JPS Conf. Proc. 1, 015095 (2014) [5 pages]
Proceedings of the 12th Asia Pacific Physics Conference (APPC12)
Current Status and Future Prospects of “J-KAREN” — High Contrast, High Intensity Laser for Studying Relativistic Laser-Matter Interactions
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Quantum Beam Science Directorate and Kansai Photon Science Institute, Japan Atomic Energy Agency, Kizugawa, Kyoto 619-0215, Japan
Received June 28, 2013
We present the design and characterization of a high-contrast, petawatt-class Ti:sapphire chirped-pulse amplification (CPA) laser system. Two saturable absorbers and low-gain optical parametric chirped-pulse amplification (OPCPA) preamplifier in the double CPA laser chain have improved the temporal contrast to 1.4 × 1012 on the subnanosecond time scale at 70 terawatt level. Final uncompressed broadband pulse energy is 28 J, indicating the potential for reaching peak power near 600 terawatt. We also discuss the going upgrade to over petawatt level at a 0.1 Hz repetition rate briefly.
©2014 The Physical Society of Japan
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