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Updated: Aug 6, 2026
08:48
Writing Bragg Gratings in Multicore Fibers
Published on: April 20, 2016
Modal coupling in fiber tapers decorated with metallic surface gratings
W Ding1, S R Andrews, T A Birks
1Department of Physics, University of Bath, Claverton Down, Bath, UK. pypwd@bath.ac.uk
Optics Letters
|August 12, 2006
Abstract:
An interference-based scheme for fabricating periodic metal gratings on one side of the uniform waist of optical fiber tapers has been developed. Optical characterization of a 5 mm long, 511 nm period gold grating fiber taper with a 10 microm diameter reveals backward coupling to both guided and radiation modes that is explained by using an analytical mode-coupling analysis. A refractometer based on this grating taper has a high and constant sensitivity over a large refractive index operating range of 1 to 1.41.
