Xinying Li, Xiaofan Qian, Nini Meng. Optimization Algorithm of Diffractive Optical Elements for Beam Shaping[J]. Acta Optica Sinica, 2019, 39(11): 1105003
- Acta Optica Sinica
- Vol. 39, Issue 11, 1105003 (2019)
Fig. 1. Schematic of geometric mapping principle
Fig. 2. 2f beam shaping system
Fig. 3. Numerical simulation results of geometric mapping theory. (a) Phase distribution of DOE; (b) intensity distribution of output beam; (c) intensity distribution of target beam
Fig. 4. Amplitude constraint diagram of improved GS algorithm
Fig. 5. Effect of α on output beam size and intensity
Fig. 6. Flow chart of algorithm. (a) Improved GS algorithm; (b) overall flow of the algorithm
Fig. 7. Performance of output beam at different α values
Fig. 8. Design results of DOE. (a)(c) Phase and beam shaping results of the proposed algorithm; (b)(d) phase and beam shaping results of the traditional GS algorithm
Fig. 9. Design results of DOE. (a)(c) DOE phase and beam shaping results of circular flat-topped light; (b)(d) DOE phase and beam shaping results of circular light
Fig. 10. Optical path of laser beam shaping
Fig. 11. Experimental results. (a)(c) Beam shaping results and intensity profiles of GS algorithm; (b)(d) beam shaping results and intensity profiles of the proposed algorithm
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Table 1. Comparison of simulation results of proposed algorithm and GS algorithm algorithm%
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Table 2. Comparison of experimental results of proposed algorithm and GS algorithm%
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