Tapered single-mode fibres and devices. Part 2: Experimental and theoretical quantification

A quantitative evaluation of the local-mode power evolution along nonadiabatic tapered fibres and the resulting spectral responses are considered. Experimental results are interpreted and analysed for three matched-cladding fibre biconical taper structures, namely a bitaper close to the delineation curves, a bitaper far above and a double bitaper which highlights the effect of multiple cladding-mode coupling.