arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.07424physics.optics
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Kerr非线性与偶阶色散的相互作用:一个无限孤子族

The interaction of Kerr nonlinearity with even-orders of dispersion: an infinite hierarchy of solitons

Antoine F. J. Runge, Y. Long Qiang, Tristram J. Alexander, Darren D. Hudson, Andrea Blanco-Redondo, C. Martijn de Sterke

摘要:

时间孤子是由负群速度色散和自相位调制平衡而产生的光脉冲。几十年来,人们只考虑二次色散,而高阶色散被认为是一种讨厌的东西。继最近报道的纯四次孤子,我们在这里提供了实验和数值证据的无限层次的孤子,平衡自相位调制和任意负纯,偶数阶色散。具体来说,我们实验证明了纯六次($β_6$),八次($β_8$)和十次($β_{10}$)色散的孤子的存在,仅限于我们的组件的性能,并显示涉及纯$16^{\rm th}$阶色散的孤子的存在的数值证据。相位分辨的时间和光谱特性表明,这些脉冲,表现出越来越多的频谱平坦度与色散阶。测得的能量宽度定标律表明超短脉冲具有显着的优势。这些结果拓宽了对孤子的基本理解,并为超快脉冲在非线性光学及其应用中的工程设计提供了新的途径。

英文摘要:

Temporal solitons are optical pulses that arise from the balance of negative group-velocity dispersion and self-phase modulation. For decades only quadratic dispersion was considered, with higher order dispersion thought of as a nuisance. Following the recent reporting of pure-quartic solitons, we here provide experimental and numerical evidence for an infinite hierarchy of solitons that balance self-phase modulation and arbitrary negative pure, even-order dispersion. Specifically, we experimentally demonstrate the existence of solitons with pure-sextic ($β_6$), -octic ($β_8$) and -decic ($β_{10}$) dispersion, limited only by the performance of our components, and show numerical evidence for the existence of solitons involving pure $16^{\rm th}$ order dispersion. Phase-resolved temporal and spectral characterization reveals that these pulses, exhibit increasing spectral flatness with dispersion order. The measured energy-width scaling laws suggest dramatic advantages for ultrashort pulses. These results broaden the fundamental understanding of solitons and present new avenues to engineer ultrafast pulses in nonlinear optics and its applications.

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