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随着密集波分复用(DWDM)技术的不断发展,光学梳状滤波器(Interleaver)从原始功能的两路输出谱带宽相等的等带宽器件向不等带宽器件发展,以灵活应用于复杂网络的分插复用及不同网络平台间的过渡等。迈克耳孙Gires-Tournois干涉仪(MGTI)型interleaver具有结构紧凑、成本低、参数简单易调节、性能优异等特点,是实现interleaver的一个典型方案。从严格的数学角度推导了判定MGTI型interleaver周期的理论依据,并给出了几个具体的MGTI结构周期的判定实例。任何参数结构的MGTI型interleaver,当GT腔镜面反射率发生变化时,等带宽与不等带宽MGTI型interleaver的奇、偶两路输出光谱光强相交点处的特性不同。具体给出了该不同特性的实例。这些结论可用来指导设计满足不同周期和带宽要求的MGTI型interleaver,对设计特种光学干涉滤波器也可起到一定的指导性作用。
With the continuous development of Dense Wavelength Division Multiplexing (DWDM) technology, the optical interleaver (Interleaver) has been developed from an equal-bandwidth equal-bandwidth equal-bandwidth device of the original two-output spectrum to an unequal bandwidth device for flexible application in a complex network Add and drop multiplexing and the transition between different network platforms. Mike Ershen Gires-Tournois Interferometer (MGTI) Interleaver has the advantages of compact structure, low cost, simple and easy parameter adjustment and excellent performance. It is a typical scheme to realize interleaver. The theoretical basis for judging the period of MGTI interleaver is deduced from a strict mathematical point of view. Some concrete examples of judgment of MGTI structure period are given. MGTI-type interleaver with any parameter structure has different characteristics at the intersection of odd and even output spectral intensities of MGTI type interleaver when the reflectivity of the GT cavity is changed. Specific examples of this different feature are given. These conclusions can be used to guide the design MGTI-type interleaver to meet different cycle and bandwidth requirements, which can also play a guiding role in the design of special optical interference filter.