Please use this identifier to cite or link to this item: http://repositorio.inesctec.pt/handle/123456789/7265
Title: Refractive index sensing using a multimode interference-based fiber sensor in a cavity ring-down system
Authors: Susana Oliveira Silva
Orlando Frazão
Issue Date: 2017
Abstract: This work presents a multimode interference-based fiber sensor in a cavity ring-down system for sensing temperature-induced refractive index (RI) changes of water. The sensing head is based in multimodal interference (MMI) and it was placed inside the fiber loop cavity of the CRD system. A modulated laser source was used to send pulses down into the fiber loop cavity and an erbium-doped fiber amplifier (EDFA) was placed in the fiber ring to provide an observable signal with a reasonable decay time. The behavior of the sensing head to temperature was studied due to its intrinsic sensitivity to said parameter - a sensitivity of -1.6 10(-9) s/C was attained. This allowed eliminating the temperature component from RI measurement of water and a linear sensitivity of 580 mu s/RIU in the RI range of 1.324-1.331 was obtained.
URI: http://repositorio.inesctec.pt/handle/123456789/7265
http://dx.doi.org/10.1117/12.2263437
metadata.dc.type: conferenceObject
Publication
Appears in Collections:Non INESC TEC publications - Articles in International Conferences

Files in This Item:
File Description SizeFormat 
P-00M-SZK.pdf333.35 kBAdobe PDFThumbnail
View/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.