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

作　　者：李朝阳 冷雨欣[2] 李儒新[1,2,3] Li Zhaoyang;Leng Yuxin;Li Ruxin(Zhangjiang Laboratory,Shanghai 201210,China;State Key Laboratory of High-Field Laser and Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;ShanghaiTech University,Shanghai 201210,China)

机构地区：[1]张江实验室,上海201210 [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]上海科技大学,上海201210

出　　处：《激光与光电子学进展》2024年第5期1-12,共12页Laser & Optoelectronics Progress

基　　金：张江实验室青年基金项目。

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。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 pulsefront 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 wavepacket,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 crossapplication 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 

分 类 号：O436[机械工程—光学工程]