E. V. Zharikov, V. I. Zhekov, L. A. Kulevskii, T. M. Murina, V. V. Osiko, A. M. Prokhorov, A. D. Savel'ev, V. V. Smirnov, B. P. Starikov, M. I. Timoshechkin, “Stimulated emission from Er<sup>3+</sup> ions in yttrium aluminum garnet crystals at λ = 2.94 μ”, Kvantovaya Elektronika, 1974, Volume 1, Number 8,Pages <nobr>1867

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Stimulated emission from Er³⁺ ions in yttrium aluminum garnet crystals at λ = 2.94 μ

E. V. Zharikov, V. I. Zhekov, L. A. Kulevskii, T. M. Murina, V. V. Osiko, A. M. Prokhorov, A. D. Savel'ev, V. V. Smirnov, B. P. Starikov, M. I. Timoshechkin

Abstract: Stimulated emission due to the ⁴I_11/2–⁴I_13/2 transition (λ = 2.936 μ) in yttrium aluminum garnet (Y₃Al₅O₁₂) doped with Er³⁺ ions (30 wt%) was observed for the first time at 300°K. The output energy from crystals of 50×3 mm dimensions was 0.3 J under free-oscillation conditions and 0.05 J in the case of Q switching. The lifetime of the ⁴I_11/2 level was determined for crystals with 3–30 wt% Er³⁺. The energy from the higher Er³⁺ levels relaxed in a cascade manner through ⁴I_11/2 to ⁴I_13/2.

UDC: 621.375.8

PACS: 42.70.Hj, 42.55.Rz, 42.60.Jf, 42.60.Gd, 42.60.Rn

Received: 25.03.1974