Iterative algorithm for the design of diffractive phase elements for laser beam shaping.
Iterative algorithm for the design of diffractive phase elements for laser beam shaping.
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DOI：
10.1364/ol.27.001463
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发表时间：
2002-08
期刊：
影响因子：
3.6
通讯作者：
J. S. Liu;M. Taghizadeh
中科院分区：
文献类型：
--
作者：
J. S. Liu;M. Taghizadeh
提出了一种改进的用于自由空间激光整形的衍射位相元设计迭代算法。该算法从Gerchberg-Saxton方法开始，得到稳定解。这之后是几次新的迭代，其中修改的约束函数被施加在傅立叶域中，而每次迭代的相位分布保持不变。对于适合于惯性约束聚变应用的超高斯光束整形，12次方超高斯光束对应参数的整束幅度和强度分布的均方误差分别约为0.035和9.75×10~(-3)。大约97.4%的入射能量会聚到所需区域。
An improved iterative algorithm for designing diffractive phase elements for laser beam shaping in free space is presented. The algorithm begins with the Gerchberg-Saxton approach to obtain a stable solution. This is followed by several new iterations, in which modified constraining functions are imposed in the Fourier domain while the phase distribution of each iteration remains unchanged. For super-Gaussian beam shaping suitable for inertial confinement fusion applications the mean-square errors of the amplitude and the intensity profile of the entire beam fitted to the corresponding parameters of the 12th-power super-Gaussian beam are approximately 0.035 and 9.75x10(-3), respectively. Approximately 97.4% of the incident energy is converged into the desired region.