自由空间中超短啁啾洛仑兹脉冲光束的空间奇异性  

Spatial Singularity of Ultroshort Chirped Lorentz Pulsed Beams in Free Space

作　　者：杨振峰[1] 

机构地区：[1]河北科技大学经济管理学院,石家庄050018

出　　处：《光子学报》2007年第B06期198-201,共4页Acta Photonica Sinica

基　　金：河北省教育厅科学研究计划(2006111)资助

摘　　要：给出了超短啁啾洛仑兹脉冲光束在自由空间中的传输方程,研究了啁啾对洛仑兹脉冲光束空间奇异性的影响.理论及数值模拟的结果表明,由于啁啾的作用,对于脉冲宽度大于一个光波振荡周期的洛仑兹脉冲光束同样存在空间奇异性.在初始位置,啁啾洛仑兹脉冲光束的空间奇异性出现在脉冲的前沿或后沿.当洛仑兹脉冲光束传输以后,啁啾洛仑兹脉冲光束的空间奇异性将更加强烈.The propagation expression for the ultrashort chirped Lorentz pulsed beams in free space is deduced analytically. The influence of the chirp on the spatial sigularity of the ultrashort Lorentz pulsed beams is studied theoretically and numerically. The numerical results show that the spatial singularity will appears as long as the chirp is enough large for the Lorentz pulsed beams whose pulse duration is longer than one even few cycle optical oscillation periods. At the initial distance the chirp affects the pulse front edge or the pulse back edge. When the pulsed beam propagates the chirp affects the spatial singularity of the ultrashort Lorentz pulsed beams seriously.

关 键 词：激光物理 超短洛仑兹脉冲光束 光束传输 啁啾 空间奇异性 

分 类 号：TN241[电子电信—物理电子学]