Abstract
We study the effect of Two-Photon Absorption (TPA) nonlinear losses on Gaussian pulses, with power that exceeds the critical power for self-focusing, propagating in bulk kerr media. Experiments performed in fused silica and silicon highlight a spontaneous reshaping of the input pulse into a pulsed Bessel beam. A filament is formed in which sub-diffractive propagation is sustained by the Bessel-nature of the pulse.
| Original language | English |
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| Pages (from-to) | 8213-8218 |
| Number of pages | 6 |
| Journal | Optics Express |
| Volume | 16 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 26 May 2008 |