Brillouin fibre laser discrete sensor for simultaneous strain and temperature measurement |
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Authors: | O Frazão JM Marques JL Santos MB Marques JM Baptista |
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Institution: | (1) INESC Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal;(2) Dep. de Matemática e Engenharias, Universidade da Madeira, Campus da Penteada, 9000-390 Funchal, Portugal;(3) Dep. de Física, FCUP, Rua do Campo Alegre 687, 4169-007 Porto, Portugal |
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Abstract: | In this work, a Brillouin fibre laser sensor for strain and temperature discrimination is presented. The fibre laser sensor
consists of a Fabry–Pérot cavity with 20 m of optical fibre between two Bragg gratings. For the strain measurement, the 20 m
were split in half and in 10 m a pre-tension was applied originating two Brillouin peaks. For the temperature measurement
all of the sensing head was heated. The resolutions achieved were ±1 με and ±1 °C for strain and temperature measurements,
respectively.
PACS 42.81.-I; 42.55.Wd; 42.65.Es |
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Keywords: | |
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