Broadband adiabatic polarization rotator-splitter based on a lithium niobate on insulator platform  

作　　者：ZHAOXI CHEN JINGWEI YANG ING-HAN WONG EDWIN YUE-BUN PUN CHENG WANG 

机构地区：[1]Department of Electrical Engineering,City University of Hong Kong,Kowloon,Hong Kong,China [2]State Key Laboratory of Terahertz and Millimeter Waves,City University of Hong Kong,Kowloon,Hong Kong,China

出　　处：《Photonics Research》2021年第12期2319-2324,共6页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(61922092);Research Grants Council,University Grants Committee(City U 11210317,City U 21208219);City University of Hong Kong(9610402,9610455)。

摘　　要：Polarization rotator-splitters(PRSs)are crucial components for controlling the polarization states of light in classical and quantum communication systems.We design and experimentally demonstrate a broadband PRS based on the lithium niobate on insulator(LNOI)platform.Both the rotator and splitter sections are based on adiabatically tapered waveguide structures,and the whole device only requires a single etching step.We show efficient PRS operation over an experimentally measured bandwidth of 130 nm at telecom wavelengths,potentially as wide as 500 nm according to simulation prediction,with relatively low polarization crosstalks of~-10 d B.Our PRS is highly compatible with the design constraints and fabrication processes of common LNOI photonic devices,and it could become an important element in future LNOI photonic integrated circuits.

关 键 词：POLARIZATION waveguide LITHIUM 

分 类 号：TN252[电子电信—物理电子学] O436.3[机械工程—光学工程]