As the key device of a DWDM system,Etching Diffraction Grating (EDG) is one of the most potential types of planar waveguide DWDM devices.

• 作为波分复用中最关键的器件 ；蚀刻衍射光栅 (EDG)是平面波导密集波分复用器件中很有发展潜力的一种 .