多路复用器
插入损耗
物理
通带
高斯分布
光学
通道间距
多路复用
串扰
功率分配器和定向耦合器
光学滤波器
带宽(计算)
波分复用
材料科学
带通滤波器
波长
电信
计算机科学
量子力学
作者
Nannan Ning,Xiaofei Wang,Hui Yu,Qikai Huang,Jianyi Yang,Yuehai Wang
出处
期刊:IEEE Photonics Journal
日期:2022-04-01
卷期号:14 (2): 1-5
被引量:5
标识
DOI:10.1109/jphot.2022.3149320
摘要
Based on cascaded Mach-Zehnder interferometer (MZI) lattice filters, we demonstrate and compare silicon O-band 8-channel (de-)multiplexers with flat and Gaussian-like passbands for the 400 GBASE-LR8 norm. The 1×8 (de-)multiplexer with flat passbands exhibit insertion loss less than 2.5 dB, channel crosstalk lower than −11 dB, and 3 dB bandwidths of ∼3.9 nm. In contrast, the maximum insertion loss, the worst channel crosstalk, and 3 dB bandwidths of the 1×8 (de-)multiplexer with Gaussian-like passbands are 1.1 dB, −13 dB, and ∼2.9 nm, respectively. The comparison result indicates that the latter is more advisable choice. A theoretical calculation based on measured coupling ratios of stand-along directional couplers (DC) indicates that the performance deteriorations of practical filtering curves are mainly caused by dispersions and fabrication errors of the DCs.
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