Publicacoes - INESC TEC

Publicações

Publicações por Orlando Frazão

2006

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

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

Publicação
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.

FecharLer Abstract

2006

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

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

Publicação
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.

FecharLer Abstract

2006

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

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

Publicação
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.

FecharLer Abstract

2006

Optical fibre intensity sensor referenced by stimulated Brillouin scattering

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

Publicação
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.

FecharLer Abstract

2007

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

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

Publicação
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>

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

Publicação
Third European Workshop on Optical Fibre Sensors

Abstract