Enhanced supercontinuum generation and dispersive wave emission in a silicon nitride waveguide pumped at 1550 nm telecom wavelength

Abstract

We have numerically demonstrated that supercontinuum (SC) generation and dispersive wave (DW) emission in a silicon nitride waveguide can be actively controlled harnessing the weak continuous wave (CW) trigger scenario. The detailed simulation results suggest that the SC bandwidth, the temporal coherence, and the conversion of DWs are significantly enhanced after applying the CW trigger at the selected frequencies. These results are analyzed through the pump depletion occurring in the nonlinear propagation process. By tuning the CW trigger power, the CW power requirement for this approach is proved to be as low as 1 0 − 5 of the pump peak power. These numerical investigations provide valuable insight into obtaining the on-chip enhanced SC and DWs with an active control method.