Slimmed optical neural networks with multiplexed neuron sets and a corresponding backpropagation training algorithm. - Yi-Feng Liu; Rui-Yao Ren; Dai-Bao Hou; Hai-Zhong Weng; Bo-Wen Wang; Ke-Jie Huang; Xing Lin; Feng Liu; Chen-Hui Li; Chao-Yuan Jin (CoRR, 2023)