光标记交换是一种光交换新技术 ,它能有效克服光交换中的电子瓶颈 ,该技术的关键是光标记的产生和提取 .光微波副载波复用系统是一种结合微波和光通信技术的通信网络 ,该文提出了利用光微波副载波技术实现光标记的新方法 ,叙述了这种光标记的产生、提取和识别原理 ,分析了这种方法的优点和进一步研究的问题 . Optical tag switching is a new optical switching technology that can effectively overcome the electronic bottleneck in optical switching.The key of this technology is the generation and extraction of optical tag.Optical microwave subcarrier multiplexing system is a combination of microwave and optical communication technology Communication networks, this paper presents a new method of optical tagging using optical microwave subcarrier technology. The principle of generation, extraction and recognition of this optical tag is described. The advantages of this method and the further research are analyzed.