Streak camera diagnostic of femtosecond laser spark
Streak camera diagnostic of femtosecond laser spark
复制标题
飞秒激光火花条纹相机诊断
DOI：
10.1117/12.571805
复制
发表时间：
2005
期刊：
影响因子：
9.2
通讯作者：
N. Vorobiev
中科院分区：
文献类型：
--
作者：
S. V. Garnov;V. Konov;V. I. Lozovoĭ;A. A. Malyutin;M. Schelev;N. Vorobiev
本文报道了利用超快条纹相机对飞秒激光等离子体进行时间分辨光谱研究。在空气、氮气、氩气和氦气中，用130 fs、1 mJ、800 nm的单脉冲激光激发了激光火花。焦点处的最大激光辐射强度高达2.5 × 10 ~（17）W/cm ~ 2。在皮秒时间分辨率下观测了激光等离子体连续谱、谱线表以及二次和三次谐波的时间行为。我们相信，飞秒激光火花中的二次谐波产生的记录是第一次。
We report on time-resolved spectroscopy of femtosecond laser plasma with the use of ultrafast streak cameras. Laser spark was excited in air, nitrogen, argon or helium by tightly focused Ti: sapphire 130 fs, 1mJ, 800 nm single laser pulses. Maximum laser radiation intensity in the focal point was up to 2.5x1017 W/cm2. The time behavior of laser plasma continuum, tabulated spectral lines as well as the second and third harmonics were observed with pico-femtosecond time resolution. We believe that the second harmonic generation in femtosecond laser spark was recorded for the first time.