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对设计的折射率差为0.75%的16×0.8nm硅基二氧化硅阵列波导光栅(AWG),围绕插损和串扰问题,采用广角有限差分束传播方法(FD BPM)进行了数值模拟和优化。通过优化在输入波导、阵列波导的喇叭口,得到了插损为1.5dB、串扰为-48dB的AWG,优化后的指标已达到商用要求。
A 16 × 0.8nm silicon-based silicon dioxide arrayed waveguide grating (AWG) with a refractive index difference of 0.75% was designed, and its numerical simulation and optimization were carried out by using the wide-angle finite-difference beam propagation method (FD BPM) . By optimizing the input waveguide and the waveguide of the arrayed waveguide, an AWG with an insertion loss of 1.5dB and a crosstalk of -48dB has been obtained, and the optimized index has reached the commercial requirement.