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Opt Lett. 2012 Aug 15;37(16):3363-5. doi: 10.1364/OL.37.003363.

Temporal contrast enhancement of petawatt-class laser pulses.

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1
Kansai 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.

PMID:
23381258
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