In the second part, the basic principle of theAWG is discussed, then the grating equation of the AWG as well as theangular dispersion, free spectral range (FSR) and frequency response arededuced in theory.

• 因此，许多研究者开始研究硅基聚合物 AWG 器件，这种器件具有价格便宜、工艺简单、折射率调整容易、透明性好、偏振不灵敏以及热稳定性好等优点，使其在与无机材料 AWG 器件的竞争中处于有利的地位。