一种用于高斯光束整形的衍折射光学元件的研究

由衍射光学元件（ＤＯＥ）和折射透镜组成的衍折射光学元件，用于较大功率密度和光束半径的高斯光束的聚焦。运用ＧＳ算法，用外围的ＤＯＥ产生一个偏移的高斯光束分布，与中心的折射透镜会聚后的高斯光束相干叠加在一个很小的聚焦圆内，在聚焦圆内的光强分布不平整度小于５％。给出了一个圆域基模高斯光束的整形分布，计算误差小于３．５％。

Study of a diffractive refractive optical element used for Gaussian beams shaping

A focusator composed of diffractive optical element(DOE) and a refractive lens, is used for Gaussian beams with higher power density and lager beam radius. The G S algorithm is empoyed to reshape an outer part of the beam to achieve a displaced Gaussian distribution. The reshaped beam and the inner beam through the lens part are interferential superposed in a round focused area, the distribution in the area is smooth. The computing results show a Gaussian beams reshaping error less than 3 5%.