Beam smoothing by lens array with spectral dispersion |
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Authors: | Shenlei Zhou Zunqi Lin Xiujuan Jiang |
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Institution: | National Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, Shanghai 201800, People’s Republic of China |
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Abstract: | A scheme of combining technology of lens array (LA) and smoothing by spectral dispersion (SSD) is introduced to improve the irradiation uniformity in laser fusion based on the earlier works on LA. The feasibility of the scheme is also analyzed by numerical simulation. It shows that a focal pattern with flat-top and sharp-edge profile could be obtained, and the irradiation nonuniformity can fall down from 14% with only LA to 3% with both SSD and LA. And this smoothing scheme is depended less on the incidence comparing to other smoothing methods. The preliminary experiment has demonstrated its effectiveness. |
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Keywords: | Irradiation non-uniformity Smoothing by spectral dispersion Lens array |
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