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arXiv 1509.03032physics.optics
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种子自由电子激光脉冲的光谱-时间整形

Spectro-temporal shaping of seeded free-electron laser pulses

David Gauthier, Primož Rebernik Ribič, Giovanni De Ninno, Enrico Allaria, Paolo Cinquegrana, Miltcho Boyanov Danailov, Alexander Demidovich, Eugenio Ferrari, Lu… 展开作者

David Gauthier, Primož Rebernik Ribič, Giovanni De Ninno, Enrico Allaria, Paolo Cinquegrana, Miltcho Boyanov Danailov, Alexander Demidovich, Eugenio Ferrari, Luca Giannessi, Benoît Mahieu, Giuseppe Penco

摘要:

我们证明了控制和形状的种子自由电子激光(FEL)产生的极紫外(XUV)脉冲的光谱时间内容的能力。通过精确控制种子激光的线性频率啁啾,实现了对XUV光的光谱-时间特性的控制。我们的结果与现有的理论,它允许检索的时间属性(振幅和相位)的自由电子激光脉冲从测量的光谱作为一个功能的自由电子激光操作参数。此外,我们展示了第一个直接的证据,全时间相干的自由电子激光光和产生傅里叶限制脉冲的微调自由电子激光的时间相位。定制强烈的短波长脉冲的光谱-时间内容的可能性代表了在XUV到X射线光谱区域中实现高效非线性光学的第一步,并且将使得能够使用相干量子控制的方法精确操纵芯电子激发。

英文摘要:

We demonstrate the ability to control and shape the spectro-temporal content of extreme-ultraviolet (XUV) pulses produced by a seeded free-electron laser (FEL). The control over the spectro-temporal properties of XUV light was achieved by precisely manipulating the linear frequency chirp of the seed laser. Our results agree with existing theory, which allows retrieving the temporal properties (amplitude and phase) of the FEL pulse from measurements of the spectra as a function of the FEL operating parameters. Furthermore, we show the first direct evidence of the full temporal coherence of FEL light and generate Fourier limited pulses by fine-tuning the FEL temporal phase. The possibility to tailor the spectro-temporal content of intense short-wavelength pulses represents the first step towards efficient nonlinear optics in the XUV to X-ray spectral region and will enable precise manipulation of core-electron excitations using the methods of coherent quantum control.

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