A fibre optic humidity sensor based on a long-period fibre grating coated with a thin film of SiO2 nanospheres

被引：54

作者：

Viegas, D. ^{[1
,2
]}

Goicoechea, J. ^{[3
]}

Corres, J. M. ^{[3
]}

Santos, J. L. ^{[1
,2
]}

Ferreira, L. A. ^{[1
]}

Araujo, F. M. ^{[1
]}

Matias, I. R. ^{[3
]}

机构：

[1] INESC Porto, P-4200465 Oporto, Portugal

[2] Univ Porto, Fac Ciencias, P-4169007 Oporto, Portugal

[3] Univ Publ Navarra, Pamplona 31006, Spain

来源：

MEASUREMENT SCIENCE AND TECHNOLOGY | 2009年 / 20卷 / 03期

关键词：

humidity sensor; long-period fibre grating; nanospheres; electrostatic self-assembly; DEPOSITION;

D O I：

10.1088/0957-0233/20/3/034002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A novel sensing configuration for measuring humidity based on a long-period fibre grating coated with a thin film of silica nanospheres is proposed. The polymeric overlay is deposited on the grating using the electrostatic self-assembly technique. This thin film changes its optical properties when exposed to different humidity levels that translate into a shift of the resonance wavelength of the fibre grating. Wavelength shifts up to 12 nm in a relative humidity range from 20% to 80% are reported, and it is further demonstrated that such humidity sensitivity has negligible thermal dependence.

引用

页数：4

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