Bravo Acha, MikelFernández Vallejo, MontserratEchapare Zabaleta, MikelLópez-Amo Sáinz, ManuelKobelke, J.Schuster, K.2018-10-232018-10-2320131094-4087 (Electronic)10.1364/OE.21.002971https://academica-e.unavarra.es/handle/2454/31115This work experimentally demonstrates a long-range optical fiber sensing network for the multiplexing of fiber sensors based on photonic crystal fibers. Specifically, six photonic crystal fiber sensors which are based on a Sagnac interferometer that includes a suspended-core fiber have been used. These sensors offer a high sensitivity for microdisplacement measurements. The fiber sensor network presents a ladder structure and its operation mode is based on a fiber ring laser which combines Raman and Erbium doped fiber amplification. Thus, we show the first demonstration of photonic crystal fiber sensors for remote measurement applications up to 75 km.7 p.application/pdfeng© 2013 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.photonic crystal fiber sensorsSagnac interferometersMicrodisplacement measurementsRaman-Erbium fiber laserinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess