Abstract
In this work, a thin-film consisting of 15 bilayers (estimated thickness: 210 nm) of titanium (IV) oxide and poly(sodium 4-styrenesulfonate) is simultaneously deposited onto two optical fiber structures: a single-mode—multimode—single-mode (SMS) device and a lossy mode resonance (LMR)-based device. The performance of both structures, as refractometers and relative humidity sensors, is studied and compared. In both cases, the sensitivity of the LMR-based device (955 nm/RIU and 3.54 nm/RH %, respectively) highly improves the one of the SMS (142 nm/RIU and 0.3 nm/RH %). These facts can be taken into account when developing sensors based on either SMS or LMR technologies.
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Acknowledgments
This work was supported by the Spanish Economy and Competitiveness Ministry project FEDER TEC2013-43679-R and by a Public University of Navarra pre-doctoral research grant. Authors would like to express their gratitude to Nadetech Innovations Inc. for the automation of the deposition processes.
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Socorro, A.B., Hernaez, M., Del Villar, I. et al. Single-mode—multimode—single-mode and lossy mode resonance-based devices: a comparative study for sensing applications. Microsyst Technol 22, 1633–1638 (2016). https://doi.org/10.1007/s00542-015-2793-z
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DOI: https://doi.org/10.1007/s00542-015-2793-z