在全光接入技术中,光码分多址(OCDMA)以其抗干扰性强、保密性好以及用户接入灵活等优点,成为当前研究热点。光码分多址技术中的关键技术之一是地址码的编解码,一维编码方案有素数码,光正交码等,采用了波长和时间的二维编码主要有素数跳频码,二维光正交码等。采用二维编码的光码分多址可以大大增加系统用户容量,更适合于高性能、多用户、接入灵活的全光接入网。 In all-optical access technology, optical code division multiple access (OCDMA) has become the current research hotspot because of its strong anti-interference, good confidentiality and user access flexibility. Optical code division multiple access technology is one of the key technologies address code encoding and decoding, one-dimensional encoding scheme for the well-known digital, optical orthogonal code, the use of wavelength and time of the two-dimensional encoding mainly prime frequency hopping code, two Dimensional light orthogonal code. The optical code division multiple access with two-dimensional code can greatly increase the system user capacity, and is more suitable for a high-performance, multi-user and flexible access optical access network.