Characteristics of a laser system in complex field and its complex self-synchronization Xiu Zhao, Jian Liu, Jun Mou, Chenguang Ma and Feifei Yang Eur. Phys. J. Plus, 135 6 (2020) 507 Published online: 19 June 2020 DOI: 10.1140/epjp/s13360-020-00509-2