采用改进混合优化算法首次设计并制作了口径168.7 mm的连续衍射光学元件实现类环形光束入射,输出直径650μm超宽焦斑光束均匀照明.用Nd:YAG脉冲激光器1.064 μm波长激光进行实验,获得了与设计尺寸相符、边缘陡峭、无中心尖锐脉冲、具有极好的离焦宽容性的宽焦斑,但焦斑顶部不均匀性较大.对此进行了深入的模拟分析,结果表明:焦斑顶部较大的光强调制主要来源于现有的工艺及实验条件误差.
参考文献
| [1] | Arieli Y, Ozeri S, Eisenberg N, et al. Design of a diffractive optical element for wide spectral bandwidth [J]. Opt.Lett., 1998, 23(11): 823-824. |
| [2] | Prather D W, Shi S Y, Bergey J S. Field stitching algorithm for the analysis of electrically large diffractive optical elements [J]. Opt. Lett., 1999, 24(5): 273-275. |
| [3] | Fu Y Q, Ngoi K A B, Ong N S. Diffractive optical elements with continuous felief fabricated by focused ion beam for monomode fiber coupling [J]. Opt. Exp., 2000, 7(3): 141-147. |
| [4] | Liu J S, et al. Iterative algorithm for the design of diffractive phase elements for laser beam shaping [J]. Opt.Lett., 2002, 27(16): 1463-1465. |
| [5] | Wu Yuan, Yu Junzhong, Zhao Yiqiong, et al. Precise design of the pure phase elements [C]∥ Proc. SPIE, 2002,4914: 430-437. |
| [6] | Deng X G, Li Y P, Qui Y, et al. Phase mixture algorithm applied to design pure phase elements [J]. Chinese Journal of Lasers (中国激光), 1995, B4(5): 447-454 (in Chinese). |
| [7] | Ma Honglian, Sun Kexi, Yi Rongqing, et al. Experimental emasurment and a simple model for soft X-ray conversion efficiency from 0.35μm laser-irradiated Al planar target [J]. Chinese Journal of Atomic and Molecular Physics (原子与分子物理学报), 1995, 12(3): 223-228 (in Chinese). |
| [8] | Tan Q F, Yan Y B, Jin G F, et al. Study and fabrication of binary optical element for ICF target uniform illumination [J]. High Power Laser and Particle Beams (强激光与粒子束), 1999, 11(4): 445-449 (in Chinese). |
| [9] | Wang Wei, Pei Ming, Yongping Li, et al. Analysis for the latitude of phase elements used for inertial confinement fusion [J]. Opto-Electronic Engineering (光电工程), 1999, 26(5): 63-68 (in Chinese). |
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