Nonlinear high harmonic generation in atoms, molecules and nanostructures: A potential ultrafast and high energy light source;
原子、分子和纳米材料中非线性高次谐波的产生:一个潜在的极超快和高能量的新型光源
In this paper,an introduction is give for the development and applications of ultrashort laser pulse technique in the fields of liquid molecule and ultrafast phenomema.
概述了超短激光脉冲技术的发展进程、研究进展及其在液态分子研究方面、超快现象等领域的应
In this paper, the four developed periods for ultrafast lasers weve precented and their content, focus points were discusded.
本文阐述了超快激光发展的四个阶段及其内容、特点。
Temperature field under ultra fast cooling (UFC) is simulated by finite-difference method.
从导热微分方程数值差分解法入手,对轧件在粗轧和精轧之间进行超快冷却后的温度场进行了数值模拟·结果表明:当板坯初始温度为1200℃,经过6道次粗轧后,以3m/s的速度进入超快冷却区,当水冷换热系数为10kW/(m2·℃)时可以得到70℃/s的冷却速度;另外由于超冷后表面温度的强烈回复,故在进行精轧时,必须进行温度修正,保证轧件在精轧区开轧温度的精度
In the authors' points,the main developing trends and research frontier in this field should be focused on the followingfour directions, first, high-power and large-energy laser crystals; second, practical mid-infraredlaser crystals; third, laser crystals emitting at UV and visible regions; fourth, ultrafast laser gainand amplifier media suitable for LD pumping.
在分析激光晶体研究现状的基础上,指出其未来应用及主要发展趋势:高功率、大能量激光晶体;中红外激光晶体;蓝绿紫和可见光激光晶体;LD抽运超快激光增益和放大介质晶体。
Basing on both the spectra analysis of ultrafast lasers and the speckle statistical theory,we derive the autocorrelation function of ultrafast dynamic speckle intensity.
从超快激光谱分析和散斑统计理论出发,推导出了超快散斑光强自相关函数,由此研究了超快动态散斑随时间和空间的演化规律,发现了超快散斑的一些基本特征,如散斑颗粒中存在干涉条纹结构及其空间周期随时间减小等。