非对称型波长交错滤波器的设计

Design of Asymmetric Interleaver Filter

提出了由2个3x3和1个2x2单模光纤耦合器级联组成的全光纤马赫-曾德尔干涉仪型波长交错滤波器,给出了基本结构,运用光纤传输理论和矩阵理论,得到该器件的输出表达式,并对其输出特性进行了分析.分析结果表明:当组成滤波器的3个耦合器的分光比和光纤干涉臂之差取一些定值时,可以使滤波器产生性能良好的非对称的梳状输出谱图.这种滤波器在10 Gb/s向10 Gb/s+40 Gb/s升级过程中作为复用/解复用器具有很大优势.

An all-fiber interleaver filter of cascaded M-Z interferometer using two 3x3 and a 2x2 fiber couplers with almost rectangular wavelength response is developed by using a new configuration.The output expression is established and described by using the principle of fiber transmission and the matrix transfer function.It is theoretically confirmed that the asymmetric output curves can be achieved when the length difference of interference arms and coupling ratios of the couplers are given by a certain value in order.The new kind of interleaver filter has more advantages as multiplexer or demultiplexer during upgrade from 10Gb/s to 10Gb/s plus 40Gb/s.