绿光LED产生高阶Bessel光的自再现  

Self-reconstruction of high-order Bessel beams generated by green LED light source

作　　者：何西[1] 吴逢铁[1] 李攀[1] 孙川[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建省光传输与变换重点实验室,厦门361021

出　　处：《中国科学：物理学、力学、天文学》2015年第1期54-62,共9页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(批准号:61178015);福建省自然科学基金(编号:2012J01278)资助项目

摘　　要：基于Hankel波理论分析了非相干光源产生高阶Bessel光束的自再现的可能性,利用交叉谱密度公式模拟了非相干绿光LED光源产生的一阶Bessel光束经过轴上圆形障碍物后的自再现光场分布,实验上通过由绿光LED发出的光场经过螺旋相位板和轴棱锥后产生一阶Bessel光束,并在光轴上放置圆形障碍物、方形障碍物来验证非相干光源产生的高阶Bessel光束的自再现特性,实验结果和理论模拟基本吻合,研究结果对于利用非相干光源实现多点光捕获和微粒操控有重要参考价值.Based on the Hankel wave theory, the possibility of self-reconstruction of incoherent source high-order Bessel beams is analyzed. The cross-section light intensity distribution of first-order Bessel beam generated by green LED light source after on-axis circular obstacle is simulated by cross-spectral density function. In the experimental aspect, we lead the light generated from green light source passing through spiral phase plate and axcion to generate first-order Bessel beams, and put a circular obstacle and a square obstacle on the axis respectively, to demonstrate the self-reconstruction property of incoherent source high-order Bessel beams. The experimental results are accorded well with the theoretical simulation. The research result has an important reference value for the micromanipulation of particles in multiple planes by usinz incoherent light.

关 键 词：高阶Bessel光束 绿光LED 自再现 轴棱锥 螺旋相位板 

分 类 号：TN312.8[电子电信—物理电子学]