Effect of metal coating on the optical losses in heated optical fibers

2009 ◽  
Vol 35 (4) ◽  
pp. 365-367 ◽  
Author(s):  
V. V. Voloshin ◽  
I. L. Vorob’ev ◽  
G. A. Ivanov ◽  
V. A. Isaev ◽  
A. O. Kolosovskii ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Metal Coating ◽  
Optical Losses

Ni-Coated Optical Fibers by Electroless Plating

2000 ◽  
Vol 6 (S2) ◽  
pp. 456-457
Author(s):  
Yuli Lin ◽  
Li-Jang Hwang
Keyword(s):  
Optical Fibers ◽  
Vapor Deposition ◽  
Nuclear Power ◽  
Power Plants ◽  
Linear Expansion ◽  
Chemical Vapor ◽  
High Strength ◽  
Metal Coating ◽  
Chemical Plants ◽  
Silica Substrate

Optical fibers have been extensively employed in a variety of fields. However, the need of high strength, excellent resistance to moisture permeation and tolerance to heat becomes apparent when such optical fibers are used in nuclear power plants and chemical plants in particular. Plastic coatings as conventional made of optical fibers cables would be replaced by the optical fiber coated with a layer of metal.Several techniques have been applied to make a metal coating for the optical fibers. Dipping method, to pass optical fibers through a bath containing metal melt, was found the simplest. This dipping method, however, suffers from a disadvantage of a generation of a microbent due to the differences of the linear expansion between metal and the silica substrate [1]. Moreover, the control of the thickness was found difficult using the dipping method. Chemical vapor deposition was also used to form the metal coating on optical fibers.

Strength and Reliability of Metal-Coated Optical Fibers at High Temperatures

1998 ◽  
Vol 531 ◽  
Author(s):  
A. S. Biriukov ◽  
V. A. Bogatyrjov ◽  
V. F. Lebedev ◽  
A. A. Sysolyatin ◽  
A. G. Khitun
Keyword(s):  
Experimental Study ◽  
Melting Point ◽  
High Temperatures ◽  
Optical Fibers ◽  
Temperature Effects ◽  
Degradation Mechanism ◽  
Copper Coating ◽  
Mechanical Reliability ◽  
Optical Losses ◽  
Fiber Degradation

AbstractHermetically metal coated fibers are candidates for applications at high temperatures. To date, various metals with melting point up to 1400 °C have been used to coat fibers by the freezing technique. However, the major problems consist of ensuring mechanical reliability and acceptable optical losses in metal coated fibers at high temperatures. We present an experimental study of the temperature effects at 20 – 1050 °C on the performance of optical fibers with copper coating. Specific fiber degradation mechanism have been revealed

Two-layer chalcogenide-glass optical fibers with optical losses below 30 dB/km

1993 ◽  
Vol 23 (2) ◽  
pp. 89-90 ◽  
Author(s):  
A V Vasil'ev ◽  
G G Devyatykh ◽  
Evgenii M Dianov ◽  
A N Gur'yanov ◽  
A Yu Laptev ◽  
...  
Keyword(s):  
Chalcogenide Glass ◽  
Optical Fibers ◽  
Optical Losses

7- and 19-Element-Core Bend-Resistant Microstructured Fibers

2008 ◽  
Vol 39-40 ◽  
pp. 261-264 ◽  
Author(s):  
K.V. Dukel`skii ◽  
A.V. Komarov ◽  
A.V. Khokhlov ◽  
E.V. Ter-Nersesyantz ◽  
V.S. Shevandin
Keyword(s):  
Optical Fibers ◽  
Short Wavelength ◽  
Main Role ◽  
Large Core ◽  
Optical Losses ◽  
Microstructured Fibers ◽  
Fiber Core ◽  
Central Elements

The conception of main role of the lattice pitch value in bend-induced short-wavelength optical losses is presented. There is shown that creation of the fiber core by substitution with seven or nineteen central elements leads to the essential expansion of spectral working range in microstructured large core optical fibers.

scholarly journals Dependence of optical attenuation on radiation wavelength and waveguide geometry in copper-coated optical fibers

