Temperature-insensitive strain sensor based on four-wave mixing using Raman fiber Bragg grating laser sensor with cooperative Rayleigh scattering

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

Autores

martins, hf (Autor) Outra; marques, mb (Autor) FCUP; frazao, o (Autor) Outra

Revista

Título: Applied Physics B: Lasers and Optics

Vol. 104

Páginas: 957-960

ISSN: 0946-2171

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 19 Citações

Scopus - 23 Citações

Outras Informações

ID Authenticus: P-002-MT8

DOI: 10.1007/s00340-011-4516-1

Abstract (EN): A temperature-insensitive strain sensor based on Four-Wave Mixing (FWM) using two Raman fiber Bragg grating (FBG) lasers with cooperative Rayleigh scattering is proposed. Two FBG were used to form two linear cavities laser sensors based on Raman amplification combined with cooperative Rayleigh scattering. Due to the very low dispersion coefficient of the fiber, it is possible to obtain the FWM using the two lasers. This configuration allows the operation as a temperature-insensitive strain sensor where both sensors have the same sensitivity to temperature but only one of the FBG laser is sensitive to strain. The difference between the wavelengths of the signal sensor and the converted signal presents a strain coefficient sensitivity of 2 pm/mu epsilon with insensitivity to temperature. The FWM efficiency is also dependent on the applied strain, but it is temperature independent, presenting a maximum sensibility of 0.01 dB/mu epsilon.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4