中国光学（中英文）2025，Vol.18Issue(5)：1243-1254,12.DOI:10.37188/CO.EN-2025-0001
含非正则涡旋对的部分相干光束的空间相关奇点与轨道角动量谱
Spatial correlation singularities and orbital angular momentum spectra of partially coherent beams with noncanonical vortex pairs
摘要
Abstract
By introducing noncanonical vortex pairs to partially coherent beams,spatial correlation singular-ity(SCS)and orbital angular momenta(OAM)of the resulting beams are studied using the Fraunhofer dif-fraction integral.The effect of noncanonical strength,off-axis distance and vortex sign on spatial correlation singularities in far field is stressed.Furthermore,far-field OAM spectra and densities are also investigated,and the OAM detection and crosstalk probabilities are discussed.The results show that the number of dislo-cations of SCS always equals the sum of absolute values of topological charges for canonical or noncanonic-al vortex pairs.Although the sum of the product of each OAM mode and its power weight equals the algebra-ic sum of topological charges for canonical vortex pairs,the relationship no longer holds in the noncanonical case except for opposite-charge vortex pairs.The changes of off-axis distance,noncanonical strength or co-herence length can lead to a more dominant power in adjacent mode than that in center detection mode,which also indicates that crosstalk probabilities of adjacent modes exceed the center detection probability.This work may provide potential applications in OAM-based optical communication,imaging,sensing and computing.关键词
空间相关奇点/轨道角动量/非正则涡旋/部分相干光束Key words
spatial correlation singularity/orbital angular momentum/noncanonical vortex/partially coher-ent beam分类
数理科学引用本文复制引用
梅超,程科,易小雯,付彩瑛,曾体贤..含非正则涡旋对的部分相干光束的空间相关奇点与轨道角动量谱[J].中国光学（中英文）,2025,18(5):1243-1254,12.基金项目
四川省自然科学基金(No.2023NSFSC0049) （No.2023NSFSC0049）
四川省科技厅项目(No.2023ZYD0175) （No.2023ZYD0175）
智能光电系统感知及应用四川省高校重点实验室开放课题(No.ZNGD2401)Supported by Natural Science Foundation of Sichuan Province(No.2023NSFSC0049) （No.ZNGD2401）
Sichuan Science and Technology Program of China(No.2023ZYD0175) （No.2023ZYD0175）
Key Laboratories of Sensing and Application of Intelli-gent Optoelectronic System in Sichuan Provincial Universities(No.ZNGD2401) （No.ZNGD2401）
