Last date for submission of paper: 14-Jul-2020; Contact person: Rolin; The 13th International Symposium on Photonics and Optoelectronics SOPO 2020 will be held from August 14 to 16, 2020 in Kunming, China. SOPO 2020 is co-organized by by Wuhan University, Beijing University of Posts and Telecommunications, IPOC State