infrared transparent optical fibers evanescent wave sensors

Infrared optical fiber as evanescent wave bio-sensors ...

Chalcogenide glass optical fibers exhibit a large optical transparency in the mid-IR extending typically from 2 to 22 μm for the best compositions. Moreover most of these glasses possess unique thermomechanical properties that enable to shape them into optical fibers exhibiting low optical losses from 2 to about 12 μm. Due to their properties, such fibers can be used to implement remote ...

Infrared optical fiber as evanescent wave bio-sensors ...

Request PDF | Infrared optical fiber as evanescent wave bio-sensors | Chalcogenide glass optical fibers exhibit a large optical transparency in the mid-IR extending typically from 2 to 22 mum for ...

Infrared glass fibers for evanescent wave spectroscopy ...

IR glass optical fibers have been developed in order to optimize their response when they are used as evanescent wave chemical sensors. The diameter of the sensitive part of the fiber can be reduced by tapering the fiber during the drawing process or by chemical polishing. In using an FTIR spectrometer associated with a MCT detector, it was possible to evaluate the influence of the fiber ...

(PDF) Evanescent wave infrared spectroscopy of liquids ...

The potential for skin studies is increased by the development of the flexible fiber optic sensor made from infrared transparent polycrystalline silver halide. ... Fiber-optic evanescent-wave ...

Fiber evanescent wave spectroscopy based on IR fluorescent ...

Jun 28, 2016 · These emitted mid-IR broad bands can probe the vibrational modes of several molecules, e.g. C H, C O or C Cl. Relying on this principle, a mid-IR optical sensor using the mid-IR fluorescence of Pr 3+: Ga-Ge-Sb-S fibers has been developed. The detection principle is based on Fiber Evanescent Wave Spectroscopy (FEWS).

Infrared optical fiber as evanescent wave bio-sensors ...

Chalcogenide glass optical fibers exhibit a large optical transparency in the mid-IR extending typically from 2 to 22 μm for the best compositions. Moreover most of these glasses possess unique thermomechanical properties that enable to shape them into optical fibers exhibiting low optical losses from 2 to about 12 μm. Due to their properties, such fibers can be used to implement remote ...

Fiber evanescent wave spectroscopy based on IR fluorescent ...

Jun 28, 2016 · These emitted mid-IR broad bands can probe the vibrational modes of several molecules, e.g. C H, C O or C Cl. Relying on this principle, a mid-IR optical sensor using the mid-IR fluorescence of Pr 3+: Ga-Ge-Sb-S fibers has been developed. The detection principle is based on Fiber Evanescent Wave Spectroscopy (FEWS).

All - Fiber Evanescent Wave Sensors for the Mid-Infrared ...

E. Romanova, S. Korsakova, A. Rozhnev, M. Sukhanov, A. Velmuzhov, T. Kotereva, and V. Shiryaev, "All - Fiber Evanescent Wave Sensors for the Mid-Infrared Spectroscopy of Liquids," in 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, OSA Technical Digest (Optical Society of America, 2019), paper ch ...

Infrared Fibers - SPIE

However, solid-core IR fibers are ideal evanescent-wave sensors for monitoring chemical processes in the sensitive fingerprint region of the infrared spectrum. In these applications the fiber core is surrounded by the chemical or biological agent, and some portion of the light is coupled out of the core into the surrounding medium.

(PDF) Infrared optical sensors for water quality monitoring

Fiber-optic evanescent wave sensor for in situ determination of non-polar organic compounds in water. ... With the development of mid-infrared transparent optical fibers, conventional ...

US5494798A - Fiber optic evanscent wave sensor for ...

A coupled pair of fiber optic fibers are used an immunoassay device. The fibers are first coupled and then drawn down to a single mode diameter. The coupler senses output ratio change due to chemical, biochemical, bioaffinity, immunogenic-type interactions and other molecular activity occuring within the evanescent field. The fusion joint of the coupler is coated with a first immunoassay ...

