Integrated photonics based on Si3N4 waveguides (TriPleX platform) are of high interest because of compatibility with microfluidic (lab-on-a-chip) applications and because these waveguides have a low propagation loss and a wide transparency range that includes the visible part of the spectrum. Within this research program we investigate nonlinear frequency conversion based on nonlinear optical four-wave mixing to create on-chip broadband or tuneable light sources. For an efficient nonlinear optical process, we use either quasi-phase matching or engineer the dispersion of the waveguides to have a phase-matched nonlinear optical process. The waveguides are manufactured by our partner LioniX. We have been able to generate a super continuum with a record bandwidth of almost 500 THz (for generation on a chip).