Measurement of optical losses of metal-coated optical fibers at different wavelengths

Pavel Cherpak; Ivanov Grigorii; Nikolay Vanyushkin; Renat Shaidullin; Oleg Ryabushkin

doi:10.1117/12.2541150

28 August 2019 Measurement of optical losses of metal-coated optical fibers at different wavelengths

Pavel Cherpak, Ivanov Grigorii, Nikolay Vanyushkin, Renat Shaidullin, Oleg Ryabushkin

Proceedings Volume 11199, Seventh European Workshop on Optical Fibre Sensors; 1119937 (2019) https://doi.org/10.1117/12.2541150
Event: Seventh European Workshop on Optical Fibre Sensors, 2019, Limassol, Cyprus

Abstract

A novel method for high-sensitive measurements of optical attenuation in metal-coated optical fibers in a wide range of wavelengths is demonstrated. Some part of the radiation transmitted through the waveguiding core of the metallized silica fiber is scattered and eventually absorbed in the carbon layer or the metal coating, thus heating it. Absorption in the silica core also contributes to the overall fiber heating. The method used for determination of optical attenuation coefficients of metallized fibers is based on the measurement of the change of temperature-dependent electrical resistance of metal coating induced by transmitted laser radiation. A number of single-mode and multimode metallized fibers with different geometry were investigated using several laser sources operating in visible and near infrared ranges. Experimentally obtained spectral dependence of optical losses of copper-coated fibers was analyzed. Possible explanations for optical attenuation mechanisms at different wavelengths and in different fibers were proposed. The obtained results can help to optimize various devices based on metal-coated fibers, such as laser radiation power fiber sensors or high-power laser sources.

Citation Download Citation

Pavel Cherpak, Ivanov Grigorii, Nikolay Vanyushkin, Renat Shaidullin, and Oleg Ryabushkin "Measurement of optical losses of metal-coated optical fibers at different wavelengths", Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 1119937 (28 August 2019); https://doi.org/10.1117/12.2541150

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KEYWORDS

Optical fibers

Signal attenuation

Coating

Copper

Metals

Fiber lasers

Silica

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