Analyses And Optimization Of Arrayed Waveguide Grating Multiplexer/demultiplexer

Wavelength Division Multiplexing (WDM) technology can achieve a large-capacity communication and multi-functional service, because of which, WDM has great potential in the application of network services, and has become a hot research field of optical fiber communication. Optical add-drop multiplexer (OADM) processes signals as the key device in the core network and MAN, achieving signal’s download and upload. The OADM that based on the array waveguide grating (AWG) is a new drop multiplexing structure, which has the advantages of high stability, reliability and good value for money. Because of these advantages, the OADM that based on AWG becomes the preferred object to build dense wavelength division multiplexing (DWDM) system, which attracts more and more attention and study.AWG that based on WDM technology has caused widespread concern. The main work of this paper is the AWG’s computer-aided design and analyses. First, the paper analyzes the theory of AWG, and makes the derivation according the grating equation to get the formula of the main parameters. Second, the paper uses the WDM_Phasar, which based on BPM’s algorithm, to design a32x32AWG, and makes simulation of the AWG. Third, researches some performance of AWG, such as crosstalk, diffraction loss, and takes a optimal design, by the simulation.On the basis of optimal design for AWG, the paper makes a system simulation of OADM that based on AWG. The paper designs a four-channel OADM, which is composed by two4x4AWGs and four2x2TOSs, and simulates the OADM on the OptiSystem. The four channel-signals’ download and upload is achieved.