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Report No.
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High-spatiotemporal-quality high-intensity laser system

Kiriyama, Hiromitsu; Mori, Michiaki; Shimomura, Takuya; Nakai, Yoshiki*; Tanoue, Manabu*; Sasao, Hajime*; Kondo, Shuji; Kanazawa, Shuhei; Ochi, Yoshihiro; Tanaka, Momoko; Suzuki, Masayuki*; Daito, Izuru; Okada, Hajime; Kotaki, Hideyuki; Kosuge, Atsushi  ; Nishiuchi, Mamiko; Pirozhkov, A. S.; Ogura, Koichi; Hayashi, Yukio; Yogo, Akifumi; Fukuda, Yuji; Kando, Masaki; Nagashima, Keisuke; Kondo, Kiminori; Sugiyama, Akira; Yokoyama, Atsushi; Bulanov, S. V.; Daido, Hiroyuki; Bolton, P.; Kawanishi, Shunichi*; Kimura, Toyoaki*; Tajima, Toshiki; Sato, Masatoshi*; Tamaoki, Yoshinori*; Yoshii, Takehiro*; Maeda, Junya*; Matsuoka, Shinichi*; Kan, Hirofumi*

We report on a femtosecond high-intensity OPCPA/Ti:sapphire hybrid laser system that produces more than 30 J broadband output energy, indicating the potential for achieving petawatt-class peak powers. High temporal-contrast of 10$$^{-10}$$ to 10$$^{-11}$$ has been obtained with a near-perfect flat-topped spatial-profile of filling factor $$sim$$80%. We also present a compact, high-intensity OPCPA/Yb:YAG hybrid laser system that generates $$sim$$100 mJ output energy with a temporal contrast of better than 10$$^{-8}$$ and good spatial beam quality.

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