XU Kang, Abulimiti·Wumaier, ZHANG Min-hua, REN Li-qing, LI Yong-fang*
(School of Physics and Information Technology, Shaanxi Normal University, Xi′an 710062, Shaanxi, China)
Abstract:
The interaction between a chirped laser pulse and a two-level atomic system is studied under the first order perturbation theory and the propagation process of driven field in two-level medium is analyzed. At first, the density matrix equation of interaction between optic field and two-level system is presented and its approximate solution is obtained by using first order perturbation approximation. Then, the signal amplitude equation is derived from the propagation wave equation, the analytic expession of propagation equation is obtained by using first order aprroximation on the signal amplitude equation. It is shown that the interference between the input field and the signal field occurs.
KeyWords:
propagation equation; interference; chirped pulse
