Femtosecond laser inscriptions in Kerr nonlinear transparent media: dynamics in the presence of K-photon absorptions, radiative recombinations and electron diffusions

Femtosecond lasers interacting with Kerr nonlinear optical materials, propagate in form of filaments due to the balance beam diffraction by self-focusing induced nonlinearity. laser filamentation is a universal phenomenon that belongs general class processes proper ultrashort processing systems, associated competition between nonlinearity and dispersion also known promote solitons. The present work considers model describing femtosecond inscriptions transparent medium Upon inscription, stores energy material which induces an electron plasma. consists cubic complex Ginzburg-Landau equation, additional K-order term takes into account K-photon absorption processes. equation coupled time first-order ordinary differential accounting for evolution plasma density. main objective study examine effects multi-photon absorptions, radiative recombination diffusion processes, on temporal profiles amplitude as well From numerical simulations, it found when photon number (i.e. K) contributing multiphoton ionization large enough, taking favours periodic structures both pulse repetition rate soliton train increased increase coefficient, while density multi-periodic anharmonic wave patterns.