Sensitivity analysis of bent sensing elements of the fiber probes for mid-IR spectroscopy

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Optical and Quantum Electronics Pub Date : 2024-12-02 DOI:10.1007/s11082-024-07837-y

Elena A. Romanova, Alexander P. Velmuzhov, Vladimir S. Shiryaev

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Abstract

Remote analysis of the chemical composition of various substances in real time is a pressing problem. Current development of the fiber based evanescent wave spectroscopy (FEWS) in the mid-infrared range meets modern industrial, environmental, safety and medical needs. This paper presents a sensitivity analysis of the fiber probes for FEWS based on bent chalcogenide fibers as sensing elements. A previously developed methodology is applied to study the sensitivity of bent fiber tapers and bent fibers of constant diameter immersed in a liquid analyte. The wave optics based approach is used in calculations of the attenuation coefficients of the bend modes in the COMSOL Multiphysics solver. For evaluation of the bent fiber taper transmittance, the method of local modes is applied. The sensitivity analysis is carried out for the probes made of chalcogenide fibers of Ge₂₀Se₈₀ composition immersed in an aqueous solution of isopropyl alcohol with concentrations of 0 to 50 vol.%. The results of FEWS measurements with the U-shaped fiber taper of a certain geometry are used for assessment of the analysis outcomes. The role of light launching conditions in the operation of a fiber probe is discussed.

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来源期刊

Optical and Quantum Electronics 工程技术-工程：电子与电气

CiteScore

4.60

自引率

20.00%

发文量

810

审稿时长

3.8 months

期刊介绍： Optical and Quantum Electronics provides an international forum for the publication of original research papers, tutorial reviews and letters in such fields as optical physics, optical engineering and optoelectronics. Special issues are published on topics of current interest. Optical and Quantum Electronics is published monthly. It is concerned with the technology and physics of optical systems, components and devices, i.e., with topics such as: optical fibres; semiconductor lasers and LEDs; light detection and imaging devices; nanophotonics; photonic integration and optoelectronic integrated circuits; silicon photonics; displays; optical communications from devices to systems; materials for photonics (e.g. semiconductors, glasses, graphene); the physics and simulation of optical devices and systems; nanotechnologies in photonics (including engineered nano-structures such as photonic crystals, sub-wavelength photonic structures, metamaterials, and plasmonics); advanced quantum and optoelectronic applications (e.g. quantum computing, memory and communications, quantum sensing and quantum dots); photonic sensors and bio-sensors; Terahertz phenomena; non-linear optics and ultrafast phenomena; green photonics.