阵列波导光栅插入损耗的降低

The Reduction of Insertion loss of Arrayed Waveguide Grating

阵列波导光栅 ( AWG Arrayed Waveguide Grating)是实现多通道密集波分复用( DWDM Dense Wavelength Division Multiplexing)光网络的理想器件 ,插入损耗是它的一个重要性能指标。本文介绍了多种减小 AWG插入损耗的方法 ,并在此基础上 ,分析了如何使用楔形波导结构来降低模式失配所导致的耦合损耗。这种方法可以在不增加器件制作难度的同时大大降低 AWG的插入损耗 ,并且适用于各种材料和结构的 AWG器件设计。

Arrayed waveguide grating(AWG) is a good device for the construction of multiple channels dense wavelength division multiplexing(DWDM)optical network and the insertion loss is one of its important characteristic parameters.Based on the introduction of some solutions to improve the insertion loss of AWG we analyze how to use the tapered waveguides to reduce the coupling loss caused by the field mismatch.The proposed method can considerably low the insertion loss of AWG without increasing difficulties of device processing.The design criteria can be easily applied to AWG of various materials and structures.