Wavefront Correction and Customization of Focal Spot of 100 TW Ti:Sapphire Laser System

概要

論文の詳細を見る
The measurement and correction of wavefront aberrations of the 100 TW Ti:sapphire laser beam are presented. Several monochromatic aberrations, such as astigmatism ($Z_{2}^{-2}$, $Z_{2}^{2}$), coma ($Z_{3}^{-1}$), trefoil ($Z_{3}^{-3}$, $Z_{3}^{3}$), and spherical aberration ($Z_{4}^{0}$) are observed in the 100 TW Ti:sapphire laser beam as well as defocus ($Z_{2}^{0}$), which is responsible for the converging or diverging of a laser pulse. An adaptive optics system using a bimorph deformable mirror successfully corrected a monochromatic wavefront in the 100 TW Ti:sapphire laser beam. The customization of the focal spot is also investigated using the adaptive optics system for research on the efficient generation of a high-energy electron beam. The increase in the depth of focus is demonstrated and the temporal broadening is calculated when the spherical aberration is introduced using the adaptive optics system.
2007-12-15