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  4. Cladding waveguide gratings in standard single-mode fiber for 3D shape sensing
 
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2015
Journal Article
Title

Cladding waveguide gratings in standard single-mode fiber for 3D shape sensing

Abstract
Femtosecond laser pulses were used for the direct point-by-point inscription of waveguides into the cladding of standard single-mode fibers. Homogeneous S-shaped waveguides have been processed as a bundle of overlapping lines without damaging the surrounding material. Within these structures, FBGs have been successfully inscribed and characterized. A sensor device to measure the bending direction of a fiber was created by two perpendicular inscribed cladding waveguides with FBG. Finally, a complete 3D shape sensor consisting of several bending sensor planes, capable of detecting bending radii even below 2.5 cm is demonstrated.
Author(s)
Waltermann, C.
Doering, A.
Köhring, M.
Angelmahr, M.
Schade, W.
Journal
Optics Letters  
DOI
10.1364/OL.40.003109
Language
English
Fraunhofer-Institut für Nachrichtentechnik, Heinrich-Hertz-Institut HHI  
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