用光格型有限冲激响应(FIR)滤波器模型在z变换域对耦合器级联形式的奇偶交错滤波器进行了理论分析,根据由目标滤波函数求解光格型阵列具体参数(单位时延△τ和耦合角θk)的算法编写了相应的计算程序,讨论了通带和阻带边界归一化频率位于0.5附近的z域低通滤波器和光域奇偶交错滤波器的对应关系.在此基础上设计了a～e五种滤波器,其幅频响应特性曲线类似矩形,通带顶部平坦、纹波接近于0 dB,隔离度可以达到50 dB.
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