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. 2004 Jun 11;92(23):235002.
doi: 10.1103/PhysRevLett.92.235002. Epub 2004 Jun 10.

Guiding of intense laser beams in highly ionized plasma columns generated by a fast capillary discharge

B M Luther  1 , Y Wang, M C Marconi, J L A Chilla, M A Larotonda, J J Rocca
Affiliations

Guiding of intense laser beams in highly ionized plasma columns generated by a fast capillary discharge

B M Luther et al. Phys Rev Lett. .

Abstract

We have demonstrated the guiding of laser pulses with peak intensities up to 2.2 x 10(17) W/cm(2) in a 5.5 cm long plasma column containing highly charged Ar ions generated by a fast capillary discharge. A rapid discharge-driven hydrodynamic compression guides progressively lower order modes through a plasma with increasing density and degree of ionization, until the guide collapses on axis. The lowest order mode (FWHM approximately 50 microm) is guided with 75% transmission efficiency shortly before the plasma reaches the conditions for lasing in Ne-like Ar. The subsequent rapid plasma expansion forms a significantly leakier and more absorbent guide.

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