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Towards a control of multiple filamentation by spatial regularization of a high-power femtosecond laser pulse |
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| Authors: | VP Kandidov N Akozbek M Scalora OG Kosareva AV Nyakk Q Luo SA Hosseini SL Chin |
| Institution: | (1) International Laser Center, Physics Department, Moscow State University, Moscow, 119992, Russia;(2) Time Domain Corporation, Cummings Research Park, 7057 Old Madison Pike, Huntsville, AL 35806, USA;(3) AMSAM-WS-RD-ST, US Army Aviation and Missile Command, Huntsville, AL 35898-5000, USA;(4) Departement de Physique, de Genie Physique et d Optique and Centre dOptique, Photonique et Laser, Universite Laval, Quebec, G1K 7P4, Canada |
| Abstract: | We propose a new method for controlling randomly generated multiple filaments during the propagation of femtosecond laser pulses in optical media. The method is based on introducing a periodic amplitude modulation of the transverse beam profile. It is shown both experimentally and numerically that the introduction of a periodic mesh into a propagation path of a femtosecond near-infrared laser pulse leads to a deterministic spatial distribution of multiple filaments in the presence of initial random fluctuations. As a result, the number of filaments is increased as compared to the random case. PACS 42.65.Jx; 42.25.Bs; 42.60.Jf |
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