超短脉冲贝塞尔光束的非近轴效应对传输的影响
Non-paraxial effect of ultrashort pulsed Bessel beams on their propagation
-
摘要: 对超短脉冲贝塞尔光束在近轴近似和非近轴情况下自由空间中的传输作了研究。结果表明，其空间波形在传输中保持贝塞尔形状不变，不受非近轴效应影响；然而当空间参数较大时，非近轴效应影响超短脉冲贝塞尔光束的时间波形。Abstract: The propagation of ultrashort pulsed Bessel beams in free space within and beyond the paraxial approximation is studied. It is shown that the nonparaxial effect does not affect their spatial pulse profile, which retains the Bessel shape unchanged upon propagation, whereas it affects their temporal pulse form if the spatial parameter becomes relatively large. The condition, under which the paraxial approximation is valid, is found to be ＜ min/2c, where min denotes the minimum frequency of the pulse spectrum and cis the velocity of light.
-
Key words:
- non-paraxial effect /
- pulsed bessel beam /
- propagation in free space
-
点击查看大图
计量
- 文章访问数: 2409
- HTML全文浏览量: 318
- PDF下载量: 535
- 被引次数: 0
下载:
