High sensitivity FBG humidity sensor coated with graphene and polyimide films,Optical Fiber Technology

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High sensitivity FBG humidity sensor coated with graphene and polyimide films
Optical Fiber Technology ( IF 2.7 ) Pub Date : 2021-07-16 , DOI: 10.1016/j.yofte.2021.102635
Ziwan Li _{1,

2} , Bo Dong ₃ , Enqing Chen _{1,

2} , Yang Li _{1,

2} , Wei Zhao _{1,

2} , Yishan Wang _{1,

2} , Cunxiao Gao _{1,

2}

Affiliation

A high sensitivity FBG humidity sensor coated with polyimide and graphene films is proposed. The sensing probe is based on a fiber Bragg grating coated with an inner polyimide film and an outer graphene film. The sensor shows the high humidity sensitivity and experimental results show that its sensitivity is 1.80 times that of the sensor coated with only polyimide film. Within the humidity range of 30%–70%RH, its sensitivity reaches 19.8 pm/%RH and is almost 25 times that of the other lower sensitivity FBG humidity sensor.

中文翻译：

涂有石墨烯和聚酰亚胺薄膜的高灵敏度 FBG 湿度传感器

提出了一种涂有聚酰亚胺和石墨烯薄膜的高灵敏度 FBG 湿度传感器。传感探头基于涂有内部聚酰亚胺薄膜和外部石墨烯薄膜的光纤布拉格光栅。该传感器显示出高湿度灵敏度，实验结果表明其灵敏度是仅涂有聚酰亚胺薄膜的传感器的1.80倍。在 30%–70%RH 的湿度范围内，其灵敏度达到 19.8 pm/%RH，几乎是其他低灵敏度 FBG 湿度传感器的 25 倍。

更新日期：2021-07-16

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