在谱域和时域同时编码的二维OCDMA系统是增加系统容量的主要方案.在一维光码盘和光码环的基础上,设计出直观描述二维λ-t地址码的几何装置-二维光码柱面,直观便捷地描述二维码字结构,给出基于光码柱面的二维码码字相关性分析方法.并根据光码柱面,建立了在光码集本身导出二维码码字容量的分析理论.所得结果与直接引用电通信中的Johnson界得出的结果一致.因此,二维光码柱面给二维的相关性分析和码字容量研究提供了便捷有效的工具.
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