2020 ◽  
Vol 238 ◽  
pp. 11013
Author(s):  
Pavel Cherpak ◽  
Renat Shaidullin ◽  
Oleg Ryabushkin
Keyword(s):  
Optical Fibers ◽  
Near Infrared ◽  
Optical Loss ◽  
Single Mode ◽  
Optical Losses ◽  
Radiation Losses ◽  
Optical Attenuation ◽  
Novel Approach ◽  
Laser Sources

We demonstrate a novel approach to the determination of optical loss coefficients in metal-coated fibers in a 0.4-1.9 μm wavelength range. It is based on measuring the change of temperature-dependent electrical resistance of the metal coating caused by laser radiation transmitted through the fiber. A number of single-mode and multimode metallized fibers were investigated using several laser sources operating in visible and near infrared ranges. The spectral dependencies of optical losses of copper-coated fibers were experimentally obtained. The region that corresponds to the minimum optical losses is located near 1 μm wavelength. The increase of radiation losses in 1.5-1.9 μm region is much steeper compared to polymer-coated fibers.

scholarly journals Исследование оптических свойств многомодового кварцевого оптического волокна с отражающей оболочкой из фторированного термопластичного полимера

2019 ◽  
Vol 127 (9) ◽  
pp. 477
Author(s):  
А.А. Маковецкий ◽  
А.А. Замятин ◽  
Д.В. Ряховский
Keyword(s):  
Optical Properties ◽  
Optical Fiber ◽  
Optical Fibers ◽  
Scattered Radiation ◽  
Fiber Length ◽  
Numerical Aperture ◽  
Optical Losses ◽  
Laser Medicine ◽  
Propagation Of Light ◽  
Absorption Of Light

Optical properties silica - polymeric optical fiber with a core with a diameter of 430 microns and the reflecting cover 70 microns thick from thermoplastic copolymer of a tetraftoretilen with ethylene (Tefzel brand) are experimentally investigated. The polymeric cover is applied on silica fiber with applicator from polimer melt directly on drowing tower. Optical losses of the fiber, a numerical aperture and its dependence on fiber length are measured. It is established that at propagation of light in fiber its noticeable scattering is observed. It is connected with crystallinity of polymeric cover. Distribution of intensity of scattered radiation along an axis of fiber and an indicatrix of dispersion of radiation by a coating are measured. Relative deposits of dispersion and absorption of light in a cover at the general optical losses of fiber are estimated. The possibility of use of optical fibers of this structure in laser medicine is considered.

Theoretical Investigation of Metal Coating Deposition on Optical Fibers by Freezing Technique. The Model of the Process

1998 ◽  
Vol 531 ◽  
Author(s):  
A. S. Biriukov ◽  
V. A. Bogatyrjov ◽  
V. F. Lebedev ◽  
A. G. Khitun
Keyword(s):  
Thermal Stability ◽  
Melting Point ◽  
Optical Fibers ◽  
Liquid Metals ◽  
Fiber Surface ◽  
Metal Coating ◽  
Drawing Process ◽  
Coating Application ◽  
Metal Melting Point ◽  
Metal Melting

Metal-coated fibers are irreplaceable in a multiplicity of uses owing to high hermeticity of the coating and its chemical and thermal stability. At present, the most widespread technique for the metal coating application onto a fiber is a so-called freezing technique, which consists in pulling a silica fiber through a layer of a metal's melt directly in the fiber drawing process. If the fiber temperature is lower than the metal melting point, a certain amount of the melt is frozen on the fiber surface in the form of coating. For this to occur, it is necessary that the duration of the fiber-melt contact did not exceed the time during which the fiber heats up to the metal's melting point; otherwise, the frozen metal will melt again. Because silica glass is poorly wetted with a majority of liquid metals, the coating in the latter case is likely to become discontinuous.

Optical Losses in As-Prepared and Gamma-Irradiated Microstructured Silica-Core Optical Fibers

2004 ◽  
Vol 40 (11) ◽  
pp. 1229-1232 ◽  
Author(s):  
A. F. Kosolapov ◽  
I. V. Nikolin ◽  
A. L. Tomashuk ◽  
S. L. Semjonov ◽  
M. O. Zabezhailov
Keyword(s):  
Optical Fibers ◽  
Optical Losses ◽  
Silica Core ◽  
Gamma Irradiated
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