Abstract

We describe 20-kW operation of a Q-switched Nd:YLF laser end pumped by a 5-mJ, 25-W quasi-cw diode-laser bar. A fiber coupler was used to adapt the 1-cm-wide active area of the diode-laser bar to the circular shape of the TEM00 mode. The maximum 1047-nm TEM00 output energy was 0.5 mJ in a 22-nsec Q-switched pulse. This corresponds to a peak power in excess of 20 kW and was obtained at an optical slope efficiency of 13%.

© 1990 Optical Society of America

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