Role of incoherent pumping and Er<sup>3+</sup> ion concentration on subluminal and superluminal light propagation in Er<sup>3+</sup>-doped YAG crystal期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Role of incoherent pumping and Er³⁺ ion concentration on subluminal and superluminal light propagation in Er³⁺-doped YAG crystal

Authors:	Seyyed Hossein Asadpour H Rahimpour Soleimani

Institution:	Department of Physics, University of Guilan, Rasht, Iran

Abstract:	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.

Keywords:	Er³⁺ ion concentration incoherent pumping field superluminal
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