Fig. 4
From: Universal orbital angular momentum spectrum analyzer for beams
Performances of multi OAM spectrum analyzing. a and b are two random cases, where the OAM spectra of the sent modes (pink), the simulatively (black green) and experimentally (mazarine) analyzed results are displayed. The simulated analyzing results fit well with the sent modes. While the experimentally obtained results show a little difference compared with the sent one, where the reasons come from the OAM components difference between the designed beams and the practical generated beams