Lasing without population inversion in an Er³⁺-doped YAG crystal

M. Sahrai Research Institute for Applied Physics, University of Tabriz, Tabriz, IranCorrespondence[email protected]

S.H. Asadpour Islamic Azad University, Bandar-e Anzali Branch, Young Researchers Club, Bandar-e Anzali, Iran

A. Eslami-Majd Research Institute for Applied Physics, University of Tabriz, Tabriz, Iran

R. Sadighi-Bonabi Department of Physics, Sharif University of Technology, Tehran, Iran

Abstract

Two atomic models are proposed for an Er³⁺-doped YAG crystal with application to lasing with and without population inversion. It is shown how an incoherent pumping field and coherent control coupling field can produce a laser in the presence and absence of population inversion.

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Lasing without population inversion in an Er³⁺-doped YAG crystal

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Lasing without population inversion in an Er3+-doped YAG crystal

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Lasing without population inversion in an Er³⁺-doped YAG crystal