Guiding of high-intensity laser pulses in 100mm-long hydrodynamic optical-field-ionized plasma channels

Abstract

Hydrodynamic optically-field-ionized (HOFI) plasma channels up to 100mm long are investigated. Optical guiding is demonstrated of laser pulses with a peak input intensity of $6\times 10^{17}$ W cm${}^{-2}$ through 100mm long plasma channels with on-axis densities measured interferometrically to be as low as $n_{e0}=(1.0\pm 0.3)\times 10^{17}$cm${}^{-3}$. Guiding is also observed at lower axial densities, which are inferred from magneto-hydrodynamic simulations to be approximately $7\times 10^{16}$cm${}^{-3}$. Measurements of the power attenuation lengths of the channels are shown to be in good agreement with those calculated from the measured transverse electron density profiles. To our knowledge, the plasma channels investigated in this work are the longest, and have the lowest on-axis density, of any free-standing waveguide demonstrated to guide laser pulses with intensities above $>10^{17}$ W cm${}^{-2}$.

8 pages, 5 figures, (v2:Correction of typos in abstract)

References in corpus (2)

• Low-Density Hydrodynamic Optical-Field-Ionized Plasma Channels Generated With An Axicon Lens
• Laser-heater assisted plasma channel formation in capillary discharge waveguides

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