Dynamic Control of Cascaded Four-Wave Mixing via Re-configurable Dispersion

We integrate a spatial light modulator-based dispersion controller into a cascaded four-wave mixing (CFWM) system. By tuning the group delay dispersion (GDD) and fourth-order dispersion (FOD) terms, we control the CFWM phase-matching and demonstrate output bandwidth tuning of over 3.3x. At the maximum bandwidth, our system covers the telecommunications S, C, and L bands (1466–1641 nm) with an average output power of 300 mW, which is contained in 52 individual lines spaced 374 GHz apart. This method represents a reconfigurable alternative to photonic crystal fibers for dispersion-engineering, and allows for the use of step index fiber and customizable power-spectral density profiles.