Beam wander of partially coherent Airy beams
Beam wander of partially coherent Airy beams
复制标题
部分相干艾里光束的光束漂移
DOI：
10.1080/09500340.2014.887154
复制
发表时间：
2014
影响因子：
1.3
通讯作者：
Chu Xiuxiang
中科院分区：
文献类型：
--
作者：
Wen Wei;Chu Xiuxiang
研究了湍流大气中部分相干艾里光束的光束漂移。利用扩展的惠更斯-菲涅耳积分，导出了部分相干艾里光束二阶矩的解析表达式。基于Andrews提出的理论，得到了部分相干艾里光束的光束漂移的一般表达式。利用该表达式，对影响光束漂移的各种因素进行了数值模拟。结果表明，部分相干艾里光束的光束漂移随特征尺度的增大和相干长度或指数截断因子的减小而减小。当指数截断系数为0.63时，无论相干长度是多少，光束漂移值都最大。本文的研究结果为实际控制部分相干艾里光束的光束漂移提供了一种有效的方法。
The beam wander of a partially coherent Airy beam in a turbulent atmosphere was investigated. By using the extended Huygens–Fresnel integral, as analytical expression is derived for the second-order moment of a partially coherent Airy beam. Based on the theory proposed by Andrews, a general expression is obtained for the beam wander of a partially coherent Airy beam. With the help of the expression, various factors which impact on the beam wander are illustrated numerically. The results show that the beam wander of a partially coherent Airy beam decreases with the increase of the characteristic scale and the decrease of the coherent length or the exponent truncation factor. The value of the beam wander is a maximum when the exponent truncation factor is 0.63, no matter what the coherent lengths are. Our results provide an effective way to control the beam wander of a partially coherent Airy beam in practice.