子学
波长
物理
化学
热力学
色谱法
作者
Yinggang Liu,Xia Song,Bowen Li,Jing‐fei Dong,Liang Huang,Dakuan Yu,Dejun Feng
出处
期刊:Applied Optics
[The Optical Society]
日期:2020-10-16
卷期号:59 (30): 9476-9476
被引量:14
摘要
A novel seven-core fiber (SCF)-based sensor capable of simultaneous measurement of temperature and strain was proposed and experimentally demonstrated. The sensor consists of a fiber Bragg grating (FBG) and a SCF-based Mach–Zehnder interferometer (MZI). The MZI is formed by splicing a short section of SCF between two single-mode fibers (SMFs), and in the meantime, two fiber tapers that act as light splitter and coupler are formed at both ends of the SCF by the fusion splicing method. In addition, the FBG with a central wavelength of 1547.98 nm is cascaded at the end of one fiber taper, and thus simultaneous measurement of temperature and strain can be realized. The experiment result shows that the SCF-based MZI is only sensitive to temperature and has the higher temperature sensitivity of 93.11 pm/°C, while the FBG is sensitive to temperature and strain with sensitivities of 11.46 pm/°C and 0.627 p m / µ ε , respectively. The corresponding temperature and strain resolutions of the sensor are 0.21°C and 27.95 µ ε , respectively. The proposed sensor has the advantages of simple fabrication and high repeatability and has potential applications in many fields such as engineering machinery and building structure health monitoring.
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