Figure 6

Spectral response and performance of different types of PCF. (a) Dispersion curves of the ANDi (red) and non-ANDi (black) PCFs, defined as the variation of group delay with respect to the wavelength per unit length. (b) Corresponding spectra (logarithmic scale) of the supercontinuum emission obtained with both types of PCF. (c) SEM image showing the general geometry of the PCF.