Abstract
We demonstrate water-salinity sensing based on the relative shifts of the higher-order Bragg-resonances in a cladding-etched fibre Bragg grating sensor, and achieve sensitivities of 2.9nm/RIU(LP01) and 3.4nm/RIU(LP11) @λ=1560nm for the two sets of modes respectively.
© 2016 Optical Society of America
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