Abstract

Applying Cr4+:YAG saturable absorbers, we demonstrate efficient passively Q-switched operation of diode-pumped Nd:YAG lasers with a maximum average output power of more than 800 mW. Pulse durations below 3 ns, energies of 70 µJ, and peak powers of 30 kW are observed with kilohertz repetition rates. Single-frequency operation is accomplished for all output powers by a nonplanar ring geometry.

© 1997 Optical Society of America

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