Generation of high-contrast, petawatt-class laser pulses with a OPCPA/Ti:sapphire hybrid laser system using a double CPA and a double saturable absorber

Kiriyama, Hiromitsu; Shimomura, Takuya; Sasao, Hajime; Nakai, Yoshiki*; Tanoue, Manabu; Kondo, Shuji; Kanazawa, Shuhei; Pirozhkov, A. S.; Mori, Michiaki; Fukuda, Yuji; Nishiuchi, Mamiko; Kando, Masaki; Bulanov, S. V.; Nagashima, Keisuke; Yamagiwa, Mitsuru; Kondo, Kiminori; Sugiyama, Akira; Bolton, P.; Tajima, Toshiki*; Miyanaga, Noriaki*

We demonstrate the temporal contrast enhancement in a petawatt-class Ti:sapphire chirped-pulse amplification (CPA) laser system. An extra saturable absorber, introduced downstream a low gain optical parametric chirped-pulse amplification (OPCPA) preamplifier, has improved the temporal contrast in the system to 1.4 10 $^{12}$ on the sub-nanosecond time scale at 70 TW power level. We have achieved 28 J of uncompressed broadband output energy with this system, indicating the potential for reaching peak powers near 600 TW.

Language	:	English
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Meeting title	:	International Committee on Ultra-High Intensity Lasers 2012 (ICUIL 2012)
Held date	:	2012/09
Location (city)	:	Mamaia
Location (country)	:	Romania
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Cooperating Institute	:	文部科学省

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Registration No. : BB20121293
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