Fast focusing of short-pulse lasers by innovative plasma optics toward extreme intensity

M. Nakatsutsumi; A. Kon; S. Buffechoux; P. Audebert; J. Fuchs; R. Kodama

doi:10.1364/OL.35.002314

Optics Letters
Vol. 35,
Issue 13,
pp. 2314-2316
(2010)
•https://doi.org/10.1364/OL.35.002314

Fast focusing of short-pulse lasers by innovative plasma optics toward extreme intensity

M. Nakatsutsumi, A. Kon, S. Buffechoux, P. Audebert, J. Fuchs, and R. Kodama

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M. Nakatsutsumi, A. Kon, S. Buffechoux, P. Audebert, J. Fuchs, and R. Kodama, "Fast focusing of short-pulse lasers by innovative plasma optics toward extreme intensity," Opt. Lett. 35, 2314-2316 (2010)

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Abstract

We developed a compact plasma-based focusing optic that, in one step, increases the peak intensity of ultrahigh-intensity lasers without modifying the laser system itself. By using a plasma-based focusing optic with extremely small f-number ( $f / 0.4$ ), we have experimentally demonstrated a fivefold reduction of the focal spot size (from 4.4 to $0.9 μm$ ), thus producing an at least eightfold enhancement of the laser light intensity. This innovative plasma-based optic opens the way for the study of high-energy-density and high-field science at intensities greater than presently available.

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Shot Type	$E_{L}$ on-target	$F_{EPM}$	Proton Max Energy
Direct	$2.5 J$	—	$2.2 (\pm 1) MeV$
EPM	$2.5 J$	$210 J \cdot {cm}^{- 2}$	$10.5 (\pm 0.7) MeV$
Direct	$9.1 J$	—	$7.0 (+ 1.3 / - 0.4) MeV$
EPM	$0.86 J$	$80 J \cdot {cm}^{- 2}$	$5.6 (\pm 1.1) MeV$

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