Research And Design Of A Full Network Wavelength Synchronous UDWDM-PON Solution Based On Injection Locking

As Chinese network powerful nation strategy develops constantly over the last few years,users' high symmetrical bandwidth requirements for “the last mile” access network arise.The sinking market has driven the rapid growth of the Internet scale in small,medium-sized cities and rural areas.Thus,the access system not only needs to ensure the capacity for exponential growth number of users' access,but also needs to controls the cost of construction and maintenance.Therefore,ultra-dense wavelength division multiplexing passive optical network(UDWDM-PON)with super-largecapacity potential has become a hotspot in the research area and application of access networks.To adapt the demands for the next-generation access networks,this thesis proposes and demonstrates a full-network wavelength-synchronous UDWDM-PON solution based on injection locking,which solves the problems of wavelength stability at small wavelength intervals,colorless ONUs and high-performance low-cost data reception and etc.Apart from those,double users 500 Mbps OOK signal up / down symmetrical transmission system experiment is achieved.Specific research contents:1)Injected power requirement for stability of injection locking,detuning frequency and etc.are clarified through the principle analysis and simulation of the optical injection-locked DFB laser.Linewidth of the DFB laser that meet the system requirements are tested and feasibility of injection locking is verified for solution in this thesis;2)Based on full-network wavelength synchronization principle,transmitter and receiver are designed and channel stability is improved through wavelength automatic locking and tracking algorithm;3)By observing the oscillation of wavelength in the system channel through experiment,500 Mbps symmetric data transmission for single and double users with only 5GHz channel spacing system is completed,system transmission performance is further analysed.The system architecture is designed and builted in this thesis is based on the optical injection locking technology.All optical wavelengths in the network remain relatively stable with the optical frequency comb.In the true sense,a full-network synchronous UWDWM-PON is built.Low-cost,high-quality optical access networks provide new ideas.