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

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 fi...

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Bibliographic Details
Published in:Journal of communications technology & electronics 2020-12, Vol.65 (12), p.1457-1459
Main Authors: Golant, E. I., Pashkovskii, A. B., Golant, K. M.
Format: Article
Language:English
Subjects:
Communications Engineering
Engineering
Figure of merit
Mathematical analysis
Networks
Novel Radio Systems and Elements
Optical fibers
Optimization
Refractivity
Resonance
Sensitivity
Sensors
Thickness
Thin films
Titanium dioxide
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Summary: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/TiO 2 , TiO 2 /ITO/TiO 2 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.
ISSN:1064-2269
1555-6557
DOI:10.1134/S1064226920120086