Self-focusing and plasma channels formation for non-axisymmetric optical schemes under different orientation of laser pulse linear polarization
arXiv:1504.02641
Abstract
Filamentation of linear polarized ultrashort laser pulses in non-axisymmetric optical schemes with preferential directions to the optical axis in dependence on the beam orientation was experimentally studied. Our experiments demonstrated strong influence of a laser beam orientation on self-focusing of the beam and plasma generation during filamentation. Maximum of linear plasma density generated by an astigmatic laser pulse was different in both meridional and sagittal foci and depended on the beam orientation. A difference of linear plasma density was observed in the case of superposition of two parts of the laser beam going through a two-hole diaphragm depending on the beam orientation and through a slit for collinear and normal slit orientation relative to the beam orientation. Laser pulses in IR and UV wavelength domains led to similar result.
arXiv commentThis paper has been withdrawn by the author due to identification evidence of pulse polarization orientation doesn't affect plasma channel formation by rotating of the polarization via halfwave plate. The reason of the effect is still unclear, but it is connected with the beam orientation