光格型FIR奇偶交错滤波器设计  

Design of optical lattice FIR interleaver

作　　者：张瑞峰[1] 胡智勇[1] 葛春风[1] 王书慧[1] 李世忱[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院教育部光电技术重点实验室,天津300072

出　　处：《量子电子学报》2005年第5期799-805,共7页Chinese Journal of Quantum Electronics

摘　　要：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恪型阵列具体参数(单位时延△τ和耦合角θk)的算法编写了相应的计算程序,讨沦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。在此基础上没计了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0dB,隔离度可以达到50dB。Cascaded coupler interleaver using optical lattice FIR filter model in z-transform is theoretically analyzed. Programming based on the algorithm to resolve optical lattice array concrete parameter （unit time delay △T and coupler angle θk） for objective function, corresponding relationship between z domain low-pass filter with about 0.5 boundary normalized frequency for pass band and optical domain interleaver are discussed. Five kinds of filters （from a to e） are designed, with rectangle-like amplitude frequency response characteristic curve, fiat top pass band, nearly 0 dB ripples, and isolation up to 50 dB.

关 键 词：光通信 奇偶交错滤波器 光格型FIR滤波器 矩形度 平顶频响 

分 类 号：TN929.11[电子电信—通信与信息系统] TN253[电子电信—信息与通信工程]