PROPERTIES OF WAVEGUIDE INDUCED BY DARK PHOTOVOLTAIC SOLITONS IN LiNbO3:Fe CRYSTAL

Abstract

We investigate waveguides induced by dark photovoltaic solitons without background beam theoretically and experimentally in LiNbO 3 crystal. Based on sole charge carrier band-transport model, we numerically simulate the transmission equation with shooting method, and find it single mode. Furthermore, we utilize two probe beams detecting the waveguide in experiments: one is continuous with wavelength of 632.8 nm; the other is femtosecond pulse of 800 nm. Comparing the two set of results, we conclude that the waveguides have basic mode only, while the femto-second pulse is more stable. Due to aforementioned stability of waveguide for femto-second pulse, it indicates the possibility of low power continuous beam controlling the high power laser pulse.