Ascorbe Muruzabal, JoaquínCorres Sanz, Jesús MaríaMatías Maestro, IgnacioArregui San Martín, Francisco Javier2018-11-082018-11-0820160925-400510.1016/j.snb.2016.04.045https://academica-e.unavarra.es/handle/2454/31351In this work a high sensitivity optical fiber humidity sensor (OFHS) is presented. The configuration chosen for this purpose is a cladding-etched single mode optical fiber (CE-SMF) coated with a thin film of tin oxide (SnO2). The etching has been made using hydrofluoric acid (HF) and the coating has been fabricated by means of sputtering. Tin oxide was used to build the nano-coating which produces the Lossy Mode Resonance (LMR) and works as sensitive material. Theoretical and experimental results are shown and compared. The device was tested using a climatic chamber in order to obtain the response of the OFHS to relative humidity. Changes greater than 130 nm have been obtained for relative humidity varying from 20% to 90%, which gives a sensitivity of 1.9 nm/%RH.application/pdfeng© 2016 Elsevier B.V. The manuscript version is made available under the CC BY-NC-ND 4.0 license.Lossy mode resonancesCladding-etched single mode optical fiberOptical fiber humidity sensorTin oxideThin filmsArtículo / ArtikuluaAcceso abierto / Sarbide irekiainfo:eu-repo/semantics/openAccess