Role of incoherent pumping and Er~(3+) ion concentration on subluminal and superluminal light propag

• 作 者: Seyyed Hossein Asadpour H.Rahimpour Soleimani
• 机 构: Department of Physics, University of Guilan,Rasht, Iran,
• 出 处: Chinese Physics B
• 发表日期: 2015年01期
• 关键词: pumping lasing inversion coherent coherence dipole relaxation transparency susce

We study the absorption-dispersion process and group index of weak probe field in a four-level Er3+:YAG crystal.We find that the Er3+ion concentration and incoherent pumping field can influence the absorption-dispersion process and group index of weak probe field.Moreover,our results show that Er3+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 Er3 +: YAG crystal. We find that the Er3 + ion concentration and incoherent pumping field can influence the absorption-dispersion process and group index of weak probe field . Moreover, our results show that Er3 + ion concentration plays a major role in lasing without inversion and absorption with inversion.