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Liquid level sensor based on dynamic Fabry-Perot interferometers in processed capillary fiber

Abstract: In this work, a novel optical fiber sensor capable of measuring both the liquid level and its refractive index is designed, manufactured and demonstrated through simulations and experimentally. For this, a silica capillary hollow-core fiber is used. The fiber, with a sensing length of 1.55 mm, has been processed with a femtosecond laser, so that it incorporates four holes in its structure. In this way, the liquid enters the air core, and it is possible to perform the sensing through the Fabry-Perot cavities that the liquid generates. The detection mode is in reflection. With a resolution of 4 µm (liquid level), it is in the state of the art of this type of sensor. The system is designed so that in the future it will be capable of measuring the level of immiscible liquids, that is, liquids that form stratified layers. It can be useful to determine the presence of impurities in tanks.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Autoría: Roldán-Varona P., Pérez-Herrera R.A., Rodríguez-Cobo L., Reyes-González L., López-Amo M., López-Higuera J.M.,

 Fuente: Scientific Reports, 2021, 11, 3039

Editorial: Nature Publishing Group

 Fecha de publicación: 04/02/2021

Nº de páginas: 10

Tipo de publicación: Artículo de Revista

 DOI: 10.1038/s41598-021-82193-5

ISSN: 2045-2322

Proyecto español: TEC2016-76021-C2-1-R ; TEC2016-76021-C2-2-R ; PID2019-107270RB-C21 ; PID2019-107270RB-C22

Url de la publicación: https://doi.org/10.1038/s41598-021-82193-5