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Strain and temperature measurement discrimination with forward Brillouin scattering in optical fibers
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Strain and temperature measurement discrimination with forward Brillouin scattering in optical fibers
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| Sánchez Domínguez, Luis Alberto; Díez Cremades, Antonio; Cruz Muñoz, José Luis; Andrés, Miguel V. | |||
| Aquest document és un/a article, creat/da en: 2022 | |||
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| A novel method that enables simultaneous and discriminative measurement of strain and temperature using one single optical fiber is presented. The method is based on the properties of transverse acoustic mode resonances (TAMRs) of the optical fiber. In particular, it is based on the different sensitivity to temperature and strain that exhibit the radial modes R(0,m) and a family of torsional-radial modes denoted as TR(1)(2,m). We show that the resonance frequencies of both types of resonances shift linearly with temperature and strain, but at different rates. By the combined use of the different sensitivities of the two families of TAMRs, we experimentally demonstrate discriminative measurements of strain and temperature. A detection limit of strain and temperature better than 25 με and 0.2 °C is achieved. | |||
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