The 16th International Symposium on Photonics and Optoelectronics (SOPO 2025) will be held from July 18 to 20, 2025 in Kunming, China. SOPO 2025 will bring together top researchers from Asian Pacific areas, North America, Europe and around the world to exchange research results and address open issues in all aspects of Photonics and Optoelectronics.