Role of incoherent pumping and Er^(3+) ion concentration on subluminal and superluminal light propagation in Er^(3+)-doped YAG crystal  

作　　者：Seyyed Hossein Asadpour H.Rahimpour Soleimani 

机构地区：[1]Department of Physics, University of Guilan,Rasht, Iran

出　　处：《Chinese Physics B》2015年第1期269-274,共6页中国物理B（英文版）

摘　　要：We study the absorption-dispersion process and group index of weak probe field in a four-level Er^3＋：YAG crystal.We find that the Er^3＋ion concentration and incoherent pumping field can influence the absorption-dispersion process and group index of weak probe field. Moreover, our results show that Er^3＋ion concentration plays a major role in lasing without inversion and absorption with inversion.We study the absorption-dispersion process and group index of weak probe field in a four-level Er^3＋：YAG crystal.We find that the Er^3＋ion concentration and incoherent pumping field can influence the absorption-dispersion process and group index of weak probe field. Moreover, our results show that Er^3＋ion concentration plays a major role in lasing without inversion and absorption with inversion.

关 键 词：Er^3＋ion concentration incoherent pumping field SUPERLUMINAL 

分 类 号：O734[理学—晶体学]