  Two-photon interference and Hong-Ou-Mandel (HOM) effect are relevant tools
for quantum metrology and quantum information processing. In optical coherence
tomography, HOM effect is exploited to achieve high-resolution measurements
with the width of the HOM dip being the main parameter. On the other hand,
applications like dense coding require high-visibility performances. Here we
address high-order dispersion effects in two-photon interference and study,
theoretically and experimentally, the dependence of the visibility and the
width of the HOM dip on both the pump spectrum and the downconverted photon
spectrum. In particular, a spatial light modulator is exploited to
experimentally introduce and manipulate a custom phase function to simulate the
high-order dispersion effects.
