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聚焦高阶Bessel-Gauss光束重建的理论和实验研究 被引量:4

Experimental and theoretical study on the reconstruction of focused high order Bessel-Gauss beam
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摘要 提出利用薄透镜元件对聚焦后的高阶Bessel-Gauss光束进行重建.基于衍射理论,分析了高阶Bessel-Gauss光束聚焦后的重建行为,数值模拟高阶Bessel-Gauss光束经薄透镜聚焦再通过另一薄透镜重建的三维光场分布和截面光强分布图.结果表明,高阶Bessel-Gauss光束经单个薄透镜后产生中空的局域空心光束,在焦点位置处为圆环,尔后迅速发散;在焦点后合适位置处放入另一薄透镜可矫正焦点后发散的光束,使得其后光场不变,仍满足Bessel分布;实验结果与理论分析相符合.研究结果对光镊、粒子捕获与操控具有一定的指导意义. Reconstruction of focused high order Bessel-Gauss beam by using thin lens is proposed.Based on the diffraction theory,reconstruction behavior of focused high order Bessel-Gauss beam is analyzed.The three-dimensional optical intensity distribution and the cross-section optical intensity distribution of the high order Bessel-Gauss beam focused by first thin lens,and then reconstructed by the second thin lens are numerical simulated.Result shows that the high order Bessel-Gauss beam passing through the single thin lens can generate Bottle beam,and the bright ring is obtained at focus.To rectify the beam divergence after focus,another thin lens is introduced at suitable position.After that,the beam keeps the Bessel distribution.Experiment is conducted,and experimental results are in agrement with the theoretical analyses.Research result shows its significance in providing a guidance for optical tweezers,particle trapping and controlling.
出处 《物理学报》 SCIE EI CAS CSCD 北大核心 2012年第1期150-154,共5页 Acta Physica Sinica
基金 国家自然科学基金(批准号:60977068 6117805) 国家高功率激光物理重点实验室开放基金(批准号:SG-001102) 华侨大学学科重点建设项目 泉州市科技重点项目(批准号:2011G9)资助的课题~~
关键词 衍射理论 传输矩阵 高阶Bessel-Gauss光束 重建 diffraction theory propagation matrix high order Bessel-Gauss beam reconstruction
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