Supercontinuum generation with octave-spanning bandwidth in the high order mode based Ta2O5 waveguide*

Super-continuum generation(SCG) has been attracting plenty of attention due to its wide application, such as OCT and communication. In this work, anomalous dispersion Ta2O5 based waveguide was designed and fabricated for the super-continuum generation(SCG) due to its nature of two-photon absorption free and high optical nonlinearity. The 5mm length air cladding Ta2O5 waveguide with a dimension of 800nm x 700nm was designed and fabricated for fulfilling anomalous dispersion requirement which is crucial for SCG. For excitation laser wavelength of 1056nm, with excitation peal power of around 400W, the 1.5 octave-spanning was demonstrated. Compared to a SiN-based nonlinear waveguide, the resulting exhibit Ta2O5 based waveguide a promising material for SCG.