中文摘要：

提出一种实现二维光码分多址系统编解码的方法。阐述编解码的原理和电光晶体的基本性质，用电光晶体构造编解码器的关键部件电光偏转器和电光开关，对系统的每个部分进行分析，用具体的地址码进行模拟。结果表明，该方法能有效实现二维光码分多址系统的编解码，并且方法简单、控制灵活、系统升级方便，能够在全光网络通信中发挥重要作用。

英文摘要：

A new encoder-decoder scheme of 2-D OCDMA （Optical Code Division Multiple Access） system is proposed. The principles of encoding-decoding and the characteristics of electro-optic crystals are discussed. The key components, electro-optic deflector and switch, were manufactured by electro-optic crystals and each part of this system was analyzed respectively. A simulation was made with 2-D OOC （optical orthogonal code）, and the results showed the effectiveness of this technique in realizing encoder-decoder. This system would play an important role in all-optical telecommunications with its simple scheme, flexible control and convenient upgrade.