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Mid-infrared dispersive wave generation in gas-filled photonic crystal fibre by transient ionization-driven changes in dispersion

机译:瞬态电离驱动色散变化在充气光子晶体光纤中产生中红外色散波

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摘要

Gas-filled hollow-core photonic crystal fibre is being used to generate ever wider supercontinuum spectra, in particular via dispersive wave emission in the deep and vacuum ultraviolet, with a multitude of applications. Dispersive waves are the result of nonlinear transfer of energy from a self-compressed soliton, a process that relies crucially on phase-matching. It was recently predicted that, in the strong-field regime, the additional transient anomalous dispersion introduced by gas ionization would allow phase-matched dispersive wave generation in the mid-infrared—something that is forbidden in the absence of free electrons. Here we report the experimental observation of such mid-infrared dispersive waves, embedded in a 4.7-octave-wide supercontinuum that uniquely reaches simultaneously to the vacuum ultraviolet, with up to 1.7 W of total average power.
机译:充气中空光子晶体光纤被用于产生越来越宽的超连续谱,特别是通过在深紫外和真空紫外中的色散波发射,具有多种应用。色散波是自压缩孤子进行能量非线性传输的结果,该过程主要依赖于相位匹配。最近预测,在强场状态下,由气体电离引入的额外瞬态异常色散将允许在中红外中产生相匹配的色散波,这是在缺乏自由电子的情况下所禁止的。在这里,我们报告了这种中红外色散波的实验观察结果,该色散波嵌入一个4.7倍频宽的超连续谱中,该谱峰唯一同时到达真空紫外线,总平均功率高达1.7W。

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