Sensitivity Improvement of a Humidity Sensor Based on Silica Nanospheres on a Long-Period Fiber Grating

被引：30

作者：

Viegas, Diana ^{[1
,2
]}

Goicoechea, Javier ^{[3
]}

Santos, Jose Luis ^{[1
,2
]}

Araujo, Francisco Moita ^{[2
]}

Ferreira, Luis Alberto ^{[2
]}

Arregui, Francisco J. ^{[3
]}

Matias, Ignacio R. ^{[3
]}

机构：

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

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

[3] Univ Publ Navarra, Pamplona 31006, Spain

来源：

SENSORS | 2009年 / 9卷 / 01期

关键词：

Humidity sensor; long-period fiber grating; nanospheres; electrostatic self-assembly;

D O I：

10.3390/s90100519

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

This work addresses a new configuration that improves the sensitivity of a humidity sensor based on a long-period fiber grating coated with a SiO2-nanospheres film. An intermediate higher refractive index overlay, deposited through Electrostatic Self-Assembly, is placed between the fiber cladding and the humidity sensitive film in order to increase the total effective refractive index of the coating. With this intermediate design, a three-fold improvement in the sensitivity was obtained. Wavelength shifts up to 15 nm against 5 nm were achieved in a humidity range from 20% to 80%.

引用

页码：519 / 527

页数：9

共 15 条

[1] ARREGUI FJ, 1999, SENSOR ACTUATOR, V8, P100
[2] Nanofilms on hollow core fiber-based structures:: An optical study
Bravo, Javier
Matias, Ignacio R.
Del Villar, Ignacio
Corres, Jesus M.
Arregui, Francisco J.
[J]. JOURNAL OF LIGHTWAVE TECHNOLOGY, 2006, 24 (05) : 2100 - 2107
[3] Optical fiber humidity sensors using nanostructured coatings of SiO2 nanoparticles
Corres, Jesus M.
Matias, Ignacio R.
Hernaez, Miguel
Bravo, Javier
Arregui, Francisco J.
[J]. IEEE SENSORS JOURNAL, 2008, 8 (3-4) : 281 - 285
[4] Sensitivity optimization of tapered optical fiber humidity sensors by means of tuning the thickness of nanostructured sensitive coatings
Corres, Jesus M.
Arregui, Francisco J.
Matias, Ignacio R.
[J]. SENSORS AND ACTUATORS B-CHEMICAL, 2007, 122 (02): : 442 - 449
[5] Design of pH sensors in long-period fiber gratings using polymeric nanocoatings
Corres, Jesus M.
Matias, Ignacio R.
del Villar, Ignacio
Arregui, Francisco J.
[J]. IEEE SENSORS JOURNAL, 2007, 7 (3-4) : 455 - 463
[6] Nonadiabatic tapered single-mode fiber coated with humidity sensitive nanofilms
Corres, JM
Bravo, J
Matias, IR
Arregui, FJ
[J]. IEEE PHOTONICS TECHNOLOGY LETTERS, 2006, 18 (5-8) : 935 - 937
[7] CUSANO A, 2003, J LIGHTWAVE TECHNOL, V21, P218
[8] Fuzzy nanoassemblies: Toward layered polymeric multicomposites
Decher, G
[J]. SCIENCE, 1997, 277 (5330) : 1232 - 1237
[9] Influence on cladding mode distribution of overlay deposition on long-period fiber gratings
Del Villar, I
Matias, IR
Arregui, FJ
[J]. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 2006, 23 (03) : 651 - 658
[10] Enhancement of sensitivity in long-period fiber gratings with deposition of low-refractive-index materials
Del Villar, I
Matias, IR
Arregui, FJ
[J]. OPTICS LETTERS, 2005, 30 (18) : 2363 - 2365

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