360-W average power operation with a single-stage diode-pumped Nd:YAG amplifier at a 1-kHz repetition rate |
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Authors: | Kiriyama Hiromitsu Yamakawa Koichi Nagai Toru Kageyama Nobuto Miyajima Hirofumi Kan Hirofumi Yoshida Hidetsugu Nakatsuka Masahiro |
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Affiliation: | Advanced Photon Research Center, Kansai Research Establishment, Japan Atomic Energy Research Institute, Umemidai 8-1, Kizu-cho, Kyoto 619-0215, Japan. kiriyama@apr.jaeri.go.jp |
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Abstract: | We report a high-average-power laser-diode-pumped Nd:YAG master oscillator power amplifier system that has a minimum number of elements in the single multipass zigzag-slab amplifier stage and is used to pump a high-peak-power and high-average-power Ti:sapphire laser system. This phase-conjugated system produces an average power of 362 W at 1 kHz in a 30-ns pulse with an optical-to-optical conversion efficiency of 14%. With an external KTP doubler this system generates 132 W of green average output power at 1 kHz with a conversion efficiency of 60% when pumped at a power level of 222 W. To the best of our knowledge these results represent the highest average output power at both infrared and green wavelengths achieved in a single amplifier stage. |
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