A high repetition frequency, laser-diode-pumped Nd:YAG green laser system is constructed and its characteristics are studied. The system consists of an oscillator and an amplifier operated at the pulse repetition frequency (PRF) of 1 kHz, and the Nd:YAG slabs with zigzag pass configuration are installed in the laser heads. Maximum average power of fundamental wavelength is 30 W for single-pass, 43 W for double-pass configuration. The fundamental laser radiation is converted to the second harmonic with the maximum conversion efficiency of 57 %. The average power of the second harmonic obtained is 15.5 W for single-pass and 19 W for double-pass. The fourth harmonic obtained is 2.3 W for the input power of 13 W of 532 nm.

© 1996 Optical Society of America

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