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Vectorial dispersive shock waves on an incoherent landscape
Journal of the Optical Society of America B ( IF 1.9 ) Pub Date : 2020-11-05 , DOI: 10.1364/josab.405099
J. Nuño , C. Finot , J. Fatome

We study numerically and experimentally the impact of temporal randomness on the formation of analog optical blast waves in nonlinear fiber optics. The principle of operation is based on a two-components nonlinear interaction occurring between a partially coherent probe wave co-propagating in a normally dispersive optical fiber together with an orthogonally polarized intense short pulse. The cross-polarized interaction induces a dual phase singularity in the probe profile which leads to the formation of two sharp fronts of opposite velocities. An optical blast wave is then generated and leads to an expanding rarefaction area surrounded by two dispersive shock waves which regularize the shock onto the probe landscape. Here, we focus our study on the impact of randomness in the shock formation. In particular, we show that the lack of coherence in the probe wave acts as a strong diffusive term, which is able to hamper or inhibit the shock formation. Our experimental observations are confirmed by numerical predictions based on a system of two incoherently coupled nonlinear Schrödinger Manakov equations.

中文翻译:

非相干景观上的矢量色散冲击波

我们通过数值和实验研究时间随机性对非线性光纤中模拟爆炸波的形成的影响。工作原理是基于在正常色散光纤中共同传播的部分相干探测波与正交偏振的强短脉冲之间发生的两成分非线性相互作用。交叉极化的相互作用会在探针轮廓中引起双相奇异性,从而导致以相反的速度形成两个尖锐的前沿。然后产生爆炸光波,并导致被两个分散的冲击波围绕的扩大的稀疏区域,这两个冲击波将冲击规律化到探头周围。在这里,我们将研究重点放在随机性对冲击形成的影响上。尤其是,我们表明,探测波中缺乏相干性是一个很强的扩散项,它能够阻碍或抑制激波的形成。我们的实验观察得到了基于两个非相干耦合非线性SchrödingerManakov方程组的数值预测的证实。
更新日期:2020-12-02
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