Zhang Xiang, Pierangeli Davide, Conti Claudio, Fan Dianyuan, Zhang Lifu
Opt Express. 2018 Dec 10;26(25):32971-32980. doi: 10.1364/OE.26.032971.
We investigate Airy-soliton interaction in a nonlinear fiber with Raman effect. We find that Airy solitons may fuse upon interaction at a position that can be controlled by a proper engineering of the Airy tail direction. This control allows us to generate Airy solitons with varying deceleration. At variance with the case of two solitons interaction, Raman-induced soliton self-frequency shift (SSFS) is strongly enhanced when the leading soliton is replaced with the accelerating Airy pulse and slightly suppressed for the decelerating one. These notable features are ascribed to the unique properties of asymmetrical Airy pulses with a switchable direction of the oscillatory tails. We show the way these processes are uncovered unambiguously by cross-correlation frequency resolved optical gating. We also investigate the impact of chirp imposed on the input pulse on the SSFS dynamics. Our results not only provide a new way to manipulate the SSFS, but may help to improve the control of soliton fusion events during supercontinuum generation, optical rogue waves and giant dispersive waves formation.
我们研究了具有拉曼效应的非线性光纤中的艾里孤子相互作用。我们发现，艾里孤子在相互作用时可能会在一个可以通过适当设计艾里尾方向来控制的位置融合。这种控制使我们能够产生具有不同减速的艾里孤子。与两个孤子相互作用的情况不同，当领先孤子被加速艾里脉冲取代时，拉曼诱导的孤子自频移（SSFS）会强烈增强，而对于减速的艾里脉冲则会略有抑制。这些显著特征归因于具有可切换振荡尾方向的不对称艾里脉冲的独特性质。我们展示了通过互相关频率分辨光学门控明确揭示这些过程的方法。我们还研究了施加在输入脉冲上的啁啾对SSFS动力学的影响。我们的结果不仅提供了一种操纵SSFS的新方法，而且可能有助于改善在超连续谱产生、光学 rogue 波和巨大色散波形成过程中对孤子融合事件的控制。
