Gratings in novel fibre geometry for applications in shape sensing


A long period grating (LPG) fabricated in progressive three-layered (PTL) fibre is described. The grating with a period of 391µm, had dual attenuation bands associated with a particular cladding mode. The dual attenuation bands have been experimentally characterised for their spectral sensitivity to bending, which resulted in the highest sensitivity to bending seen for this particular fibre and temperature. The spectral characteristics of the fibre have been modelled giving good agreement to the experimental data as well as showing that the attenuation bands are both associated with the second order HE/EH2,n cladding mode.

Additional Information: Helen Dobb ; Thomas Allsop ; David J. Webb and Kyriacos Kalli "Gratings in novel fibre geometry for applications in shape sensing", Proc. SPIE 5459, Optical Sensing, 109 (September 1, 2004); Copyright 2004 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Event Title: Optical Sensing
Event Type: Other
Event Location: Strasbourg
Event Dates: 2004-04-26 - 2004-04-27
Published Date: 2004-09-01
Authors: Dobb, Helen L.
Allsop, Thomas
Webb, David J.
Kalli, Kyriacos


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