介绍了光码分多址的技术原理。综述电子科技大学光纤通信重点实验室在波分复用/光码分多址混合网络、光正交码构作、码间干扰和双极性OCDMA系统等OCDMA通信技术方面所进行的研究工作和成果，最后指出了OCDMA系统的技术优势和面临的问题。关 键 词 光码分多址; 码型构造; 码间干扰; 双极性码; 混合网络Abstract Optical Code Division Multiple Access (OCDMA) Communications Technology is introduced in detail. The research results of the achievement of Wavelenght Division Multiple Access/ Optical Code Division Multiple Access (WDM/OCDMA) hybrid networks, construction for OOCs, multiple access interference(MAI) and bipolar OCDMA system studied. Finally, some predominances and key techniques are proposed.Key words optical code division multiple access; construction for code; multiple access interference; bipolar code; hybrid networks