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.

中文翻译：

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基于双ITO / TiO 2和三重TiO 2 / ITO / TiO 2薄膜涂层单模光纤锥度的有损模谐振传感器

摘要

基于先前开发的计算机程序，用于严格计算包含任意材料的层（包括纳米，厚度）的光纤中的模式，计算和优化覆盖有一层，两层和三层膜的单模双绝热锥度： ITO，ITO / TiO ₂，TiO ₂ / ITO / TiO ₂以它们作为环境折射率传感器的应用为目的，进行厚度相等的膜。结果表明，在波长1.00-1.6 µm的范围内，两层（尤其是三层）涂层不仅可以提高灵敏度，而且还可以显着减小有损模共振（LMR）的宽度，进而降低了，导致传感器的品质因数（FOM）显着增加，定义为LMR的灵敏度/宽度。