Multiplexed optical fiber biochemical sensing using cascaded C-shaped Fabry-Perot interferometers
Date
2019
Authors
Xie, L.
Nguyen, L.V.
Ebendorff-Heidepriem, H.
Warren-Smith, S.
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Journal article
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IEEE Sensors Journal, 2019; 19(22):10425-10431
Statement of Responsibility
Liushun Xie, Linh V. Nguyen, Heike Ebendorff-Heidepriem, and Stephen C. Warren-Smith
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Abstract
A multiplexed fiber sensor is proposed based on Fabry-Perot interferometers formed by serially splicing C-shaped and single mode fibers. We first demonstrate multiplexed refractive index sensing by independently filling and measuring sodium chloride (NaCl) solutions with different concentrations in a two-cavity system. The results show minimal cross-talk between the two interferometers. The dual-cavity interferometric sensor was then applied to biochemical sensing by utilizing polyelectrolyte layer by layer self-assembly followed by the biotin-streptavidin binding mechanism. The proposed sensor solves an important problem in biochemical sensing by providing an ability to simultaneously measure a negative control, critical for reducing false positive measurements.
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© 2019 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information.