Extending plasma channel of filamentation with a multi-focal-length beam.
Extending plasma channel of filamentation with a multi-focal-length beam.
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DOI：
10.1364/oe.24.004029
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发表时间：
2016-02
期刊：
影响因子：
3.8
通讯作者：
Zuofei Hong;Qingbin Zhang;S. Ali Rezvani;P. Lan;P. Lu
中科院分区：
文献类型：
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作者：
Zuofei Hong;Qingbin Zhang;S. Ali Rezvani;P. Lan;P. Lu
我们提出了一种新的方案，延长了等离子体通道的多焦距光束照射。代替由常规凸透镜引入的一个焦距，由空间光调制器（SLM）调制的多焦距光束在有限但严格操纵的激光能量的扩展范围内产生灯丝。结果表明，该计划是能够增加一倍的灯丝长度相比，一个单透镜计划与2 mJ的输入脉冲。灯丝的位置和长度可以通过改变空间振幅和相位或采用更高的能量来简单地调谐。此外，延长的灯丝长度导致产生范围从可见光（维斯）到红外（IR）域的加宽的连续谱。这种多功能的计划提供了一个有效的工具，涉及超快非线性光学的各种应用的发展。
We propose a novel scheme that lengthens the plasma channel in filamentation with a multi-focal-length beam. Instead of one focal length introduced by a conventional convex lens, the multi-focal-length beam modulated by a spatial light modulator (SLM) produces a filament in an extended range with limited but strictly manipulated laser energy. The results show that the scheme is capable of doubling the filament length compared to a single-lens scheme with a 2-mJ input pulse. The filament location and length can be simply tuned by altering the spatial amplitude and phase or employing higher energies. Furthermore, the extended filament length leads to the generation of a broadened continuum ranging from visible (VIS) to infrared (IR) domain. This versatile scheme offers an efficient tool for the development of a variety of applications involving ultrafast nonlinear optics.