Complete Characterization of Phase and Amplitude of Bichromatic Extreme Ultraviolet Light
Complete Characterization of Phase and Amplitude of Bichromatic Extreme Ultraviolet Light
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双色极紫外光相位和振幅的完整表征
DOI：
10.1103/physrevlett.123.213904
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发表时间：
2019
影响因子：
8.6
通讯作者：
et al.
中科院分区：
文献类型：
--
作者：
Di Fraia Michele、Plekan Oksana、Callegari Carlo、Prince Kevin C.、Orimo Yuki、Tugs Oyunbileg、Sato Takeshi、Ishikawa Kenichi L.;et al.
现在可以使用种子自由电子激光器产生强烈的、相互相干的多谐波极紫外光光束，并且谐波之间的相位差可以以阿秒的精度进行调谐。然而，相位的绝对值通常不确定。我们提出了一种精确确定基波及其二次谐波的绝对相位关系以及振幅比的方法。除了实验数据外，只需要几个容易计算的理论参数。
Intense, mutually coherent beams of multiharmonic extreme ultraviolet light can now be created using seeded free-electron lasers, and the phase difference between harmonics can be tuned with attosecond accuracy. However, the absolute value of the phase is generally not determined. We present a method for determining precisely the absolute phase relationship of a fundamental wavelength and its second harmonic, as well as the amplitude ratio. Only a few easily calculated theoretical parameters are required in addition to the experimental data.