具有余弦-高斯关联结构函数部分相干贝塞尔-高斯光束的传输性质及四暗空心光束的产生

发布时间：2018-07-13 13:04

【摘要】：基于广义惠更斯-菲涅耳衍射积分公式,获得了余弦-高斯关联结构函数部分相干贝塞尔-高斯光束交叉谱密度函数通过近轴ABCD光学系统传输时的解析表达式.并因此探讨了该类光束经过自由空间传输时光强分布的演化特性.结果表明,余弦-高斯关联部分相干贝塞尔-高斯光束在合适的参数条件下能呈现自分裂等奇异传输特性.特别地,这种自分裂可实现暗空心光束的复制,即从一个暗空心光束获得四个相似的暗空心光束.并且发现这些传输特性和关联结构函数结构密切相关,因此调控关联结构函数分布以实现调制光的相干长度和空间分布性质从而可实现操控光束传输行为.由于暗空心光束在工程技术领域的重要应用价值,本文的研究结果提供了实现四暗空心光束的可能方案,从而在激光通信、微粒操控等方面具有重要的应用前景.
[Abstract]:Based on the generalized Huygens-Fresnel diffraction integral formula, an analytical expression of the cross-spectral density function of partially coherent Bessel-Gaussian beams propagating through a paraxial ABCD optical system is obtained. Therefore, the evolution characteristics of the time intensity distribution of the beam propagating through free space are discussed. The results show that the partially coherent Bessel-Gaussian beams with cosine Gao Si correlation can exhibit some singular propagation characteristics such as self-splitting under suitable parameters. In particular, the self-splitting can achieve the replication of dark hollow beams, that is, four similar dark hollow beams are obtained from one dark hollow beam. It is found that these transmission characteristics are closely related to the structure of the correlation structure function, so the coherent length and spatial distribution of the modulated light can be realized by regulating the distribution of the correlation structure function. Because of the important application value of the dark hollow beam in the field of engineering and technology, the research results in this paper provide a possible scheme to realize the four dark hollow beams, and thus have important application prospects in laser communication, particle manipulation and so on.
【作者单位】：贵州理工学院理学院;中南大学物理与电子学院;
【基金】：贵州理工学院高层次人才引进科研启动费资助的课题~~
【分类号】：O43

【相似文献】