Pulse pair propagation under conditions of induced transparency

摘要

Abstract: The spatial and temporal dynamics of two short laser pulses propagating in absorbing three-level medium under conditions of induced transparency is investigated in adiabatic approximation. We analyze two cases of electro-magnetically induced transparency creating - coherent population trapping and adiabatic population transfer. It is shown that in both cases the probe pulse can penetrate into a medium at a distance considerably exceeding the length of linear absorption of a single weak probe pulse in absence of a coupling pulse at adjacent transition. The difference of spatial and temporal evolution of level population in processes of coherent population trapping and adiabatic population transfer is although demonstrated.!18