Ultrabroadband Nonlinear Optics in Dispersion Engineered Periodically Poled Lithium Niobate Waveguides

We experimentally demonstrate the first generation of dispersion-engineered periodically poled lithium niobate (PPLN) waveguides. These waveguides achieve ultra-broadband second-harmonic generation (SHG) and multi-octave supercontinuum generation (SCG) with record-low pulse energies.