Abstract: The structure of OCDMA over WDM-PON system was proposed, the performance of this system was analyzed. The simulation results show that when OCDMA and WDM were combined in passive optical network by inserting a group of OCDMA subscribers in each WDM channel, the number of subscribers can satisfy the demand easily, and the performance of the system can be guaranteed.

Key words: optical code division multiple access(OCDMA), wavelength division multiplexing(WDM), passive optical network(PON)