کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11007778 1840507 2019 23 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Speckle-reduced holographic beam shaping with modified Gerchberg-Saxton algorithm
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Speckle-reduced holographic beam shaping with modified Gerchberg-Saxton algorithm
چکیده انگلیسی
Holographic laser beam shaping using a spatial light modulator can provide flexible adaptation of the intensity profile. However, speckle noise exists in the shaped beams, which reduces the beam quality seriously. In this paper, a new method is proposed to implement noise reduced flat-top beam shaping. The Gerchberg-Saxton (GS) algorithm with special spherical initial phase profile is adopted to calculate the phase-only hologram. When the spherical phase distribution is properly selected, the speckle free flat-top beam with high diffraction efficiency and low root-mean-square error can be obtained. Both simulations and experiments are performed to verify the feasibility of the proposed method. The comparison with the conventional GS algorithm using a random initial phase distribution is also carried out.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 433, 15 February 2019, Pages 44-51
نویسندگان
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