光纤环对非平衡马赫曾德尔干涉仪型波长交错滤波器性能的改善

波长交错滤波器是一种类似于梳状滤波器的无源光子器件，在密集波分复用系统中可以起到复用和解复用器件的作用。如果将一光纤圈加入光纤溶锥型非平衡马赫－曾德尔干涉仪型波长交错滤波器系统中，它的滤波性能将有所改善。改进后的梳状滤波器的透射率形态近似于方波，讨论了新系统的结构和参数选取。

Improvement of the Capability of Nonsymmetrical Mach-Zehnder Interferometric Interleaver Using Fiber Loop

An interleaver, which enables dense wavelength division multiplexed (DWDM) systems, is one type of passive photonic components used as a comb pattern wavelength filter. By adding one fiber loop to a fused fiber nonsymmetrical Mach Zehnder interferometer, a novel structure of interleaver is suggested, which achieves a uniform flattop spectral response and provide more performances of wavelength discrimination and filtering. The structure of the new system and the choosing of parameters are also discussed.