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基于码分复用-正交频分复用(CDM-OFDM)和光残留边带调制,设计并实验演示了一种直接探测的光通信系统.结果显示,在采用双边带调制时,对比普通OFDM信号,CDM-OFDM信号具有更大的色散容忍度.通过采用16-QAM调制、偏振复用(PDM)以及光残留边带滤波,速率为100 Gb/s的PDM CDM-OFDM信号在标准单模光纤中成功传输了24.4 km.同时研究了CDM-OFDM信号的编码增益.仿真和实验首次证明,CDM-OFDM更适用于短距离光通信系统中.
Based on code division multiplexing - Orthogonal Frequency Division Multiplexing (CDM-OFDM) and optical residual sideband modulation, a direct probing optical communication system is designed and experimentally demonstrated. The results show that when using double-sideband modulation, Signal, the CDM-OFDM signal has a greater dispersion tolerance.PDM CDM-OFDM signals at a rate of 100 Gb / s using 16-QAM modulation, polarization multiplexing (PDM) and optical residual sideband filtering operate in standard single mode The transmission gain of CDM-OFDM signal is 24.4 km, and the simulation and experiment prove for the first time that CDM-OFDM is more suitable for short-distance optical communication system.