Bragg gratings in surface-core fibers: Refractive index and directional curvature sensing
Osório, J. H.
;
Oliveira, R.
; Aristilde, S.
; Chesini, G.
; Franco, M. A. R.
;
Nogueira, R.N.
; Cordeiro, C. M. B.
Optical Fiber Technology Vol. 34, Nº 1, pp. 86 - 90, March, 2017.
ISSN (print): 1095-9912
ISSN (online): 1068-5200
Journal Impact Factor: 1,300 (in 2014)
Digital Object Identifier: 10.1016/j.yofte.2017.01.007
Abstract
In this paper, we report, to our knowledge, the first extended study of the inscription of Bragg gratings in surface-core fibers and their application in refractive index and directional curvature sensing. The research ranges from fiber fabrication and grating inscription in untapered and tapered fibers to the per- formance of simulations and sensing measurements. Maximum sensitivities of 40 nm/RIU and 202.7 pm/ m?1 were attained in refractive index and curvature measurements respectively. The obtained results compares well to other fiber Bragg grating based devices. Ease of fabrication, robustness and versatility makes surface-core fibers an interesting platform when exploring fiber sensing devices
