Paraxial Gaussian wave beam propagation in an anisotropic inhomogeneous plasma
Paraxial Gaussian wave beam propagation in an anisotropic inhomogeneous plasma
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各向异性非均匀等离子体中的近轴高斯波束传播
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
A. Peeters
中科院分区：
文献类型：
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作者：
E. Poli;G. Pereverzev;A. Peeters
光束跟踪技术描述了电磁波在短波长范围内的光束传播，包括衍射效应，而不是由通常的几何光学描述。它涉及一组常微分方程：确定中心或参考射线，并计算其周围的光束轮廓和相阵面的形状。这里，这些方程是针对高斯光束获得的。本文给出了非均匀磁化等离子体中平板几何垂直传播的解析解。由于介质的各向异性，梁的横截面会发生强烈的变形。讨论了截面的旋转和相波前曲率的旋转。
The beam tracing technique describes electromagnetic wave beam propagation in the short wavelength limit, including diffraction effects, not described by the usual geometric optics. It involves a set of ordinary differential equations: a central or reference ray is determined and around this the beam profile and the shape of the phase front are calculated. Here, these equations are obtained for a Gaussian wave beam. Analytic solutions in an inhomogeneous magnetized plasma are given for perpendicular propagation in a slab geometry. The beam is found to show a strong deformation of its cross section due to the anisotropy of the medium. The rotation of the cross section and that of the curvature of the phase front are discussed.