Adaptive Flattop Beam Shaping With a Spatial Light Modulator Controlled by the Holographic Tandem Method

作者：Wang, Dong^*; Jin, Baoquan^*; Wang, Yu; Jia, Peng; Cai, Dongmei; Gao, Yan

来源：IEEE Photonics Journal, 2016, 8(1): 6500107.

DOI：10.1109/JPHOT.2016.2515764

• Diffractive optics
• laser beam shaping
• spatial light modulator

This paper reports the realization of a closed-loop feedback system, which consists of a spatial light modulator controlled by the holographic tandem method, for adaptive far-field flattop beam shaping. The holographic tandem method iteratively adjusts the phase distributions to be written into the two different regions of a spatial light modulator so that the Gaussian beam can be converted into an annular flattop beam for better uniformity. The technique described in this paper can provide a promising convenient way to create the desired flattop intensity profile of a beam on a focal plane, which could be applied in applications involving laser fusion and laser precision machining.

• 出版日期2016-2
• 单位太原理工大学