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Femtosecond filamentation in air at low pressures. Part II: Laboratory experiments

Abstract : We present experimental studies of filamentation of a femtosecond laser pulse in air at low pressures. The evolution of the filament has been studied by measuring along the propagation axis the conductivity and the sub-THz emission from the plasma channel. We show experimentally that the filamentation process occurs at pressures as low as 0.2 atm in agreement with numerical simulations. Experimental and numerical results [A. Couairon, M. Franco, G. Méchain, T. Olivier, B. Prade, A. Mysyrowicz, Opt. Commun., submitted for publication] are compared and the possible sources of discrepancy are discussed.
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Submitted on : Thursday, March 4, 2010 - 7:37:35 PM
Last modification on : Wednesday, May 11, 2022 - 3:22:04 PM

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Grégoire Méchain, Thomas Olivier, Michel A. Franco, Arnaud Couairon, Bernard Prade, et al.. Femtosecond filamentation in air at low pressures. Part II: Laboratory experiments. Optics Communications, Elsevier, 2006, 261 (2), pp.322-326. ⟨10.1016/j.optcom.2005.11.041⟩. ⟨hal-00461561⟩

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