基于萤火虫算法的衍射光学器件设计

针对采用经典的 Gerchberg-Saxton算法设计的衍射光学器件(DOE)产生的光强分布相对误差较大, 以及采用传统群智能优化算法设计的DOE光能利用率不高的不足,本文提出了利用萤火 虫算法(FA)实现衍射光学器件设计的方法,兼顾了优化效率和 优化结果。以激光匀束器的设计为例,在模拟计算中,利用FA经过5000次迭代,得到的激光匀束器的光能利用率高达92.91%,绝对误差值低至0.60%。

Design of diffractive optical elements based on firefly algorithm

Two most important factors in diffractive optical element (DOE) design are error value and efficiency of light utilization of intensity distribution in the output plane.The DOE designed by classical Gerchberg-Saxton algorithm possesses high efficiency of light utilization but large relative error.Tradition intelligence optimizatio n algorithms are inferior to Gerchberg-Saxton algorithm in efficiency of light utilization in DOE design,but surpass the latter in error control.In this paper,a detailed approach based on firefly alg orithm is proposed against the deficiencies of both Gerchberg-Saxton algorithm and traditional intelligenc e optimization algorithms.The design of laser homogenizer is reported as an i llustration example in which high efficiency and beam uniformity are achieved.In the simulations,the laser ho mogenizer with efficiency of light utilization up to 92.91% and relative error down to 0.60% is achieved after 5000iterations by making use of the firefly algorithm.