The coefficients from the polynomial fit to the dispersion profile do not have enough digits to reproduce the curve. A scaling error on Figs. 3 and 4 has been corrected.

© 2005 Optical Society of America

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Figures (1)

Fig. 1.
Fig. 1.

Left: The scaled dispersion terms β 2, β 4, β 6 and β 8 as functions of λ. The higher order dispersion terms are of considerable size and change sign several times in the shown interval. Right: A zoom on the high-frequency ZDW shows that β 4 and β 8 are negative below the ZDW. They can therefore compensate for the positive β 2 and β 6 which means that phasematching is possible in the normal dispersion regime.