Near visible pump high efficiency supercontinuum generation spanning from high-order-mode within Ta2O5 waveguides

Broadband optical sources emitting low pulse energy have attracted significant attention owing to their remarkable potential for quantum technology. One of the obstacles to achieving this objective is the weak anomalous dispersion. In this study, supercontinuum generation (SCG) from 645.3 nm to 851 nm pumped by a Ti:sapphire femtosecond laser at a center wavelength of 800 nm is demonstrated by using a high-order mode (transverse electric TE20) and engineering the dispersion within the high nonlinear refractive index material, the tantalum pentoxide (Ta2O5) waveguide. The total on-chip average pulse energy of around few pJ used to excite SCG shows clear future for applications.

Automated summary

In this study, supercontinuum generation from 645.3 nm to 851 nm was demonstrated by using a high-order mode and engineering the dispersion within the high nonlinear refractive index material Ta2O5 waveguide. The results show clear potential for applications.