Influence of relative phase on propagation effect in open V-type three-level system  

作　　者：梁颖 贾克宁 刘中波 樊锡君 

机构地区：[1]College of Physics and Electronics,Shandong Normal University

出　　处：《Optoelectronics Letters》2012年第1期72-75,共4页光电子快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.10875072)

摘　　要：In this paper we study the influence of the relative phase between .the probe and driving fields on propagation effect in an open Doppler broadening V-type three-level atomic system with spontaneously generated coherence （SGC） by using the calculation resuk of the density matrix motion equations and the propagation equations of the driving and probe fields. It is shown that the relative phase （Ф） has remarkable periodical influence on the propagation effect, and the period is 2π. By selecting appropriate value of Ф, we can get larger lasing without inversion （LW1） gain and longer propagation distance in which gain exists, and hence obtain higher probe field （i.e. LWI） intensity. When Ф=π/2, the largest LWI gain and probe field intensity can be got. In addition, the atomic exit rate （γ0） and ratio （S） of the atomic injection rates also have a considerable modulation role on the phase-dependent propagation effect. In certain value range of Y0 （S）, LWI gain and probe field intensity increase with γ0 （S） increasing. In the open system, LWI gain and probe field intensity much larger than those in the corresponding closed system can be obtained.

关 键 词：ATOMS Equations of motion VANADIUM 

分 类 号：O562[理学—原子与分子物理] O431.2[理学—物理]