Investigation of diffractive optical element for shaping a Gaussian beam into a ring-shaped pattern |
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| Authors: | Qi Li Huide Gao Yunhua Dong Zuochun Shen Qi Wang |
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| Affiliation: | a Institute of Opto-Electronics, Harbin Institute of Technology, People's Republic of China |
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| Abstract: | To convert a given single-mode He–Ne laser beam into a ring-shaped intensity distribution, a diffractive optical element with 16 levels was designed by YG amplitude-phase retrieval and iteration algorithm. This beam shaper is investigated experimentally and compared with the results of the computer design. The results show good conformity, and the measured diffraction efficiency is 87.2%. In addition, the diffractive effect is observed when the distance between diffractive optical element and CCD is changed. |
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| Keywords: | Diffractive optical element (DOE) Ring-shaped beam YG algorithm |
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