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Temperature-independent torsion sensor based on “figure-of-eight” fiber loop mirror

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Resumo:An interrogation sensor system combining the “figure-of-eight” fiber loop mirror using a single directional 3×3 fiber optic coupler was proposed. One fiber loop mirror was formed by inserting a length of high birefringent optical fiber at the input ports of the 3×3 coupler. Splicing the output ports of the 3×3 coupler between them created the other fiber loop mirror. The introduction of this second loop gave rise to two polarization states of light with the same frequency but different optical phase. The mechanical torsion sensing head was located at the second loop and was exhibited an average modulus torsion sensitivity of 7.9×10−4 degree/dB. The performance of the sensor was not affected by environmental temperature variations.
Autores principais:Silva, Ricardo M.
Outros Autores:Lobo Ribeiro, Antonio B.; Frazão, Orlando
Assunto:Torsion sensor Fiber loop mirror Interferometer
Ano:2012
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Universidade Fernando Pessoa
Idioma:inglês
Origem:Repositório Institucional - Universidade Fernando Pessoa

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