Depolarization of the exit beam of a neodymium-glass amplifier in the case of small-scale self-focusing

Abstract

A cylindrical cell containing GaInSn alloy and aqueous solution of KOH, a highly simplified aluminium reduction cell, is constructed. A direct current is applied to the cylindrical cell to generate the magnetic field. In a range of amplitude and frequency of vertical vibration, a stable, non-axisymmetric wave pattern is produced, and the displacement of the oscillating interface is measured by a digital camcorder. The perturbation of the magnetic field caused by the non-axisymmetric interface is measured by fluxgate sensors and processed by fast Fourier transforms. The measurements are consistent with forward calculations, and have been exploited to reconstruct the deformed interface by solving an inverse problem so as to develop magnetic field tomography to reconstruct an unknown interface between two electrically conducting fluids.

Theoretical investigation of negative influence of the cubic nonlinearity and induced birefringence on developing and using contemporary PW lasers systems

“…For B>2÷3, small-scale self-focusing occurs, resulting in beam filamentation and destruction of optical elements [13][14][15][16]. At small-scale focusing the authors of [17] observed radiation depolarization caused by depolarized noise. However, for small B the medium remained isotropic.…”