Ahmed Abu Naim R, Nelan Sean, Shi Shouyuan, Yao Peng, Mercante Andrew, Prather Dennis W
Opt Lett. 2020 Mar 1;45(5):1112-1115. doi: 10.1364/OL.381892.
A low voltage operation electro-optic modulator is critical for applications ranging from optical communications to an analog photonic link. This paper reports a hybrid silicon nitride and lithium niobate electro-optic Mach-Zehnder modulator that employs 3 dB multimode interference couplers for splitting and combining light. The presented amplitude modulator with an interaction region length of 2.4 cm demonstrates a DC half-wave voltage of only 0.875 V, which corresponds to a modulation efficiency per unit length of 2.11 V cm. The power extinction ratio of the fabricated device is approximately 30 dB, and the on-chip optical loss is about 5.4 dB.
低电压操作电光调制器对于从光通信到模拟光子链路等一系列应用至关重要。本文报道了一种混合氮化硅和铌酸锂电光马赫-曾德尔调制器，该调制器采用3 dB多模干涉耦合器来分光和合光。所展示的具有2.4 cm相互作用区域长度的幅度调制器，其直流半波电压仅为0.875 V，对应每单位长度的调制效率为2.11 V/cm。所制造器件的功率消光比约为30 dB，片上光损耗约为5.4 dB。
