doi: 10.17586/2226-1494-2018-18-5-901-904


D. A. Egorova, A. V. Kulikov

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Egorova D.A., Kulikov A.V. Results of experimental research and simulation of multi-core fiber waveguide with fiber Bragg gratings array. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2018, vol. 18, no. 5, pp. 901–904 (in Russian). doi: 10.17586/2226-1494-2018-18-5-901-904

Subject of Research. The development and creation of a measurement system for determination and monitoring of the location and bends of extended objects in space are actual at the moment.We propose the creation of a sensitive part of fiber-optic measurement system based on chirped fiber Bragg gratings (FBGs) inscribed in a multi-core fiber. Method. The method essencelies independence determination of the grating period change in each core on the bending radius of the fiber, that gives the possibility to reconstruct remotely the trajectory of  the optical fiber laying in space.Main Results. The paper presents experiment results with a single-mode fiber with an array of chirped FBGs. The experimental optical scheme and the reflection spectra before and after the single-core optical fiber bending are shown. The geometry and computer model of multi-core fiber section with a given radius bend are described. Practical Relevance. Unlike the other existing fiber-optic measurement systems, a system with multi-core optical fiber with chirped FBGs array makes it possible to determine the trajectory of fiber-optic light guide laying in space without using methods of optical frequency domain reflectometry, which determine the location of the Bragg gratings along the optical fiber length.

Keywords: fiber-optic light guide, chirped fiber Bragg gratings array, multi-core optical fiber, fiber-optic measurement system

Acknowledgements. This work has been performed at ITMO University and supported by the Ministry of Education and Science of the Russian Federation (the project No. 03.G25.31.0245).

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