Broad-spectrum frequency comb generation from two continuous waves

In this aim, we have experimentally implemented two methods, based on either the non-linear compression of a sinusoidal beating [Fatome et al, 2006] or the modulation instability [Mamyshev et al, 1990]. In both cases, we will generate in a single anomalous dispersive highly-nonlinear fiber, a frequency comb with a dominating wavelength (i.e. a wavelength with a higher spectral intensity) shifted toward higher wavelengths. The frequency spacing between the harmonics can be tuned by simply changing the frequency separation between the two initial continuous waves.