Publications

Publications by Orlando Frazão

2006

Temperature-independent strain measurement using a fibre Bragg grating written in an array of fused tapers

Authors
Silva, SFO; Frazao, O; Santos, JL; Ferreira, LA; Araujo, FM;

Publication
Optics InfoBase Conference Papers

Abstract
A temperature-independent strain sensor using a fibre Bragg grating written in an array fused taper is presented. This structure shows a spectrum with several peaks where their relative amplitudes are independent of temperature variations but change with applied strain. © 2006 OSA/OFS 2006.

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2006

Fibre optic inclinometer based on the combination of a long-period grating and a fused taper

Authors
Frazao, O; Falate, R; Fabris, JL; Santos, JL; Ferreira, LA; Araujo, FM;

Publication
Optics InfoBase Conference Papers

Abstract
A new approach for a fibre optic modal Mach-Zehnder interferometer based on the combination of a fibre taper cascaded with a fibre LPG is presented. It is also demonstrated that such a structure can be applied for the implementation of a fibre optic inclinometer sensor. © 2006 Optical Society of America.

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2006

Bend and temperature sensing with arc-induced phase-shifted long-period fiber grating

Authors
Falate, R; Frazão, O; Rego, G; Ivanov, O; Kalinowski, HJ; Fabris, JL; Santos, JL;

Publication
Optics InfoBase Conference Papers

Abstract
A phase-shifted long-period fiber grating sensor fabricated by electric arc technique is used to measure bending curvature and temperature. © 2006 Optical Society of America.

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2006

Optical fibre intensity sensor referenced by stimulated Brillouin scattering

Authors
Baptista, JM; Marques, JM; Frazao, O; Santos, S; Santos, JL; Marques, MB;

Publication
Optics InfoBase Conference Papers

Abstract
An optical fibre intensity sensor referenced by stimulated Brillouin scattering is presented. The sensor uses Fresnel reflection at the sensor fibre end and employs an adequate relationship between Brillouin and Rayleigh scattering and Fresnel reflection. © 2006 OSA/OFS 2006.

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2007

<title>Evaluation of coupling losses in hollow-core photonic crystal fibres</title>

Authors
Carvalho, JP; Magalhães, F; Ivanov, OV; Frazão, O; Araújo, FM; Ferreira, LA; Santos, JL;

Publication
Third European Workshop on Optical Fibre Sensors

Abstract

2007

<title>In-fibre Mach-Zehnder configuration based on fibre multimode interference structure combined with a long period grating</title>

Authors
Frazão, O; Viegas, J; Caldas, P; Araújo, FM; Ferreira, LA; Santos, JL; Farahi, F;

Publication
Third European Workshop on Optical Fibre Sensors

Abstract