Evanescent Wave Absorption Based Fiber-Optic Sensor ...

Evanescent wave absorption (EWA) based fiber-optic sensors have found widespread applications ranging from environmental sensing to biosensing. In these sensors, optical and geometrical characteristics such as optical fiber type (single-mode or multi-mode), fiber core diameter, fiber probe geometry, fiber probe length, etc. , are very important.

(PDF) Fiber-Optic Evanescent Wave Spectroscopy in the ...

Fiber-optic evanescent wave spectroscopy (FEWS) in the mid-infrared region is a powerful tool for the study and analysis of solids, liquids, and gases, and of various mixtures of solids, liquids ...

Multimode Chalcogenide Fibers for Evanescent Wave Sensing ...

Nov 18, 2016 · Abstract: Evanescent wave spectroscopy in the mid-infrared (MIR) is a powerful tool for remote real-time sensing. Chalcogenide fibers transparent in MIR are considered as a base for creation of a fiber-optical platform for the MIR sensing. In this paper, a rigorous theoretical approach has been applied for the analysis of evanescent modes propagation in a multimode chalcogenide fiber ...

Theoretical Analysis of Fiber-Optic Evanescent Wave Sensors

A large penetration depth of an evanescent wave is the key to success for developing a fiber-optic evanescent-wave sensors. In general, the penetration depth of an optical fiber, stripped off its ...

[PDF] Fiber evanescent wave spectroscopy based on IR ...

These emitted mid-IR broad bands can probe the vibrational modes of several molecules, e.g. C-H, CO or C-Cl. Relying on this principle, a mid-IR optical sensor using the mid-IR fluorescence of Pr3+: Ga-Ge-Sb-S fibers has been developed. The detection principle is based on Fiber Evanescent Wave Spectroscopy (FEWS).

Graphene based chalcogenide fiber-optic evanescent wave ...

Mar 01, 2018 · Fiber optic evanescent wave sensor with graphene as an absorption-enhancing layer to measure hemoglobin concentration in human blood is proposed. Previous modal functions and experimental results describing the variation of optical constants of human blood with different hemoglobin concentrations in the near-infrared spectral region are ...

Novel Approach for Design of Fiber-Based Evanescent Wave ...

theory of optical fibers for analysis and opti mization of the fiber-based evanescent wave sensors. ACKNOWLEDGEMENTS This work has been suppo rted by the Russian Science Foundatio n (

Infrared optical fiber as evanescent wave bio-sensors

Mar 23, 2005 · Chalcogenide glass optical fibers exhibit a large optical transparency in the mid-IR extending typically from 2 to 22 μm for the best compositions. Moreover most of these glasses possess unique thermomechanical properties that enable to shape them into optical fibers exhibiting low optical losses from 2 to about 12 μm. Due to their properties, such fibers can be used to

Infrared optical fiber as evanescent wave bio-sensors

Mar 23, 2005 · Chalcogenide glass optical fibers exhibit a large optical transparency in the mid-IR extending typically from 2 to 22 μm for the best compositions. Moreover most of these glasses possess unique thermomechanical properties that enable to shape them into optical fibers exhibiting low optical losses from 2 to about 12 μm. Due to their properties, such fibers can be used to

Infrared fiber optic evanescent wave spectroscopy and its ...

We have been developing a novel infrared fiberoptic system for on-line monitoring of toxic materials in water. The system is based on fiberoptic evanescent wave spectroscopy (FEWS) and it operates in the middle infrared (Mid-IR) spectral range 3μm - 30μm. This spectral range covers the "fingerprint" region where many molecules have characteristic absorption.

Infrared glass fibers for evanescent wave spectroscopy ...

IR glass optical fibers have been developed in order to optimize their response when they are used as evanescent wave chemical sensors. The diameter of the sensitive part of the fiber can be reduced by tapering the fiber during the drawing process or by chemical polishing. In using an FTIR spectrometer associated with a MCT detector, it was possible to evaluate the influence of the fiber ...

Infrared evanescent-absorption spectroscopy with ...

