4.1 Article Proceedings Paper

Status and progress of the J-KAREN-P high intensity laser system at QST

期刊

HIGH ENERGY DENSITY PHYSICS
卷 36, 期 -, 页码 -

出版社

ELSEVIER
DOI: 10.1016/j.hedp.2020.100771

关键词

Titanium-doped sapphire (Ti:sapphire) laser; Chirped-pulse amplification (CPA); Optical parametric chirped-pulse amplification (OPCPA); Aberration; Temporal contrast; High field science

资金

  1. Japan Society for the Promotion of Science (JAPS) KAKENHI [JP 16H03911, 19H00669, 16K05506, 15F15772]
  2. Japan Science and Technology Agency (JST) [PRESTO JPMJPR16P9]
  3. Grants-in-Aid for Scientific Research [16K05506, 15F15772, 19H00669] Funding Source: KAKEN

向作者/读者索取更多资源

We report on femtosecond petawatt laser pulses at 0.1 Hz that combine both Ti:sapphire chirped-pulse amplification (CPA) and optical parametric CPA (OPCPA) techniques. High temporal contrast of 10(12) prior to the main pulse of 10 J output energy has been demonstrated with a cleaned high-energy seeded low gain OPCPA pre-amplifier. Intensities as high as 10(22)W/cm(2) on target have been achieved by focusing a wave-front corrected 0.3 PW laser by adaptive optics and reflective-type optics with an f /1.3 off-axis parabolic mirror. We describe the origins of the pre-pulses generated by the post-pulses through non-linear processes and demonstrate the removal of the pre-pulses by switching to optical components with a small wedge angle at our petawatt laser facility. We also briefly introduce some experimental results. Exploration of new regimes in high field science is now possible with the unprecedented laser intensity levels of the J-KAREN-P laser.

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