Spatio-temporal dynamics of electron density in femtosecond laser microplasma of gases
Spatio-temporal dynamics of electron density in femtosecond laser microplasma of gases
复制标题
飞秒激光气体微等离子体中电子密度的时空动力学
DOI：
10.1134/s1054660x09060206
复制
发表时间：
2009
期刊：
影响因子：
1.2
通讯作者：
D. K. Sychev
中科院分区：
文献类型：
--
作者：
V. Bukin;S. V. Garnov;V. Strelkov;T. V. Shirokikh;D. K. Sychev
研究了钛蓝宝石激光器高强度基次谐波和次谐波脉冲多次电离在不同压力下微体积气体中产生的飞秒激光等离子体的形成和演化。应用干涉技术对等离子体进行精确的超快光学诊断。介绍了激光诱导等离子体中折射率和自由电子密度瞬时空间分布的干涉图处理和重建的数值技术。研究了折射率和自由电子密度的时空分布，空间分辨率为~ 1 μ m，时间分辨率为~ 70 fs。
The formation and evolution of femtosecond laser plasma produced in microvolumes of gases at different pressures upon their multiply ionization by high intensity pulses of fundamental and second harmonics of a Ti:sapphire laser is studied. The interferometric technique for precise ultrafast optical diagnostics of such plasma was applied. The numerical technique of interferogram processing and reconstruction of instant spatial distribution of refractive index and free electron density in laser-induced plasma applied for this proposes is described. The spatiotemporal distribution of the refractive index and free electron density were studied with a spatial resolution of ∼1 μ m and a temporal resolution of ∼70 fs.