摘要
We report a waveguide crossing based on a multimode-interference （MMI） structure for metal-insulator-metal （MIM） waveguides. The MMI-based crossing comprises two orthogonal intersecting MMI waveguides that are connected to the single-mode input/output waveguide symmetrically. Single self-images are formed at the cross- ing center and output plane of the MMI waveguide, thereby mitigating the crosstalk and improving the through- put. The characteristics of the proposed MMI-based crossing are investigated with the finite element method of Comsol Multiphysics. The results show that the throughput reaches -1.8 dB and the crosstalk is less than -46 dB at the wavelength of 1550 nm.
We report a waveguide crossing based on a multimode-interference （MMI） structure for metal-insulator-metal （MIM） waveguides. The MMI-based crossing comprises two orthogonal intersecting MMI waveguides that are connected to the single-mode input/output waveguide symmetrically. Single self-images are formed at the cross- ing center and output plane of the MMI waveguide, thereby mitigating the crosstalk and improving the through- put. The characteristics of the proposed MMI-based crossing are investigated with the finite element method of Comsol Multiphysics. The results show that the throughput reaches -1.8 dB and the crosstalk is less than -46 dB at the wavelength of 1550 nm.
基金
supported by the National Natural Science Foundation of China(Nos.11374041 and11574035)
the Fund of State Key Laboratory of Information Photonics and Optical Communications(Beijing University of Posts and Telecommunications),China
