Study On Athermal Arrayed Waveguide Grating Based On Monolithic Integrating Multiplexer With Demultiplexer

Dense wavelength division multiplexing(DWDM)is a low cost and large capacity communication capacity expansion method,which has been widely used in the existing communication networks.In the coming 5G era,dense wavelength division multiplexing technology has also become a solution of mobile communication pretransmission network.The arrayed waveguide grating,as a key device for dividing and combining waves in the dense wavelength division multiplexing system,can improve the utilization rate of network resources,and is more cost-effective for communication between dense channels,so it has attracted wide attention.However,the WDM system generally includes two modules:multiplexing and demultiplexing.These two modules are separated in the widely used WDM system,which greatly increases the size of the WDM module.On the other hand,array waveguide grating chips have always adopted thermal solutions,which not only increase the energy consumption of the system,but also limit their application sites.In order to solve the existing problems,this thesis proposes a monolithic integrated multiplexing and demultiplexing array waveguide grating,and design a new type of temperature compensation structure based on the chip.It not only makes the wavelength division module size decrease 61% of the regular modules,but also avoid the limitation of hot scheme brings.More importantly,it has realized the amount of wavelength drift is within ±25pm only in the temperature range of-40? to85?.The main content of the thesis includes:(1)An array waveguide gratings structure with monolithic integrated multiplexing and demultiplexing is proposed based on the basic structure of array waveguide gratings,and its basic parameters are designed to realize wavelength multiplexing and demultiplexing.(2)A novel non-thermal compensation scheme is proposed and analyzed based on the single-chip integrated multiplexing and demultiplexing array waveguidegrating structure.The simulation results show that the compensation structure can meet the requirements of wavelength shift of the integrated module in the industrial temperature range.(3)The preparation process of the module was summarized,and the temperature characteristic test system and optical performance testing system was used to test the module.The test results show that the module can operate in-40? to 85? the industrial grade temperature range with only + /-25 PM wavelength drift,and the optical performance is in line with conventional module.