Mikkelsen J C, Bois A, Lordello T, Mahgerefteh D, Menezo S, Poon J K S
Opt Express. 2018 Nov 12;26(23):30076-30084. doi: 10.1364/OE.26.030076.
Polarization-insensitive silicon nitride (SiN) 4-channel wavelength (de)multiplexers based on Mach-Zehnder interferometer lattice filters for coarse wavelength division multiplexing (CWDM) in the O-band are demonstrated in a SiN-on-silicon photonic platform. For the best-performing device, the insertion loss was < 2.8 dB, the inter-channel crosstalk was < -11.5 dB for a polarization scrambled input, and the passband shift between the orthogonal polarizations was < 1.5 nm. Across the 200mm wafer, the die-averaged insertion loss and maximum crosstalk were 3.1 dB and -10.6 dB, respectively. The higher-than-expected crosstalk was due to dimensional variations. This work shows the potential of SiN photonic circuits for CWDM without polarization diversity.
基于马赫-曾德尔干涉仪晶格滤波器的偏振不敏感氮化硅（SiN）四通道波长（解）复用器，用于O波段的粗波分复用（CWDM），已在硅基氮化硅光子平台上得到验证。对于性能最佳的器件，插入损耗小于2.8 dB，对于偏振扰动脉冲输入，通道间串扰小于-11.5 dB，正交偏振之间的通带偏移小于1.5 nm。在整个200mm晶圆上，芯片平均插入损耗和最大串扰分别为3.1 dB和-10.6 dB。串扰高于预期是由于尺寸变化所致。这项工作展示了无偏振分集的CWDM中SiN光子电路的潜力。
