کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1537533 | 996589 | 2011 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Formation and evolution of intense, post-filamentation, ionization-free low divergence beams Formation and evolution of intense, post-filamentation, ionization-free low divergence beams](/preview/png/1537533.png)
The mechanisms related to the formation and propagation of post-filamentation intense light channels were rigorously investigated experimentally and numerically. It was found that they originate from a hot spot formed by diffraction of the pulse energy reservoir onto the plasma. Once the hot spot was formed, a channel with intensity estimated at 0.5 TW/cm2 could maintain its diameter over several tens of meters such that air was not ionized, but the self-focusing produced was sufficiently high to balance linear diffraction. This propagation regime is of high interest to propagate high intensity laser pulses with limited losses.
Research Highlights
► The propagation of femtosecond pulses after filamentation in air was investigated experimentally and numerically over 50 m.
► A low divergence intense light channel, without ionization, was observed over the entire propagation path.
► This propagation regime is of high interest to propagate high intensity pulses with limited losses.
Journal: Optics Communications - Volume 284, Issue 14, 1 July 2011, Pages 3601–3606