Druon F, Chériaux G, Faure J, Nees J, Nantel M, Maksimchuk A, Mourou G, Chanteloup J C, Vdovin G
Center for Ultrafast Optical Sciences, University of Michigan, 1006 I.S.T. Building, 2200 Bonisteel Boulevard, Ann Arbor, Michigan 48109-2099, USA.
Opt Lett. 1998 Jul 1;23(13):1043-5. doi: 10.1364/ol.23.001043.
Wave-front correction and focal spot improvement of femtosecond laser beams have been achieved, for the first time to our knowledge, with a deformable mirror with an on-line single-shot three-wave lateral shearing interferometer diagnostic. Wave-front distortions of a 100-fs laser that are due to third-order nonlinear effects have been compensated for. This technique, which permits correction in a straightforward process that requires no feedback loop, is also used on a 10-TW Ti:sapphire-Nd:phosphate glass laser in the subpicosecond regime. We also demonstrate that having a focal spot close to the diffraction limit does not constitute a good criterion for the quality of the laser in terms of peak intensity.
据我们所知，首次通过带有在线单次三波横向剪切干涉仪诊断的变形镜实现了飞秒激光束的波前校正和焦斑改善。由三阶非线性效应引起的100飞秒激光的波前畸变已得到补偿。这种技术允许在无需反馈回路的直接过程中进行校正，也用于亚皮秒级的10太瓦钛宝石 - 钕磷酸盐玻璃激光器。我们还证明，就峰值强度而言，具有接近衍射极限的焦斑并不构成激光质量的良好标准。
