Open AccessChalcogenide fiber loop probe for the mid-IR spectroscopy of oil products
Author(s) -
Е. А. Романова,
Svetlana Korsakova,
Andrey G. Rozhnev,
А.P. Velmuzhov,
Т.V. Kotereva,
М.В. Суханов,
V.S. Shiryaev
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.380931
Subject(s) - chalcogenide , optics , materials science , spectrometer , optical fiber , fiber , spectroscopy , absorbance , fiber optic sensor , chalcogenide glass , refractive index , optoelectronics , physics , quantum mechanics , composite material
A theoretical approach based on the electromagnetic theory of optical fibers has been applied in the analysis of the evanescent modes of a chalcogenide fiber bend used as a probe in a fiber-based spectroscopic sensor, by the example of the detection of small amounts of an antigel additive in a diesel fuel. The absorbance of the loop probe calculated for each mode was compared with the results of spectrometer-based measurements. The role of the higher-order evanescent modes of a fiber bend has been revealed. The efficiency of using a loop probe has been shown to depend on conditions of light launching into the probe.