Phase signal analysis for high-sensitive temperature fiber-optic external Fabry-Perot-cavity sensor
DOI:
https://doi.org/10.31349/RevMexFis.70.051302Keywords:
Fabry-Perot interferometer, Optical fiber sensor, Temperature measurement, Phase signal analysis, polymerAbstract
We experimentally demonstrate a highly temperature-sensitive external Fabry-Perot cavity. The interferometric structure is composed of an air-microcavity; its fabrication uses a microcapillary and UV polymer. A temperature sensitivity close to 5.7 nm/ºC is achieved with suitable linearity (0.9896) and minimal hysteresis; a phase analysis technique is proposed and applied to overcome the trade-off between sensitivity and range of operation. This technique provides a competitive sensitivity (0.84 rad/ºC), good linearity (0.9934), and a range of operation from 25 °C to 41 °C.
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Copyright (c) 2024 Tania Lozano-Hernández, Daniel Jáuregui-Vázquez, Julián Moisés Estudillo-Ayala, Erik Diaz-Cervantes, José Alfredo Álvarez-Chavez, Juan Manuel Sierra-Hernández, Herman Offerhaus
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