Dubietis Audrius, Tamosauskas Gintaras, Fibich Gadi, Ilan Boaz
Department of Quantum Electronics, Vilnius University, Sauletekio Avenue 9, Building 3, LT-2040 Vilnius, Lithuania.
Opt Lett. 2004 May 15;29(10):1126-8. doi: 10.1364/ol.29.001126.
We provide what is to our knowledge the first experimental evidence that multiple filamentation (MF) of ultra-short pulses can be induced by input beam ellipticity. Unlike noise-induced MF, which results in complete beam breakup, the MF pattern induced by small input beam ellipticity appears as a result of nucleation of annular rings surrounding the central filament. Moreover, our experiments show that input beam ellipticity can dominate the effect of noise (transverse modulational instability), giving rise to predictable and highly reproducible MF patterns. The results are explained with a theoretical model and simulations.
据我们所知，我们提供了首个实验证据，证明超短脉冲的多重成丝现象（MF）可由输入光束椭圆率诱导产生。与导致光束完全分裂的噪声诱导MF不同，由小输入光束椭圆率诱导产生的MF图案是围绕中心细丝的环形环成核的结果。此外，我们的实验表明，输入光束椭圆率可以主导噪声（横向调制不稳定性）的影响，从而产生可预测且高度可重复的MF图案。我们用理论模型和模拟对结果进行了解释。
