31 August 2000 New fiber optic sensor: application to refractive index sensing
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Proceedings Volume 4074, Applications of Optical Fiber Sensors; (2000) https://doi.org/10.1117/12.397901
Event: Symposium on Applied Photonics, 2000, Glasgow, United Kingdom
Optical fibers are more and more used as chemical sensors. This is, mainly due to their low cost, and their high efficiency to work in harsh and remote environments. Many devices are based on thin film plasmon excitation where a metal coating is evaporated onto the core of an etched optical fiber. In this paper, a new sensor configuration is presented. Instead of exciting surface plasmon waves on a thin film, surface plasma waves are excited on metal islands. The fiber is coated with 3 layers of gold. Each layer is annealed before the next layer is evaporated onto it. this is done to avoid any light leakage, fact which was found on a prior version with only one gold coating. Different sets of fibers were tested and sensitive and reproducible results for liquid with refraction indices varying from 1.3 to 1.7 were obtained.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fabrice Meriaudeau, Fabrice Meriaudeau, A. G. Wig, A. G. Wig, A. Passian, A. Passian, Trinidad L. Ferrell, Trinidad L. Ferrell, } "New fiber optic sensor: application to refractive index sensing", Proc. SPIE 4074, Applications of Optical Fiber Sensors, (31 August 2000); doi: 10.1117/12.397901; https://doi.org/10.1117/12.397901

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