A high-intensity highly coherent soft X-ray femtosecond laser seeded by a high harmonic beam
A high-intensity highly coherent soft X-ray femtosecond laser seeded by a high harmonic beam
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DOI：
10.1038/nature02883
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发表时间：
2004-09
期刊：
影响因子：
64.8
通讯作者：
Philippe Zeitoun;Gabriel Faivre;S. Sebban;Tomas Mocek;A. Hallou;Marta Fajardo;D. Aubert;Philippe Balcou;F. Burgy;D. Douillet;S. Kazamias;G. D. Lachèze-Murel;T. Lefrou;S. Pape;P. Mercère;Hamed Merdji;A. Morlens;J. Rousseau;Constance Valentin
中科院分区：
文献类型：
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作者：
Philippe Zeitoun;Gabriel Faivre;S. Sebban;Tomas Mocek;A. Hallou;Marta Fajardo;D. Aubert;Philippe Balcou;F. Burgy;D. Douillet;S. Kazamias;G. D. Lachèze-Murel;T. Lefrou;S. Pape;P. Mercère;Hamed Merdji;A. Morlens;J. Rousseau;Constance Valentin
几十年来，同步加速器提供了宝贵的软X射线源，其应用在许多科学和技术领域取得了重大进展。但是软X射线的未来应用-例如在结构生物学中-预计需要比同步加速器提供的脉冲更短的持续时间（飞秒）和更高的能量（毫焦耳）。软X射线自由电子激光器应能满足这些要求，但数量有限;因此，对射束时间的压力可能相当大。激光驱动的软X射线源提供了一种相对便宜且广泛可用的替代方案，但在寻求高强度时遇到了实际瓶颈。在这里，我们建立和表征的软X射线激光链，显示这些瓶颈，原则上可以克服。通过将高谐波激光源（作为种子光束）提供的高光学质量与高能软X射线激光等离子体放大器相结合，我们产生了工作在10 Hz的桌面软X射线飞秒激光，并表现出完全饱和、高能量、高相干性和全极化。这种技术应该很容易适用于所有现有的激光驱动的软X射线设施。
Synchrotrons have for decades provided invaluable sources of soft X-rays, the application of which has led to significant progress in many areas of science and technology. But future applications of soft X-rays—in structural biology, for example—anticipate the need for pulses with much shorter duration (femtoseconds) and much higher energy (millijoules) than those delivered by synchrotrons. Soft X-ray free-electron lasers should fulfil these requirements but will be limited in number; the pressure on beamtime is therefore likely to be considerable. Laser-driven soft X-ray sources offer a comparatively inexpensive and widely available alternative, but have encountered practical bottlenecks in the quest for high intensities. Here we establish and characterize a soft X-ray laser chain that shows how these bottlenecks can in principle be overcome. By combining the high optical quality available from high-harmonic laser sources (as a seed beam) with a highly energetic soft X-ray laser plasma amplifier, we produce a tabletop soft X-ray femtosecond laser operating at 10 Hz and exhibiting full saturation, high energy, high coherence and full polarization. This technique should be readily applicable on all existing laser-driven soft X-ray facilities.