Pulse-periodic Y₃Al₅O₁₂:Er³⁺laser with high activator concentration

Abstract

The development of a pulsed Y3Al5O12:Er3+ laser (4I11/2–4I13/2 transition, λ = 2.94 μ) with activator concentrations of 30 wt.% (T = 300 °K) is reported. A pulse repetition frequency of f = 20 Hz was obtained under free-oscillation and Q-switched conditions. Stimulated emission due to this transition at T = 300 °K was obtained over the whole concentration series of the Y3Al5O12–Er3Al5O12 system with Er3+ concentrations of between 10 and 100 wt.%.