3 June 2002 Optimal design of boundary-modulated diffractive optical elements for general beam shaping
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The inherent feature of the coherent optics is the speckle phenomena. To reduce the spiral speckle in the diffraction image generated by the diffractive optical element, we designed the boundary modulated diffractive optical element. The spiral speckles can be removed by introducing an appropriate smooth initial phase to the image plane and conserving the smoothness of it during the iteration process of the iterative Fourier transform algorithm. To conserve the smoothness of the phase on the image plane, the aperture shape of the diffractive optical element is modified optimally. The diffractive optical element with deformed aperture decreases the transmission efficiency. TO increase the transmission efficiency, the initial phase distribution of the image plane is optimized by use of the genetic algorithm.
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Hwi Kim, Hwi Kim, Byungchoon Yang, Byungchoon Yang, Jinhong Park, Jinhong Park, Byoungho Lee, Byoungho Lee, } "Optimal design of boundary-modulated diffractive optical elements for general beam shaping", Proc. SPIE 4659, Practical Holography XVI and Holographic Materials VIII, (3 June 2002); doi: 10.1117/12.469259; https://doi.org/10.1117/12.469259

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