The early OCDMA network proposals were based on coded sequences of noncoherent pulses.The used optical orthogonal codes (OOCs) generally have poorer correlation properties and limited code size.

• 早期提出的光分码多工网路主要是针对经过编码后的非同调光波来设计，所使用的光正交码的互相关函数很大，可选择的正交码种类不多，正交码的数目也不多。