The basic model of planar waveguide gratings in reconfigurable optical add-drop multiplexer (ROADM) is presented.The characterization of the materials used in planar light wave circuit is discussed.

• 摘要建立了用于可重构上下路复用器(ROADM)中的平面波导光栅的基本模型，讨论了目前制备平面波导器件的主要材料及其特性。