The reconstructions of the FBG1 for
different layer thickness (5, 20, 50 and 100 mm) are presented in Fig. 3-26.
The number of spectral points M is set to ten times the number of layers (it
will be seen in the next sub-section that a higher number of spectral points is
not necessary). Apart from the reduced resolution observed at discontinuities,
the reconstructions are not much affected from the layer thickness.
Fig. 3-26 Reconstructed coupling coefficient amplitude (top) and local Bragg
wavelength (bottom) for the FBG1 performed with M = 10N and different
layer thickness parameters : 5 mm for the solid lines,
20 mm for the dashed lines, 50 mm for the dashed-dotted
lines and 100 mm for the dotted lines; the curves are translated for clarity
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