The 16th International Symposium on Photonics and Optoelectronics (SOPO 2025) will be held from July 18 to 20, 2025 in Kunming, China.SOPO 2025 is co-organized by IPOC State Key Lab (Beijing University of Posts and Telecommunications),Harbin Institute of Technology,Spectral Branch of Jilin Provincial Society for Analysis and Testing Technology, University of Larestan, Iran and other institutions.