3 November 2003 Design of axially symmetrical diffractive phase elements implementing uniform loop focal spot
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Abstract
Axially symmetrical diffractive phase planes (DPPs) are easily fabricated and have been used in a variety of applications, especially for realizing uniform loop focal spot with steep side, flat top, flat side lobe and high efficiency. A kind of hybrid design algorithm combined ST algorithm and input-output algorithm is introduced for axially symmetrical DPPs design to realize uniform loop focal spot. The computer simulation has shown that the algorithm is robust and convergent. The DPPs has been designed to product uniform loop focal spot with high diffractive efficiency of the energy inside the loop spot, high uniformity for both main lobe and side lobe (both more than 96%), and steep side simultaneously.
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Di Feng, Yingbai Yan, Qiaofeng Tan, Haitao Liu, Guofan Jin, "Design of axially symmetrical diffractive phase elements implementing uniform loop focal spot", Proc. SPIE 5175, Laser Beam Shaping IV, (3 November 2003); doi: 10.1117/12.502570; https://doi.org/10.1117/12.502570
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