Near-infrared high sensitivity solute concentration sensor based on lossy-mode resonance of multimode fiber structures coated with aluminum-doped zinc oxide

Patricia Prieto-Cortés; Ricardo I. Álvarez-Tamayo; Manuel García-Méndez; Antonio Barcelata-Pinzón

doi:10.1117/12.2568152

20 August 2020 Near-infrared high sensitivity solute concentration sensor based on lossy-mode resonance of multimode fiber structures coated with aluminum-doped zinc oxide

Patricia Prieto-Cortés, Ricardo I. Álvarez-Tamayo, Manuel García-Méndez, Antonio Barcelata-Pinzón

Author Affiliations +

Proceedings Volume 11462, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVIII; 114622A (2020) https://doi.org/10.1117/12.2568152
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Abstract

We present an optical sensor for solute concentration in solutions by using aluminum-doped zinc oxide (AZO) coatings on silica single-mode/coreless/single-mode and single-mode/multimode/single-mode fiber structures. The fiber sensor is based on the detection of the second lossy-mode resonance (LMR) order of the AZO coated fiber structures which covers the near-infrared C and L wavelength bands. AZO thin films with Zn:Al atomic concentration proportions of 92%:8% were deposited on the fiber structures by radio frequency magnetron sputtering technique. Wavelength displacement of the second order LMR notch as a function of concentration variation on isopropyl-alcohol/glycerin liquid mixtures where measured by a simple optical transmission setup, detected in the 1.55 μm wavelength range. In glycerin concentration percentages (c%) variations from 5% to 30%, maximum sensitivity of 1.42 nm/c% was obtained for coreless-fiber-based structures.

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Patricia Prieto-Cortés, Ricardo I. Álvarez-Tamayo, Manuel García-Méndez, and Antonio Barcelata-Pinzón "Near-infrared high sensitivity solute concentration sensor based on lossy-mode resonance of multimode fiber structures coated with aluminum-doped zinc oxide", Proc. SPIE 11462, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVIII, 114622A (20 August 2020); https://doi.org/10.1117/12.2568152

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