Chen Kaixuan, Wang Siya, Chen Sitao, Wang Shipeng, Zhang Chenzhao, Dai Daoxin, Liu Liu
Opt Lett. 2015 Oct 15;40(20):4655-8. doi: 10.1364/OL.40.004655.
A silicon mode and polarization-division multiplexing scheme based on a densely packed waveguide array structured as a bus waveguide is introduced. A short adiabatic taper is adopted for (de)multiplexing. Such a structure shows theoretical insertion losses that are <0.05 dB and crosstalk that is <-20 dB over a wide wavelength band for all five supported modes. The structures for (de)multiplexing are fabricated and characterized experimentally. A device, which consists of a multiplexer, a 50-μm-long straight-bus waveguide, and a demultiplexer, exhibits insertion losses that are <0.6 dB and crosstalk that is <-15 dB over an 80 nm wavelength band. The demonstrated (de)multiplexer has a total length of 60 μm, and the bus waveguide has an effective width of 1.58 μm.
介绍了一种基于密集排列的波导阵列（结构为总线波导）的硅模式和偏振分复用方案。采用短绝热锥形结构进行复用和解复用。这种结构在所有五个支持模式的宽波长范围内，理论插入损耗小于0.05 dB，串扰小于 -20 dB。制作了复用和解复用结构并进行了实验表征。一个由复用器、50μm长的直总线波导和解复用器组成的器件，在80nm波长范围内，插入损耗小于0.6 dB，串扰小于 -15 dB。所展示的复用器/解复用器总长度为60μm，总线波导的有效宽度为1.58μm。
