Details
| Original language | English |
|---|---|
| Pages (from-to) | 330-335 |
| Number of pages | 6 |
| Journal | Laser physics |
| Volume | 19 |
| Issue number | 2 |
| Publication status | Published - Feb 2009 |
| Externally published | Yes |
Abstract
Self-compression of intense ultrashort laser pulses inside a self-guided filament is discussed. The filament self-guiding mechanism requires a balance between diffraction, plasma self-defocusing and Kerr-type self-focusing, which gives rise to asymptotic intensity profiles on axis of the filament. The asymptotic solutions appear as the dominant pulse shaping mechanism in the leading part of the pulse, causing a pinch of the photon density close to zero delay, which substantiates as pulse compression. The simple analytical model is backed up by numerical simulations, confirming the prevalence of spatial coupling mechanisms and explaining the emerging inhomogeneous spatial structure. Numerical simulations confirm that only spatial effects alone may already give rise to filament formation. Consequently, self-compression is explained by a dynamic balance between two optical nonlinearities, giving rise to soliton-like pulse formation inside the filament.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy(all)
- Instrumentation
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: Laser physics, Vol. 19, No. 2, 02.2009, p. 330-335.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Asymptotic pulse shapes in filamentary propagation of intense femtosecond pulses
AU - Brée, C.
AU - Demircan, A.
AU - Steinmeyer, G.
PY - 2009/2
Y1 - 2009/2
N2 - Self-compression of intense ultrashort laser pulses inside a self-guided filament is discussed. The filament self-guiding mechanism requires a balance between diffraction, plasma self-defocusing and Kerr-type self-focusing, which gives rise to asymptotic intensity profiles on axis of the filament. The asymptotic solutions appear as the dominant pulse shaping mechanism in the leading part of the pulse, causing a pinch of the photon density close to zero delay, which substantiates as pulse compression. The simple analytical model is backed up by numerical simulations, confirming the prevalence of spatial coupling mechanisms and explaining the emerging inhomogeneous spatial structure. Numerical simulations confirm that only spatial effects alone may already give rise to filament formation. Consequently, self-compression is explained by a dynamic balance between two optical nonlinearities, giving rise to soliton-like pulse formation inside the filament.
AB - Self-compression of intense ultrashort laser pulses inside a self-guided filament is discussed. The filament self-guiding mechanism requires a balance between diffraction, plasma self-defocusing and Kerr-type self-focusing, which gives rise to asymptotic intensity profiles on axis of the filament. The asymptotic solutions appear as the dominant pulse shaping mechanism in the leading part of the pulse, causing a pinch of the photon density close to zero delay, which substantiates as pulse compression. The simple analytical model is backed up by numerical simulations, confirming the prevalence of spatial coupling mechanisms and explaining the emerging inhomogeneous spatial structure. Numerical simulations confirm that only spatial effects alone may already give rise to filament formation. Consequently, self-compression is explained by a dynamic balance between two optical nonlinearities, giving rise to soliton-like pulse formation inside the filament.
UR - http://www.scopus.com/inward/record.url?scp=60049098627&partnerID=8YFLogxK
U2 - 10.1134/S1054660X09020261
DO - 10.1134/S1054660X09020261
M3 - Article
AN - SCOPUS:60049098627
VL - 19
SP - 330
EP - 335
JO - Laser physics
JF - Laser physics
SN - 1054-660X
IS - 2
ER -