Humidity sensing by tailoring light absorption of SiO2/bromophenol blue (BPB) thin film on optical fiber

被引：1

作者：

Zhang, Hengheng ^{[1
,2
,3
]}

Lai, Min ^{[1
,2
,3
]}

Chen, Yuxin ^{[1
,2
,3
]}

Qi, Yutong ^{[1
,2
,3
]}

Zhu, Bao ^{[1
,2
,3
]}

Xiao, Xuefei ^{[1
,2
,3
]}

Zhou, Xingchen ^{[1
,2
,3
]}

Ma, Yan ^{[1
,3
,4
]}

机构：

[1] Nanjing Univ Informat Sci & Technol, Jiangsu Key Lab Optoelect Detect Atmosphere & Ocea, Nanjing 210044, Peoples R China

[2] Nanjing Univ Informat Sci & Technol, Jiangsu Int Joint Lab Meteorol Photon & Optoelect, Nanjing 210044, Peoples R China

[3] Nanjing Univ Informat Sci & Technol, Sch Phys & Optoelect Engn, Nanjing 210044, Peoples R China

[4] Nanjing Univ Informat Sci & Technol, NUIST Reading Acad, Nanjing 210044, Peoples R China

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2024年 / 63卷 / 07期

基金：

中国国家自然科学基金;

关键词：

humidity sensing; evanescent wave; SiO2/BPB thin film; fiber optic sensor; SENSOR; SENSITIVITY;

D O I：

10.35848/1347-4065/ad5978

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The fabrication of an evanescent wave fiber optic humidity sensor based on bromophenol blue (BPB) doped SiO2 thin film was demonstrated, modulating in light intensity. The sensing film was coated on a fiber core via a single-step dip coating method, followed by sol-gel processing of the precursor. A good exponential relationship was established between output light intensity and relative humidity. The sensor exhibited a high sensitivity and fast response and recovery, as well as low hysteresis, good stability and repeatability. Adsorption of ambient water triggered a ring-opening reaction of BPB, which enhanced light absorption of the sensing film significantly and affected the transmission of the evanescent wave.

引用

页数：5

共 12 条

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