Nonlinear Propagation Dynamics of Intense Ultrashort Laser Pulses

本文对飞秒强激光脉冲在各种条件下通过透明固体和气体的传输进行了理论和实验研究。 这些研究将描述输入功率高于灾难性自聚焦崩溃阈值功率的情况下的时间，空间和光谱动力学特征。研究的制度包括等离子体形成起主导作用的情况下，将探讨的可能性，一个三维孤子脉冲本地化的空间和时间可以产生。还将研究超短脉冲通过填充有惰性气体的空芯波导的非线性传播动力学，预计该系统将提供与体相介质相互作用中不存在的新动力学。拟议的研究将对超快科学的各个领域产生影响，包括飞秒激光损伤，光学介质中的长距离脉冲传播，以及超短脉冲气体中的参数和谐波产生。

A theoretical and experimental investigation will be made of the propagation of intensefemtosecond laser pulses through transparent solids and gases under a wide variety of conditions. These studies will characterize the temporal, spatial, and spectral dynamics for the case in which the input power is above the threshold power for catastrophic self-focusing collapse. Regimes of study include the case in which the plasma formation plays a dominant role, and the possibility will be explored that a three-dimensional soliton pulse localized in space and time can be produced. Nonlinear propagation dynamics of ultrashort pulses through hollow-core waveguides filled with a noble gas will also be investigated, and it is expected this system will offer novel dynamics that are not present in interactions with bulk media. The proposed research will have implications for various areas of ultrafast science including femtosecond laser damage, long-range pulse propagation in optical media, and parametric and harmonic generation in gases with ultrashort pulses.