High-performance fibre-optic humidity sensor based on a side-polished fibre wavelength selectively coupled with graphene oxide film

被引:112
作者
Huang, Yaoming [1 ,3 ]
Zhu, Wenguo [2 ,3 ]
Li, Zhibin [3 ]
Chen, Guanglei [3 ]
Chen, Liheng [3 ]
Zhou, Junjie [3 ]
Lin, Hai [3 ]
Guan, Junwen [3 ]
Fang, Wenxiao [4 ]
Liu, Xin [4 ]
Dong, Huazhuo [3 ]
Tang, Jieyuan [2 ]
Guan, Heyuan [2 ,3 ]
Lu, Huihui [2 ,3 ]
Xiao, Yi [2 ,3 ]
Zhang, Jun [2 ,3 ]
Wang, Hongcheng [5 ]
Chen, Zhe [2 ,3 ]
Yu, Jianhui [1 ]
机构
[1] Jinan Univ, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou 510632, Guangdong, Peoples R China
[2] Jinan Univ, Guangdong Higher Educ Inst, Key Lab Optoelect Informat & Sensing Technol, Guangzhou 510632, Guangdong, Peoples R China
[3] Jinan Univ, Dept Optoelect Engn, Guangzhou 510632, Guangdong, Peoples R China
[4] Elect Produce Reliabil & Environm Testing Res Ins, Guangzhou 510610, Guangdong, Peoples R China
[5] Dongguan Univ, Sch Elect Engn & Intelligentizat, Dongguan 523808, Peoples R China
基金
中国国家自然科学基金;
关键词
Fibre optics; Side-polished fibre; Optical fibre sensing; Graphene oxide; Humidity sensor; OPTICAL MODULATOR; GAS; INTERFEROMETER; SENSITIVITY;
D O I
10.1016/j.snb.2017.08.042
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A high-performance humidity sensor based on a side-polished single-mode fibre (SPF) coated with graphene oxide film was fabricated with a wheel side-polishing technique and spontaneous evaporation. The wavelength-selective coupling gave rise to a loss dip in the transmitted spectrum when a phase match condition was satisfied at a given resonant wavelength. The swelling effect of GO under high RH, which was confirmed by XRD and a spectroscopic ellipsometer, could increase the GO film thickness and led to a redshift at resonant wavelength. Experimental results show that the GO-film-coated SPF (GFC-SPF) is capable of working in two modes: tracing-wavelength mode and intensity variation mode. For the two working modes, the GFC-SPF has high sensitivity, good reversibility, good repeatability and excellent linearity. For the tracing-wavelength mode, a very high sensitivity of 0.145 nm/RH% and a high linear correlation of 99.6% were achieved in a low RH range of 32%-85%, while an ultrahigh sensitivity of 0.915 nm/RH% and a linear correlation of 98.7% were achieved in a high RH range of 85%-97.6%. For the intensity variation mode, a high sensitivity of 0.427 dB/RH% and an excellent linearity correlation of 99.8% were achieved in a wide RH range of 58.2%-92.5%. Such a high performance allows GFC-SPF to have widespread potential applications, such as in the fields of biology, chemical processing and food processing. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:57 / 69
页数:13
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