Lasers

Solid-state laser with a high average output power and compensation of the optical inhomogeneities of the active medium

V. S. Gulev^a, S. L. Mikerin^a, A. A. Pavlyuk^b, A. M. Yurkin<sup>c

a</sup> Institute of Automation and Electrometry, Siberian Branch of Russian Academy of Sciences, Novosibirsk
^b Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk
^c Institute of Mineralogy and Petrology, Siberian Branch RAS

Abstract: The energy characteristics and the spatial distributions of the radiation generated in the free-running lasing regime were investigated for a configuration (proposed previously by the authors) with compensation of the optical inhomogeneities in the active media of powerful solid-state lasers. Slab active elements made of Nd³⁺:KGd(WO₄)₂ and Nd³⁺:NaLa(MoO₄)₂ crystals were used. A uniform transverse intensity distribution in an output beam (37 mm × 8 mm in cross section) and a nearly limiting angular divergence were achieved for a pulse energy in excess of 60 J, a repetition rate up to 2 Hz, and a slope efficiency of 2.5%.

PACS: 42.55.Rz, 42.60.Lh

Received: 21.05.1999

 English version: Quantum Electronics, 1999, 29:10, 857–858

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