Implementation of vectorial bend sensors using long-period gratings UV-inscribed in special shape fibres
Zhao, Donghui; Zhou, Kaiming; Chen, Xianfeng F.; Zhang, Lin; Bennion, Ian; Flockhart, Gordon M.H.; MacPherson, William N.; Barton, James S. and Jones, Julian D.C.
Implementation of vectorial bend sensors using long-period gratings UV-inscribed in special shape fibres.
Measurement science and technology, 15
We report the implementation of vector bending sensors using long-period gratings (LPGs) UV-inscribed in flat-clad, four-core and D-shaped fibres. Our experiments reveal a strong fibre-orientation dependence of the spectral response when such LPGs are subjected to dynamic bending, which provided an opportunity to realize curvature measurement with direction recognition.