Arrayed-waveguide Gratings And Thermo-optic Switch Electric Circuit Module For WDM Systems

Wavelength division multiplexing(WDM)systems play an important role in the construction of modern optical fiber communication network with high capacity,high speed and high quality.WDM systems are divided into dense wavelength division multiplexing system(DWDM)for long-distance transmission applications and coarse wavelength division multiplexing system(CWDM)for short-distance applications.As a wavelength division multiplexer/demultiplexer,arrayed-waveguide grating(AWG)plays an important role in the WDM systems.AWG can be integrated with thermo-optic switches on the same chip to build reconfigurable optical add/drop multiplexers(ROADMs),which can upload/download information at a network node.This thesis studies the designing,testing and packing methods of AWG.Firstly,it introduces the process of designing the AWG which is used in the CWDM system.Subsequently,the testing procedure and testing devices of integrated optical waveguide device are introduced and then show the test result of the waveguide loss and spectral response of AWG.Finally,it introduces the package flow and method of AWG,and the spectral response of the final package is given.After that,this thesis researches the driving and control circuits of thermo-optic switches on ROADM.First of all,it introduces the overall circuit design scheme based on the basic theory of analog and digital electricity.Then it introduces the design principle of the driving circuit and control circuit.Finally,the thermo-optic switch device is used to test the function of the overall circuit.