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Lossy Mode Resonance Sensors Based on Double ITO/TiO2 and Triple TiO2/ITO/TiO2 Thin Film Coated Single Mode Fiber Taper

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Abstract

Based on the previously developed computer program for rigorous calculation of modes in optical fibers containing layers of various materials of arbitrary, including nanometer, thickness, the calculation and optimization of single-mode double adiabatic tapers covered with one, two and three-layer films: ITO, ITO/TiO2, TiO2/ITO/TiO2 of equal thickness is performed, with the aim of their application as the environment refractive index sensors. It is shown that in the range of wavelengths 1.00–1.6 µm, two, and in particular, three-layer coatings not only can increase the sensitivity, but also significantly reduce the width of the lossy mode resonance (LMR), which, in turn, leads to a significant increase in the figure of merit (FOM) of the sensor, defined as the sensitivity/width of the LMR.

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Funding

This research was supported by Russian Foundation of Basic Research (Project 20-07-00063).

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Authors and Affiliations

  1. Kotelnikov Institute of Radioengineering and Electronics of the Russian Academy of Sciences, 125009, Moscow, Russia

    E. I. Golant, A. B. Pashkovskii & K. M. Golant

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  1. E. I. Golant
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  2. A. B. Pashkovskii
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  3. K. M. Golant
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Correspondence to K. M. Golant.

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Golant, E.I., Pashkovskii, A.B. & Golant, K.M. Lossy Mode Resonance Sensors Based on Double ITO/TiO2 and Triple TiO2/ITO/TiO2 Thin Film Coated Single Mode Fiber Taper. J. Commun. Technol. Electron. 65, 1457–1459 (2020). https://doi.org/10.1134/S1064226920120086

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