物理学报2009，Vol.58Issue(11)：7662-7667,6.
飞秒激光烧蚀铝靶产生喷射物的超快脉冲数字全息诊断
Ultra-fast pulsed digital holographic diagnosis of ejected material in femtosecond laser ablation of aluminum
摘要
Abstract
The dynamic process of material ejection and plasma evolution in single 50 fs laser pulse ablation of aluminum target is investigated using pulsed digital micro-holography, and highly temporally and spatially resolved dynamic digital holograms are obtained. The secondary material ejection induced by the thermoelastic wave is observed in the holograms, and at the same time, we firstly report the phenomenon of anomalous fringe shift at large time delays that results from the effect of the ejected material towards the probe beam of 400 run wavelength. Through digital reconstruction, the two-dimensional phase shift distribution of the probe beam is obtained. By employing inverse Abel transform, we also obtained the dynamic process of spatial and temporal evolution of refractive index and free electron density distribution of the plasma. The structure and composition of the ejected material is analyzed according to its optical properties which are obtained through experiment and calculation.关键词
脉冲数字全息/飞秒激光烧蚀/超快时间分辨/等离子体Key words
pulsed digital holography/femtosecond laser ablation/ultra-fast time resolved/plasma分类
数理科学引用本文复制引用
胡浩丰,王晓雷,李智磊,张楠,翟宏琛..飞秒激光烧蚀铝靶产生喷射物的超快脉冲数字全息诊断[J].物理学报,2009,58(11):7662-7667,6.基金项目
国家自然科学基金重点项目(批准号:60838001)与高等学校博士学科点专项科研基金(批准号:20070055029)资助的课题.Project supported by the State Key Program of National Natural Science of China (Grant No. 60838001) and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20070055029). （批准号:60838001）
