Using Higher-Order Modes of Chalcogenide Optical Fibers for the Optimization of Evanescent Wave Mid-IR Spectroscopy

On the basis of a new theoretical approach that is proposed for solving tasks of the evanescent wave mid-IR spectroscopy, it is shown that the dispersion properties of higher-order modes of a multimode chalcogenide optical fiber partly immersed into an absorbing medium can be used for the creation o...

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Bibliographic Details
Published in:Technical physics letters 2019-05, Vol.45 (5), p.489-493
Main Authors: Korsakova, S. V., Vinogradova, E. A., Romanova, E. A., Shiryaev, V. S.
Format: Article
Language:English
Subjects:
CHALCOGENIDES
Classical and Continuum Physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CONTROL
Evanescent waves
FIBER OPTICS
Group velocity
INFRARED SPECTRA
Infrared spectroscopy
NEAR INFRARED RADIATION
OPTICAL FIBERS
Optical properties
OPTICAL PUMPING
OPTIMIZATION
Physics
Physics and Astronomy
SENSITIVITY
SENSORS
Spectrum analysis
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Summary:On the basis of a new theoretical approach that is proposed for solving tasks of the evanescent wave mid-IR spectroscopy, it is shown that the dispersion properties of higher-order modes of a multimode chalcogenide optical fiber partly immersed into an absorbing medium can be used for the creation of fiber-optic devices combining the functions of a supercontinuum generator and a sensing element for mid-IR spectroscopic sensors. The propagation of radiation in higher-order modes makes it possible to control the position of zero dispersion of group velocity and to generate supercontinuum with near-IR pumping. Using higher-order evanescent modes in a sensing element, it will be possible to increase its sensitivity and expand the dynamic range.
ISSN:1063-7850
1090-6533
DOI:10.1134/S1063785019050249