Key words: Chalcogenide glass fiber, remote IR spectroscopy, evanescent absorption, fiber-optic sensors. Introduction To date most of the optical fibers used in remote absorption-type chemical sensors have been based on silica1'2 and to a lesser extent on fluoride glass fibers.3 However, these fibers exhibit significant multipho-

Cladless optical fiber sensor based on evanescent wave ...

Aug 21, 2020 · In this paper, we present a fabricated cladless optical fiber sensor to analyze distilled water solution polluted with methylene blue (MB). The fabricated sensor is based on evanescent wave absorption by the surrounding medium at the core–liquid cladding interface. The response of the optical fiber sensor is mainly related to the MB concentration as well as its refractive index.

Fiber evanescent wave spectroscopy based on IR fluorescent ...

principle, a mid-IR optical sensor using the mid-IR fluorescence of Pr3+: Ga-Ge-Sb-S fibers has been developed. The detection principle is based on Fiber Evanescent Wave Spectroscopy (FEWS). The spectroscopic characterization of praseodymium ions (Pr3+) was performed in

Chalcogenide optical fibers for mid-infrared sensing

Feb 06, 2014 · The most exciting application for this fiber consists in implementing fiber evanescent wave spectroscopy (FEWS). 5, 6 Indeed, the optical sensors operating in the mid-IR region, where the main IR signatures of molecules and biomolecules are located, play an important role in the development of analytical techniques giving in situ information on ...

Mid-infrared fiber optic sensors: potential and ...

Dec 10, 1999 · This review summarizes the potential and perspectives of mid- infrared optical sensing schemes with respect to the most promising fields of application and novel technological developments in this research area. Main attention is paid to sensors utilizing the principle of evanescent wave spectroscopy for the signal generation. With the availability of mid-infrared transparent fiberoptic ...

Evanescent field - Wikipedia

The evanescent wave from an optical fiber can be used in a gas sensor, and evanescent waves figure in the infrared spectroscopy technique known as attenuated total reflectance. In electrical engineering, evanescent waves are found in the near-field region within one third of a wavelength of any radio antenna. During normal operation, an antenna ...

Towards a remote IR fiber-optic sensor system for the ...

Jan 01, 1997 · SEfl#& ACRllp~S ELSEVIER Sensors and Actuators B 38-39 (1997) 83-87 CHEMICAL Towards a remote IR fiber-optic sensor system for the determination of chlorinated hydrocarbons in water M. Jakusch a**, B. Mizaikoff a,R. Kellner a, A. Katzir b a Institute for Analytical Chemistry, Viewa University of Technology, Getreidemarkt 91151, A-1060 Vienna, Austria b Raymondand Beverly

(PDF) IR optical fiber sensor for biomedical applications ...

The measurements are based on the general concept of evanescent wave spectroscopy. To improve the detection of such a sensor the fiber diameter is locally reduced. To qualify this optical sensor, two biomedical applications were experimented. Firstly, spectral imaging of

GLASS MATERIALS FOR OPTICAL FIBERS

optical fibers transparent in infrared spectral region up to 10 µm was performed [21]. Optical losses of these materials prepared by conventional melting were not suitable for long-haul optical communications but suffi-cient for many other applications such as spectroscopy, optoelectronics etc. New materials for fiber sensors, fiber lasers

Development of low-loss IR optical fibers for optical sensors

Dec 31, 1995 · The authors have fabricated stable sulfide and telluride based chalcogenide glasses and characterized their properties. The glasses do not exhibit crystallization upon reheating up to and beyond the fiber draw temperature. They have drawn unclad telluride fibers with a

Biocompatibility of Teâ•fiAsâ•fiSe glass fibers for cell ...

IR evanescent wave spectroscopy and, in particular, the widespread attenuated total reflectance spectroscopy. The same principle also applies to fibers, and permits remote IR spectroscopy to be performed with the appro-priate IR-transparent fibers and a conventional Fourier transform IR spectrometer. The source light is coupled to

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