A flat-topped beam can be achieved by a suitable choice of the transform order for the Cosine-Gaussian beams with the modulation parameter.
对给定调制参数的余弦-高斯光束，通过适当选取分数傅里叶变化阶数可以获得平顶的光强分布。
The influence of atmospheric turbulence on partially coherent flat-topped Gaussian beam is studied numerically in this paper.
本文用数值模拟的方法研究了湍流对通过其后的部分相干平顶高斯光束的影响。
The results show that we can conveniently control the intensity distribution of the partially coherent flat-topped beam by use of the fractional Fourier transform optical system.
结果表明，使用分数傅立叶变换，我们可以方便地控制部分相干平顶光束的光强分布。
Recently, a new kind of partially coherent flat-topped beam, which may be treated as the superposition of several different GSM beams, was introduced.
最近，一种由高斯-谢尔模光束叠加而成的部分相干平顶光束引起了人们的兴趣。
In chapter 5, the propagation properties of partially coherent flat-topped beam are analyzed by tensor method.
第五章主要利用张量方法分析了部分相干平顶光束的一些传输特性。
A model of an annular flat-topped vortex beam based on multi-Gaussian superimposition is proposed.
基于多高斯函数叠加方法，提出了环形平顶涡旋光束模型。
The spherical aberration results in an increase of the beam quality factor of flat-topped beams.
球差使平顶光束通过透镜后的光束质量因子增大；
The spherical aberration results in an increase of the beam quality factor of flat-topped beams.
球差使平顶光束通过透镜后的光束质量因子增大；
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