基于阵列波导光栅的灵活多TWDM-PON系统设计OA

[Objective]To address the issues of load imbalance,low resource efficiency,the"tidal effect"of periodic fluctuations in traffic geography and time domain distribution in current time-wavelength division networks,this paper proposes a flexible Multi-Time Wavelength Division Multiplexing(TWDM)-Passive Optical Network(PON)scheme based on Arrayed Waveguide Grating(AWG).[Methods]This system combines fixed and tunable wavelength lasers,leveraging the routing characteristics of AWG to dynamically adjust the allocated bandwidth for each PON based on real-time network load,enabling flexible wavelength resource allocation while maintaining the passivity of the optical distribution network.[Results]The system achieves wavelength sharing and efficient resource allocation,catering to diverse bandwidth demands of different users.Simulation results show that with a single wavelength transmission rate of 10 Gbit/s,the downlink transmission power budget exceeds 34 dB,and the system split ratio can reach 1∶512 at a maximum transmission distance of 30 km.It is indicated that the design scheme proposed in this pa-per can not only effectively improve resource utilization and optimize network transmission performance,but also take into account the economy and reliability of system deployment.[Conclusion]It can adapt to the diverse high-speed service requirements such as 4K/8K ultra-high-definition video and cloud computing,which provides a feasible technical path for the next-generation optical access network to address the problem of uneven traffic distribution with good practical application value.