Electro-optic Combination Coherent Communication System Based On OCDMA Theory

With the explosive growth of data and the continuous expansion of the network scale, the spectrum resource problem in the network is becoming more and more serious, which hinders the development of the Internet. Aiming at the problem that the spectrum utilization of the optical code division multiple access (OCDMA) system, we give a possible strategy for communication scheme, analyze them, and derive expressions for coding and decoding states. We design an experimental system with the data-rate of 5Gbit/s, the distance of 620km. The results indicate the high recovery accuracy of the user data. Furthermore, we compare coherent and incoherent systems in terms of transmission distance and bit error rate (BER). The simulation results show that the scheme we proposed can transmit longer distances and the BER is lower than incoherent systems.