给出了二维λ-t光正交方阵码2D-OOSC的设计方案, 重点讨论了2D-OOSC码字的相关性及码字参数对系统性能的影响。详细分析了2D-OOSC系统的用户容量以及由多用户干扰引起的误码性能。研究表明，在占用相同带宽的条件下，系统的用户容量远大于基于1D-OOC的WDM-CDMA混合系统，特别是在传输距离不太远的局域网中，光纤色散引起的传输损失较小。基于2D-OOSC地址码的 OCDMA系统有着现实的应用价值。

The scheme of 2-dimensions optical orthogonal square codes (2D - OOSC) in optical code-division multiple-access (OCDMA) networks is given in this paper. The influence of coding parameters to the performance of the system is mainly discussed. It is proved that the relativity of the codeword satisfies the system requirement, and the system BER based on multiple user interference is ascertained. The results indicate that the number of simultaneous users that can be contained in this system will be much larger than that in the system with ID-OOC under the same conditions, the total transmitting capacity of the system will reach the level of Tb/s, and the performance of 2D — OOSC system will be largely enhanced, especially under the heavy transmitting traffic.