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给出了更为合理的阵列波导光栅(AWG)的设计原则。在设计时兼顾了输出谱的非均匀性Lu和输出通道数N的要求,克服了设计中可能引起通道数N丢失和不考虑输出谱非均匀性Lu的缺点。用该方法设计了折射率差为0 75%和16×0 8nm的硅基二氧化硅AWG。采用广角有限差分束传播方法(FD BPM)对所设计的AWG进行了输出谱的模拟,得到了插损为 1.5dB、串扰为 48dB、通道非均匀性约为1dB的AWG,设计指标达到了商用要求。
A more reasonable design principle of arrayed waveguide grating (AWG) is given. In the design, both the non-uniformity of the output spectrum Lu and the number of output channels N are taken into account, which overcomes the shortcomings of the design which may cause the loss of the number of channels N and the non-uniformity of the output spectrum Lu. Silicon-based silica AWG with refractive index difference of 0 75% and 16 × 0 8 nm was designed by this method. The output spectrum of the designed AWG was simulated by the wide-angle finite-difference beam propagation method (FD BPM), and the AWG with insertion loss of 1.5dB, crosstalk of 48dB and channel non-uniformity of about 1dB was obtained, and the design index reached commercial Claim.