如图3所示为IBM的Yurii A. Vlasov等人制作的1分8路MZI级联型滤波器,左右分别为显微镜视图和测试曲线。测试结果表明该器件具有良好的平顶响应,且损耗和串扰分别为1.6dB、-18dB~-20dB[1]。
图3 MZI级联结构的显微镜视图和测试曲线
参考文献
[1] Folkert Horst, William M.J. Green, Solomon Assefa, Steven M. Shank, Yurii A. Vlasov, and Bert Jan Offrein, " Cascaded Mach-Zehnder wavelength filters in silicon photonics for low loss and flat pass-band WDM (de-)multiplexing," Opt. Express. 21(10), 11652–11658 (2013).