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

Voloshin, V. V.; Vorob'ev, Igor' L; Ivanov, G. A.; Исаев, В. А.; Kolosovskii, Alexander; Попов, С. М.; Chamorovskii, Yuri

doi:10.1134/s1063785009040233

Cited by 7 publications

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“…Higher temperatures can be measured with metal coated fibres, but it is well known that these fibres have high attenuation values at low temperatures [16]. A further drawback of aluminum coated fibres is additional hydroxyl absorption that can be observed at temperatures of 400 • C [17]. This work has been performed within the framework of the HiTI Project (High Temperature Instruments for geophysical reservoir characterization and exploitation) in order to test the applicability of fibre optic temperature measurements at temperatures above 300 • C within a hot geothermal well.…”

Section: Introductionmentioning

confidence: 99%

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Temperature-dependent characterization of optical fibres for distributed temperature sensing in hot geothermal wells

Reinsch

Henninges

2010

Meas. Sci. Technol.

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This study was performed in order to select a proper fibre for the application of a distributed temperature sensing system within a hot geothermal well in Iceland. Commercially available high temperature graded index fibres have been tested under in-situ temperature conditions. Experiments have been performed with four different polyimide coated fibres, a fibre with an aluminum coating and a fibre with a gold coating. To select a fibre, the relationship between attenuation, temperature, and time has been analyzed together with SEM micrographs. On the basis of these experiments, polyimide fibres have been chosen for utilisation. Further tests in ambient and inert atmosphere have been conducted with two polyimide coated fibres to set an operating temperature limit for these fibres. SEM micrographs, together with coating colour changes have been used to characterize the high temperature performance of the fibres. A novel cable design has been developed, a deployment strategy has been worked out and a suitable well for deployment has been selected.PACS numbers: 42.81. Cn, 93.85.Fg In press: Meas. Sci. Technol.

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Section: Introductionmentioning

confidence: 99%

“…Higher temperatures can be measured with metal-coated fibres, but it is well known that these fibres have high attenuation values at low temperatures [16]. A further drawback of aluminiumcoated fibres is additional hydroxyl absorption that can be observed at temperatures of 400 • C [17].…”

Section: Introductionmentioning

confidence: 99%