等离子体基X射线Laser的红外场修饰类氖激活介质对椭圆偏振亚飞秒脉冲的放大
Amplification of Elliptically Polarized Sub-Femtosecond Pulses in IR-Field-Dressed Neon-Like Active Medium of a Plasma-Based X-ray Laser
摘要：
提出了一种在等离子体基X射线激光器的类锯齿形活性介质中放大由红外（IR）激光场的高次谐波构成的圆偏振或椭圆偏振极紫外（XUV）辐射的亚飞秒脉冲的训练的方法，另外用基频IR场的复制品照射。结果表明，在放大过程中，脉冲的椭圆率可以保持或增加。实验结果表明，在波长为3.9 μ m的红外激光场作用下，在活性介质中产生了基于类钛离子的X射线激光。
英文摘要：
We propose a method for amplifying a train of sub-femtosecond pulses of circularly or elliptically polarized extreme ultraviolet (XUV) radiation constituted by high-order harmonics of an infrared (IR) laser field, in a neon-like active medium of a plasma-based X-ray laser, additionally irradiated with a replica of a fundamental frequency IR field. It is shown that the ellipticity of the pulses can be maintained or increased during the amplification process. The experimental implementation is suggested in an active medium of an X-ray laser based on neon-like Ti^{12+} ions irradiated by an IR laser field with a wavelength of 3.9 microns.
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