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;4. Plots of a absorption, b dispersion and c group index of probe response versus detuning #cod#x2206; p for 17.38% solid line and 29.06% dashed line of Er 3+ ion concentration. The selected parameters are #cod#x03A9; p #cod#x003D; 0.1, #cod#x03A9; c #cod#x003D; 3, #cod#x2206; c #cod#x003D; 0.0, and r #cod#x003D; 1.