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中文摘要：
提出利用相位调制的新方法,在光路中插入螺旋相位板,使局域空心光束（Bottle beam）中心变为相位奇点,在使用轴棱锥-透镜系统产生Bottle beam时,消除了衍射等因素导致Bottle ben内部的轴上光强,这利于用Bottleben构建空心光镊系统.理论分析及数值模拟与实验结果符合很好.
英文摘要：
When generating a bottle beam by using an axicon-lens system,diffraction factors often cause a bright spot in the center of bottle beam.This central bright spot is unfavorable for the using of bottle beam in constructing hollow optical tweezers system.In the article, we propose a new method of phase modulation,by adding a spiral phase plate to optical path to make the bottle beam center have phase singularity,thereby eliminating the bright spot well.Theoretical analysis and numerical stimulation are shown to agree with the experimental results.
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