CAJ | 학술논문

从艾里光束的理论基础出发,详细研究了艾里光束的远场传输特性,包括场强分布、光斑直径和桶中功率(Power in the Bucket,PIB)的演化过程.探讨了场强分布随截断因子a和任意横向刻度x0的变化规律,以及a和x0对艾里光束保持无衍射性质传输的距离 (Distance with Keeping Non-diffraction,DKNd)、演化成类高斯分布的距离(Distance in which the Evolution became similar Guassian, DEG)和自弯曲程度(Self-bending Degree,SbD)的影响.研究发现:场强分布在演化成类高斯分布过程中,DKNd、DEG和SbD都随着x0的增大而增大,DKNd和DEG随a的增大而减小,a对SbD无影响.研究了艾里光束的光斑直径和PIB的演化规律, 发现在a值不同的情况下,在传输过程中光斑直径先保持不变后增加,PIB先减小后增大,最终等于0.76.
종애리광속적이론기출출발,상세연구료애리광속적원장전수특성,포괄장강분포、광반직경화통중공솔(Power in the Bucket,PIB)적연화과정.탐토료장강분포수절단인자a화임의횡향각도x0적변화규률,이급a화x0대애리광속보지무연사성질전수적거리 (Distance with Keeping Non-diffraction,DKNd)、연화성류고사분포적거리(Distance in which the Evolution became similar Guassian, DEG)화자만곡정도(Self-bending Degree,SbD)적영향.연구발현:장강분포재연화성류고사분포과정중,DKNd、DEG화SbD도수착x0적증대이증대,DKNd화DEG수a적증대이감소,a대SbD무영향.연구료애리광속적광반직경화PIB적연화규률, 발현재a치불동적정황하,재전수과정중광반직경선보지불변후증가,PIB선감소후증대,최종등우0.76.
The propagation characteristics of Airy beam in the far-field were detailly studied, which start with the theoretical foundation, including the evolution process of intensity distribution, spot diameter and Power in the Bucket (PIB). The change regular of intensity distribution was investigated with the truncation factor a and the arbitrary scale in the transverse x0 and how do a and x0 influence the propagation Distance with Keeping Non-diffraction (DKNd), the Distance in which the Evolution became similar Guassian(DEG) and Self-bending Degree(SbD). The research shows that in the evolution process of intensity distribution which transforms into similar Guassian, the DKNd, DEG and SbD increase with the increase of x0, the DKNd and DEG decrease with the increase of a and a has no effect on SbD. The evolution regular of spot diameter and PIB was also researched. The research shows that the spot diameter fistly remain unchanged and then increases, PIB firstly decreases, then increases and is 0.76 finally in the propagation progress under different values of a.