title: Ultralong 250 km remote sensor system based on a fiber loop mirror interrogated by an optical time-domain reflectometer.
abstract: A 253 km ultralong remote displacement sensor system based on a fiber loop mirror interrogated by a commercial optical time-domain reflectometer is proposed and experimentally demonstrated. The use of a fiber loop mirror increases the signal-to-noise ratio, allowing the system to interrogate sensors placed 253 km away from the monitoring system without using any optical amplification. The displacement sensor was based on a long period grating spliced inside of the loop mirror, which modifies the mirror reflectivity accordingly to the applied displacement.
authors: Departamento Ingeniería Eléctrica y Electrónica-Universidad Pública de Navarra, Pamplona, Spain. mikel.bravo@unavarra.es
authors: M
authors: M
authors: Bravo
authors: J M
authors: JM
authors: Baptista
authors: J L
authors: JL
authors: Santos
authors: M
authors: M
authors: Lopez-Amo
authors: O
authors: O
authors: Frazão