传统的不对称的 Mach-Zehnder 干涉仪( AMZI )上的分析基于方向性的 couplers ( DC )显示出的二 3 dB ,那由产生阶段的 coupler ( PGC )由增加一个另外的非线性的阶段产生了到 AMZI 的原来的阶段差别的光过滤器,它的非周期性的频率反应能被修改,并且一个严格地周期的系列能被获得。用在 AMZI 区域前后的二 PGC 的 AMZI 过滤器的新奇结构被建议。与 20 nm 的需要的免费光谱范围(FSR ) ,设备的设计和优化作为缓冲区作为核心和 PMMA-GMA 用聚合物 SU-8 被执行。尽管插入损失(IL ) 变得比传统的 AMZI 过滤器的大, FSR 作为 20 nm 的期望的时期将近一致。
The analysis on the traditional asymmetric Mach-Zehnder interferometer (AMZI) optical filter based on two 3 dB directional couplers (DCs) shows that by adding an additional nonlinear phase generated by phase-generating coupler (PGC) to the original phase difference of the AMZI, its non-periodic frequency response can be modified, and a strictly periodic spectrum can be obtained. A novel structure of the AMZI filter using two PGCs before and after the AMZI region is proposed. With the needed free spectrum range (FSR) of 20 nm, the design and optimization of the device are performed using polymer SU-8 as the core and PMMA-GMA as the buffer. Though the insertion loss (IL) gets larger than that of the traditional AMZI filter, the FSR is nearly uniform as the expected period of 20 nm.