1. Curvature sensing with a D-shaped multicore fibre and Brillouin optical time-domain reflectometry
- Author
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Gilberto Brambilla, Angeliki Zafeiropoulou, Laurence Cooper, Ali Masoudi, and Apostolos Zdagkas
- Subjects
Materials science ,business.industry ,Ranging ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Curvature ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,010309 optics ,Brillouin zone ,Core (optical fiber) ,Optics ,Brillouin scattering ,Wavelength-division multiplexing ,0103 physical sciences ,Time domain ,0210 nano-technology ,Reflectometry ,business - Abstract
A distributed curvature sensor based on Brillouin optical time-domain reflectometry interrogation technique in a D-shaped 7-core fibre is presented. By comparing the relative Brillouin frequency shift between the central core and three of the outer cores of the 7-core fibre, the curvature of various spools with different diameters is measured with a deviation from the actual value ranging between 9% and 15%. The analysis and results presented in this study show the first demonstration of distributed bend sensing using a specially designed multicore D-shaped fibre, paving the way for fully distributed 3D shape sensing.
- Published
- 2020