Characteristics of In-Fibre Bragg Gratings Centre Wavelength This is the wavelength at the centre of the gratings reflection band Bandwidth This is the width of the reflection band and specifies the range of wavelengths reflected Reflectance Peak This is a measure of the proportion of incident light reflected at the centre wavelengthCharacteristics of In-Fibre Bragg Gratings • Centre Wavelength – This is the wavelength at the centre of the grating's reflection band. • Bandwidth – This is the width of the reflection band and specifies the range of wavelengths reflected. • Reflectance Peak – This is a measure of the proportion of incident light reflected at the centre wavelength