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Oral presentation

Multi-millijoule picosecond regenerative chirped-pulse amplification of two wavelengths with cryogenically-cooled Yb$$^{3+}$$:LuLiF$$_{4}$$ crystal

Akahane, Yutaka; Aoyama, Makoto; Sugiyama, Akira; Kubo, Ryoichi*; Ogawa, Kanade; Tsuji, Koichi; Yamakawa, Koichi

no journal, , 

We have performed chirped-pulse regenerative amplification at 999 nm and 1024 nm wavelengths with cryogenically-cooled Yb$$^{3+}$$:LuLiF$$_{4}$$ crystal. High-energy amplified pulses with energies of 6 mJ and 8.5 mJ were obtained at 999 nm and 1024nm wavelengths, respectively. In the regen durations of output pulses were compressed to 13 ps and 27 ps, respectively by gain-narrrwoing, so these pulses are available as pump sources for nonlinear effects without additional pulse compression devices. Simultaneous two-color lasing was also performed in this study, which is available for differential frequency generation in THz region.

Oral presentation

Development of YAG laser system for edge Thomson scattering diagnostics in ITER

Hatae, Takaki; Hayashi, Toshimitsu; Kajita, Shin*; Yoshida, Hidetsugu*; Fujita, Hisanori*; Nakatsuka, Masahiro*; Yahagi, Kenichi*; Shinobu, Katsuya*; Ono, Takehiro; Kusama, Yoshinori

no journal, , 

no abstracts in English

Oral presentation

High-peak-power, high-contrast OPCPA/Ti:sapphire hybrid laser system

Kiriyama, Hiromitsu; Mori, Michiaki; Daito, Izuru; Kotaki, Hideyuki; Kanazawa, Shuhei; Kondo, Shuji; Nakai, Yoshiki; Shimomura, Takuya; Tanoue, Manabu*; Akutsu, Atsushi; et al.

no journal, , 

We report on a high-contrast, high-intensity Ti:sapphire laser system using an optical parametric chirped-pulse (OPCPA) pre-amplifier. By injecting cleaned microjoule seed pulses into the OPCPA, a temporal contrast greater than 10$$^{10}$$ within picosecond times before the main femtosecond pulse is demonstrated with an output pulse energy of 1.7 J and a pulse duration of 30 fs, corresponding to a peak power of 60 TW at a 10 Hz repetition rate. This system uses a cryogenically-cooled Ti:sapphire final amplifier and generates focused peak intensities in excess of 10$$^{20}$$W/cm$$^2$$.

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