Regulation and control method for rapid light intensity and polarization rotation light field

The invention relates to a regulation and control method for a rapid light intensity and polarization rotation light field. According to the method, a laser array is divided into sub-beam pairs whichare combined in pairs; a frequency difference exists between two sub-beams of each sub-beam pair, the sub-beams are changed into different vortex beams through different spiral phase plates respectively, then the vortex beams are changed into left-rotating circularly polarized light and right-rotating circularly polarized light through different polarization control plates respectively, and finally the two sub-beams are superposed to generated the rapid light intensity and polarization rotation light field. The light field can be used for improving the uniformity of far-field focal spots of the laser array and reducing back scattering of laser in plasma. 本发明涉及一种光强和偏振快速旋转的光场调控方法。该方法是将激光阵列分为两两组合的子光束对，每一子光束对的两子光束间存在频率差，分别经过不同的螺旋相位板变成不同的涡旋光束，再分别经过不同的偏振控制板变成左旋圆偏振光和右旋圆偏振光，最后使两子光束叠加，从而产生光强和偏振快速旋转的光场。该光强和偏振快速旋转的光场可用于提高激光阵