Dong Miao, Lu XingYuan, Zhao Chengliang, Cai Yangjian, Yang Yuanjie
Opt Express. 2018 Dec 10;26(25):33035-33043. doi: 10.1364/OE.26.033035.
The partially coherent elegant Laguerre-Gaussian (ELG) beam is of importance and exhibits extraordinary characteristics in many fields, such as optical communications and optical trapping. Here, we show a method to measure the topological charge of a partially coherent ELG beam. We find that the number of ring dislocations in the far-field complex degree of coherence is equal to the topological charge |l| of a partially coherent ELG beam, and which is confirmed experimentally. Our results will be useful for applications using partially coherent ELG beams.
