【摘要】 超短脉冲强激光大气传输在光学遥感、电子对抗、以及人工放电等方面具有重要的应用,例如,利用超短脉冲强激光使得远距离处的大气局域电离,其所产生的紫外辐射可以为大气组分主动荧光光谱学研究提供光源。对短脉冲强激光在大气中的传输进行了理论分析,对超短脉冲强激光大气传输中的各种线性效应及非线性效应,诸如色散效应、非线性自聚焦效应、受激拉曼散射效应、多光子电离及隧道电离效应、电离引起的能量损耗效应、相对论聚焦、有质动力激发的等离子体尾波场等效应进行了讨论,给出了一组描述超短脉冲强激光大气传输的三维非线性传输方程,为此类问题的进一步研究提供了理论基础。更多还原

【Abstract】 The propagation of ultrashort intense laser pulses in the atmosphere will have many impor-tant applications in the fields such as remote sensing,electronic countermeasures and induced electric discharges.For instance,localized ultraviolet radiation induced at a remote distance can provide a source for fluorescence spectroscopy in the atmosphere.The physics of ultrashort intense laser pulses propagation in the atmosphere is described theoretically.In this paper,the linear effects and nonlinear effects are discussed,such as dispersion,self-focusing,stimulated Raman scattering,multiphoton ionization and tunneling ionization,pulse energy depletion due to ionization,relativistic focusing,and ponderomotively excited plasma wakefields,etc.The presented equation describing ultrashort intense laser pulses propagation in the atmosphere provides a basis for the future study.更多还原