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

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

Asadpour Seyyed Hossein†, Soleimani H. Rahimpour

Fig.#cod#x00A0;5. Plots of a absorption, b dispersion and c population inversion versus Rabi frequency #cod#x03A9; c for different values of Er 3+ ion concentration in the presence of incoherent pumping field. The selected parameters are the same as those in Fig.#cod#x00A0; 2 .