Filament-induced supercontinuum generation in the non-centrosymmetric nonlinear crystal

We report on the experimental investigation of filament-induced supercontinuum (SC) generation in a non-centrosymmetric KTA nonlinear crystal driven by hundreds of femtosecond laser pulses at 1030 nm. Driven by the s-polarized laser, a visible SC spanning from 400 nm to 900 nm is achieved when the peak power of the driving laser exceeds 5 times the critical power. Polarization analysis reveals distinct spectral and spatial profiles for the generated s- and p-polarized supercontinuum components. This work demonstrates the feasibility of controlling filament-induced nonlinear processes in nonlinear crystals, supporting their potential use in cascaded nonlinear optical applications.