Peng Yi-Ming, Xue Yu, Xiao Guang-Zong, Yu Tao, Xie Wen-Ke, Xia Hui, Liu Shuang, Chen Xin, Chen Fang-Lin, Sun Xue-Cheng. Spiral spectrum analysis and application ofcoherent synthetic vortex beamsJ. Acta Physica Sinica, 2019, 68(21): 214206. DOI: 10.7498/aps.68.20190880