| Autor: |
Kandidov, V.P., Fedorov, V.Yu. |
| Zdroj: |
Quantum Electronics; February 2005, Vol. 34 Issue: 12 p1163-1168, 6p |
| Abstrakt: |
Stationary self-focusing of collimated elliptic Gaussian beams is studied numerically. It is shown that the critical self-focusing power increases with increasing the axial ratio of the initial elliptic cross section. Self-focusing is accompanied by oscillations of the beam transverse size caused by the competition between the diffraction-limited divergence and nonlinear compression. As the power of the beam with the axial ratio a/b3 increases, aberration self-focusing occurs, at which, after the formation and competition of several intensity maxima in the beam cross section, a global maximum appears at the beam centre, which forms a nonlinear focus. The approximation formula for the self-focusing distance is generalised to elliptic beams. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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