arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1609.00766physics.optics
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自由空间非线性光束合成成丝

Free-Space Nonlinear Beam Combining Towards Filamentation

Shermineh Rostami, Wiktor Walasik, Daniel Kepler, Matthieu Baudelet, Natalia M. Litchinitser, Martin Richardson

摘要:

多重定向为操纵空气中的电磁波开辟了新的自由度。然而,如果没有控制,多个细丝的相互作用,包括吸引,排斥或融合往往导致形成复杂的无序细丝分布。此外,在复丝形成实验中常规使用的高功率光束经常引起显著的表面损伤。激光灯丝的应用越来越多,需要对其形成和传播进行精细控制。我们证明,实验和理论上,与初始功率低于临界值的超短光束的吸引和融合,使最终形成的灯丝下游。细丝的形成被延迟到空间中的预定距离,避免了对外部束流光学的光学损坏,同时仍然能够实现具有可控特性的坚固细丝,就像由单个高功率束形成的一样。这种范例为灯丝工程引入了新的机会,消除了使用高峰值功率激光源的需要。

英文摘要:

Multi-filamentation opens new degrees of freedom for manipulating electromagnetic waves in air. However, without control, multiple filament interactions, including attraction, repulsion or fusion often result in formation of complex disordered filament distributions. Moreover, high power beams conventionally used in multi-filament formation experiments often cause significant surface damage. The growing number of applications for laser filaments requires fine control of their formation and propagation. We demonstrate, experimentally and theoretically, that the attraction and fusion of ultrashort beams with initial powers below the critical value enable the eventual formation of a filament downstream. Filament formation is delayed to a predetermined distance in space, avoiding optical damage to external beam optics while still enabling robust filaments with controllable properties as if formed from a single high power beam. This paradigm introduces new opportunities for filament engineering eliminating the need to use high peak power lasers sources.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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