Temperature and strain-independent curvature sensor based on a singlemode/multimode fiber optic structure

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

Susana Silva (Autor) FCUP; Frazao, O (Autor) FCUP; Viegas, J (Autor) Outra; Ferreira, LA (Autor) Outra; Araujo, FM (Autor) Outra; Xavier Malcata, FX (Autor) Outra; Santos, JL (Autor) FCUP

Revista

Título: Measurement Science and Technology

Vol. 22

Página Final: 085201

ISSN: 0957-0233

Editora: Institute of Physics Publishing

Indexação

ISI Web of Knowledge - 61 Citações

Scopus - 60 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

Outras Informações

ID Authenticus: P-002-PFG

DOI: 10.1088/0957-0233/22/8/085201

Abstract (EN): This work describes a fiber optic sensing structure that is sensitive to curvature, and features a low temperature-and strain cross-sensitivity. It is based on multimode interference, and relies on a singlemode-step index multimode-singlemode fiber structure. It was observed that the transmitted optical power in such a layout is highly sensitive to the wavelength of operation, and to the length of the multimode fiber. The optical spectrum exhibits two dominant loss bands, at wavelengths that have similar responses both to temperature and strain, but different responses to curvature. Based on this result, an interrogation approach is proposed that permits substantial sensitivity to curvature (8.7 +/- 0.1 nm m) and residual sensitivities to temperature and strain (0.3 +/- 0.1 pm degrees C(-1) and (-0.06 +/- 0.01) x 10(-6) m m(-1), respectively). The beam-propagation method was employed for modeling the propagation of light along the optical fiber sensing device proposed.

Idioma: Inglês

Tipo (Avaliação Docente): Científica