材料科学
折射率
功率分配器和定向耦合器
光束传播法
芯(光纤)
光学
混合耦合器
光纤
渐变折射率纤维
纤维
重复性
光纤传感器
灵敏度(控制系统)
温度测量
光电子学
电子工程
物理
化学
复合材料
工程类
色谱法
量子力学
作者
Jincheng Zhao,Bo Han,Yanan Zhang,Yong Zhao
标识
DOI:10.1109/jlt.2023.3249784
摘要
A highly-sensitive all-in-fiber temperature sensor was designed and demonstrated based on a directional coupler by infiltrating self-made refractive index matching fluid (RIMF) into a single eccentric hole-assistant dual-core fiber (DCF). The beam propagation method was used to analyze the coupling characteristics of the single eccentric hole-assistant DCF, which demonstrated that the central core and the suspended core of the DCF would couple to form a directional coupler when the refractive index of the RIMF is between 1.452 and 1.453. Then, this in-fiber directional coupler was fabricated and used for temperature sensing. The experimental results showed that the temperature sensitivity of the sensor could be up to 52.194 nm/°C in the temperature range from 7.207 °C to 10.920 °C. In addition, the sensor had good stability, repeatability, and hysteresis. It is expected to have great potential in highly-sensitive sensing applications.
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