光学
材料科学
折射率
渐变折射率纤维
芯(光纤)
灵敏度(控制系统)
单模光纤
光纤传感器
光子晶体光纤
光纤
模式音量
弯曲分子几何
纤维
光电子学
物理
工程类
电子工程
复合材料
作者
Xiaojun Zhu,Mengqiang Song,Xing Liu,Wen Liu,Yongquan Pan,Juan Cao,Guoan Zhang,Yongjie Yang,Yuechun Shi,Wuming Wu
出处
期刊:Applied Optics
[The Optical Society]
日期:2023-11-13
卷期号:62 (35): 9266-9266
摘要
A highly sensitive temperature and refractive index (RI) sensor based on no-core fiber (NCF) cascaded with a balloon-shaped bent single-mode fiber (BSBSF) is proposed and demonstrated. The NCF can excite higher-order modes which will be concentrated and transmitted into the BSBSF due to the characteristic of self-imaging effect. The BSBSF has an excellent temperature performance due to the high thermo-optical coefficient and thermal expansion coefficient of the polymer coating. The NCF and BSBSF are both conducive to the excitation of higher-order modes, which induces the sensitivity of the sensor with an efficiency improvement. The experimental results show that the maximum temperature sensitivity is −3.19nm/ ∘ C in the range of 22°C–83°C, which is the highest temperature sensitivity in the cascaded BSBSF structure to our best knowledge. In addition, the maximum RI sensitivity is 232.16 nm/RIU when the RI changes from 1.3234 to 1.3512. Compared with other cascaded BSBSF structures, this sensor has a higher temperature sensitivity and can be applicated in the prospects of food, biology, and environmental monitoring.
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