从超强超短激光的脉冲前沿畸变到X形光波包的群速度控制
From Pulse-Front Distortions of Ultra-Intense Ultrashort Lasers to Group-Velocity Controls of X-Shape Optical Wave-Packets
李朝阳 1冷雨欣 2李儒新3
作者信息
- 1. 张江实验室,上海201210;中国科学院上海光学精密机械研究所强场激光物理国家重点实验室,上海201800
- 2. 中国科学院上海光学精密机械研究所强场激光物理国家重点实验室,上海201800
- 3. 张江实验室,上海201210;中国科学院上海光学精密机械研究所强场激光物理国家重点实验室,上海201800;上海科技大学,上海201210
- 折叠
摘要
超强超短激光在空间上具有大口径、在时间上具有短脉冲,因此极易产生时空耦合效应,例如脉冲前沿畸变,使得脉冲前沿和相位前沿发生时空分离,通常表现为脉冲前沿倾斜或弯曲,不利于获得预期的高聚焦光强.但当这种脉冲前沿畸变(控制)用于产生X形光波包时,却增加了一维全新的自由度,实现了光波包群速度和群加速度的自由控制,可获得超光速、亚光速、加速、减速,甚至动态可控的群速度.通过综述脉冲前沿畸变(控制)在超强超短激光中的不良影响和在X形光波包中的特殊效果,旨在为同一光学现象在不同研究方向间的交叉应用提供些许思考.
Abstract
Because ultra-intense ultra-short laser has a large beam in space and a short pulse in time,the spatiotemporal coupling effect,for example the pulse-front distortion,frequently appears,which leads to a separation between the pulse-front and the phase-front in space-time,such as the pulse-front tilt or curvature,and is not conducive to obtaining the expected high focused intensity.However,when this pulse-front distortion(control)is applied in the X-shape optical wave-packet,a new degree of freedom is introduced for freely controlling the group-velocity and the group-acceleration of the optical wave-packet,enabling superluminal,subluminal,accelerating,decelerating,and even dynamically-controllable group velocities.By reviewing the pulse-front distortion(control)'s adverse effects in the ultra-intense ultra-short lasers and its special performances in the X-shape optical wave-packets,we try to provide some reflections on the cross-application of the same optical phenomenon in different research directions.
关键词
时空耦合/脉冲前沿/相位前沿/X形光波包/群速度/群加速度Key words
spatiotemporal coupling/pulse-front/phase-front/X-shape optical wave-packet/group-velocity/group-acceleration引用本文复制引用
出版年
2024
NETL
NSTL
万方数据