Sensitivity improvement of a humidity sensor based on silica nanospheres on a long-period fiber grating

Diana Viegas; Javier Goicoechea; José Luís Santos; Francisco Moita Araújo; Luís Alberto Ferreira; Francisco J. Arregui; Ignacio R. Matias

doi:10.3390/s90100519

Sensitivity improvement of a humidity sensor based on silica nanospheres on a long-period fiber grating

Diana Viegas^*
, Javier Goicoechea
, José Luís Santos
, Francisco Moita Araújo
, Luís Alberto Ferreira
, Francisco J. Arregui
, Ignacio R. Matias

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

40 Citations (Scopus)

Abstract

This work addresses a new configuration that improves the sensitivity of a humidity sensor based on a long-period fiber grating coated with a SiO ₂-nanospheres film. An intermediate higher refractive index overlay, deposited through Electrostatic SelfAssembly, 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%.

Original language	English
Pages (from-to)	519-527
Number of pages	9
Journal	Sensors
Volume	9
Issue number	1
DOIs	https://doi.org/10.3390/s90100519
Publication status	Published - Jan 2009
Externally published	Yes

Keywords

Electrostatic self-assembly
Humidity sensor
Long-period fiber grating
Nanospheres

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abstract = "This work addresses a new configuration that improves the sensitivity of a humidity sensor based on a long-period fiber grating coated with a SiO 2-nanospheres film. An intermediate higher refractive index overlay, deposited through Electrostatic SelfAssembly, 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\%.",

keywords = "Electrostatic self-assembly, Humidity sensor, Long-period fiber grating, Nanospheres",

author = "Diana Viegas and Javier Goicoechea and Santos, \{Jos{\'e} Lu{\'i}s\} and Ara{\'u}jo, \{Francisco Moita\} and Ferreira, \{Lu{\'i}s Alberto\} and Arregui, \{Francisco J.\} and Matias, \{Ignacio R.\}",

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AU - Viegas, Diana

AU - Goicoechea, Javier

AU - Santos, José Luís

AU - Araújo, Francisco Moita

AU - Ferreira, Luís Alberto

AU - Arregui, Francisco J.

AU - Matias, Ignacio R.

PY - 2009/1

Y1 - 2009/1

N2 - This work addresses a new configuration that improves the sensitivity of a humidity sensor based on a long-period fiber grating coated with a SiO 2-nanospheres film. An intermediate higher refractive index overlay, deposited through Electrostatic SelfAssembly, 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%.

AB - This work addresses a new configuration that improves the sensitivity of a humidity sensor based on a long-period fiber grating coated with a SiO 2-nanospheres film. An intermediate higher refractive index overlay, deposited through Electrostatic SelfAssembly, 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%.

KW - Electrostatic self-assembly

KW - Humidity sensor

KW - Long-period fiber grating

KW - Nanospheres

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JO - Sensors

JF - Sensors

IS - 1

ER -

Sensitivity improvement of a humidity sensor based on silica nanospheres on a long-period fiber grating

Abstract

Keywords

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