Abstract

A slab laser system consisting of three Nd:YAG slabs with dimensions 7 mm × 26 mm × 191 mm was operated with different resonators in an oscillator–amplifier–amplifier arrangement. In single-shot operation the system provided a maximum output energy of 148 J with a pulse duration of 4 ms and an overall efficiency of 4.3%. A stable resonator provided a maximum steady output power of 2260 W, and we measured beam parameter products of 8 mm mrad in the x direction and 100 mm mrad in the y direction. An output power of 1460 W and beam parameter products of less than 4 mm mrad in both directions were obtained with an unstable resonator with a graded-reflectivity mirror.

© 1993 Optical Society of America

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