Designing diffractive phase plates for beam smoothing in the fractional Fourier domain |
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| Authors: | Feng Di Yan Yingbai Lu Si Kehan Tian Jin Guofan |
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| Affiliation: | State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, China |
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| Abstract: | A new modification of the output plane constraint is used in the iterative algorithm for designing diffractive phase plates (DPPs) to produce spatial beam smoothing in the fractional Fourier (FRT) domain. Compared with previously published algorithms, this algorithm can provide faster convergence, more powerful ability to overcome the local minimum problem and better smoothing quality. By computer simulation, it has shown that the DPP designed by this algorithm has the advantages of high uniformity at the main lobe, low profile error and steep edge. |
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