title: A highly sensitive fiber optic sensor based on two-core fiber for refractive index measurement.
abstract: A simple and compact fiber optic sensor based on a two-core fiber is demonstrated for high-performance measurements of refractive indices (RI) of liquids. In order to demonstrate the suitability of the proposed sensor to perform high-sensitivity sensing in a variety of applications, the sensor has been used to measure the RI of binary liquid mixtures. Such measurements can accurately determine the salinity of salt water solutions, and detect the water content of adulterated alcoholic beverages. The largest sensitivity of the RI sensor that has been experimentally demonstrated is 3,119 nm per Refractive Index Units (RIU) for the RI range from 1.3160 to 1.3943. On the other hand, our results suggest that the sensitivity can be enhanced up to 3485.67 nm/RIU approximately for the same RI range.
authors.affiliation: Fiber and Integrated Optics Laboratory, Electronics Engineering Department, UAM Reynosa-Rodhe, Universidad Autónoma de Tamaulipas, Carr. Reynosa-San Fernando S/N, Reynosa, Tamaulipas 88779, Mexico. darrioja@uat.edu.mx.
authors.forename: José Rafael
authors.initials: JR
authors.lastname: Guzmán-Sepúlveda
authors.forename: Rafael
authors.initials: R
authors.lastname: Guzmán-Cabrera
authors.forename: Miguel
authors.initials: M
authors.lastname: Torres-Cisneros
authors.forename: José Javier
authors.initials: JJ
authors.lastname: Sánchez-Mondragón
authors.forename: Daniel Alberto
authors.initials: DA
authors.lastname: May-Arrioja
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012212:Rheology / Q000295:instrumentation*; D012680:Sensitivity and Specificity; D012996:Solutions / Q000737:chemistry*; D014159:Transducers
chemical_list: D012996:Solutions