Detecting orbital angular momentum of perfect optical vortex beams based on diffraction neural networks
CHENG Ke, HU Xiaonan, HE Yu, MENG Weijia, LUAN Haitao, GU Min, FANG Xinyuan,
Chinese Journal of Quantum Electronics . 2022, (2): 262 -271 .  DOI: 10.3969/j.issn.1007-5461.2022.02.006