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Updated: May 14, 2026
20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
Temporal contrast enhancement of petawatt-class laser pulses
Hiromitsu Kiriyama1, Takuya Shimomura, Hajime Sasao
1Kansai Photon Science Institute, Japan Atomic Energy Agency, Kizugawa, Kyoto, Japan. kiriyama.hiromitsu@jaea.go.jp
Abstract:
We demonstrate the temporal contrast enhancement in a petawatt-class Ti:sapphire chirped-pulse amplification (CPA) laser system. An extra saturable absorber, introduced downstream after 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 subnanosecond 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.
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