Modal effects on pump-pulse propagation in an Ar-filled capillary.
Modal effects on pump-pulse propagation in an Ar-filled capillary.
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DOI：
10.1364/oe.18.013279
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发表时间：
2010-06
期刊：
影响因子：
3.8
通讯作者：
R. Chapman;T. Butcher;P. Horák;F. Poletti;J. Frey;W. Brocklesby
中科院分区：
文献类型：
--
作者：
R. Chapman;T. Butcher;P. Horák;F. Poletti;J. Frey;W. Brocklesby
精确的三维建模的非线性脉冲在充气毛细管内的传播是必不可少的理解和提高高次谐波产生的XUV产额。我们介绍了一个新的模型的基础上的多模广义非线性薛定谔方程和一种新的空间光谱测量技术，该模型可以进行比较。该理论与实测的输出光谱和空间光谱测量结果显示，该模型正确地预测了高阶模式的贡献，光谱展宽的脉冲。来自激发的氩气的荧光用于验证预测的沿毛细管沿着的离子分布。
Accurate three-dimensional modelling of nonlinear pulse propagation within a gas-filled capillary is essential for understanding and improving the XUV yield in high harmonic generation. We introduce both a new model based on a multimode generalized nonlinear Schrödinger equation and a novel spatio-spectral measurement technique to which the model can be compared. The theory shows excellent agreement with the measured output spectrum and the spatio-spectral measurement reveals that the model correctly predicts higher order mode contributions to spectral broadening of the pulse. Fluorescence from the excited argon is used to verify the predicted ion distribution along the capillary.