Controlled spectral enhancement in supercontinuum generation by quasi-phase matching Si₃N₄ waveguide

Supercontinuum generation (SCG) is the main way to build broadband light sources. Quasi-phase-matching (QPM) offers SCG more flexibility, but faces power and fabrication challenges. This study uses a Si <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> N <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</inf> waveguide to achieve efficient QPM-SCG with lower power demands and tailored spectral bandwidth, advancing power-efficient customizable broadband sources.