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首页> 外文会议>Shanghai International Conference on Laser Medicine and Surgery >Development of Hightly Adavanced Soft X-Ray Lases for Biomedical and Nano-Laser Medicine Applications
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Development of Hightly Adavanced Soft X-Ray Lases for Biomedical and Nano-Laser Medicine Applications

机译：用于生物医学和纳米激光医学应用的高度先进软X射线激光器的开发

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摘要

Current activities on our research of soft X-ray lasers and higher harmonic generations using intense, subpicosecond lasers are reviewed. Especially for soft X-ray lasers we experimentally demonstrate that by longitudinally pumping 2-mm-long molybdenum preformed plasma with high-intensity 475 fs duration laser pulse, a highly directive soft-X-ray laser at 18.9 nm wavelength is generated. The divergence of the beam is evaluated to be of the submillirad order, and only requires pump laser energy of 150 mJ. Simulations show that the pedestal in the main pump pulse can generate electron density and gain profiles with large spatial gradients, which result in the selective amplification of low-order transverse modes. The present result is the demonstration of an efficient and alternative method of improving the spatial coherence of X-ray lasers with amplified spontaneous emission medium, with possibilities of becoming an excellent tool to explore various application experiments. In higher harmonic generation, topics related to observation of blue shift due to collisionless absorption process is described.
机译：综述了我们对软X射线激光器和更高谐波的研究的目前的活动，综述了亚单稳态激光器。特别是对于软X射线激光器，我们通过实验证明，通过具有高强度475FS持续时间激光脉冲的纵向泵送2mm长的钼预制等离子体，产生18.9nm波长的高度指向软X射线激光器。评估光束的分歧是潜水顺序的，并且只需要150 MJ的泵激光能量。仿真表明，主泵脉冲中的基座可以产生具有大量空间梯度的电子密度和增益曲线，从而导致低阶横向模式的选择性放大。目前的结果是证明了提高具有扩增自发发射介质的X射线激光器的空间相干性的有效和替代方法，具有成为探索各种应用实验的绝佳工具的可能性。在更高的谐波产生中，描述了与碰撞吸收过程引起的蓝色移位观察的主题。

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