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;2. a Absorption, b dispersion, and c group index of probe response versus detuning #cod#x2206; p for different Er 3+ ion concentrations in the absence of incoherent pumping field. The selected parameters are #cod#x03A9; p #cod#x003D; 0.1, #cod#x03A9; c #cod#x003D; 3, and #cod#x2206; c #cod#x003D; 0.0.