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分析了两级串联马赫 曾德尔(Mach Zehnder)干涉型奇偶交错滤波器(Interleaver)的透过率函数。理论上采用梯形波近似的方法,利用傅里叶级数展开的方法选取适当的参数,可得到输出波形通带平坦,阻带加宽的滤波器,其输出稳定性和隔离度均得到了提高。通过实验所得的结果与理论相吻合。
The transmissibility function of the two-stage Mach Zehnder interferometric parity interleaved filter (Interleaver) is analyzed. In theory, the method of trapezoidal wave approximation and the Fourier series expansion method are used to select the appropriate parameters to obtain a filter with flat passband and widened stopband, and the output stability and isolation are improved . The results obtained through experiments are consistent with the theory.