University of Tabriz Tabriz Journal of Electrical Engineering 2008-7799 49 2 2019 07 23 Miniaturization and bandwidth enhancement of Mach-Zehnder polarization splitter using non-uniform multimode interferometers Miniaturization and bandwidth enhancement of Mach-Zehnder polarization splitter using non-uniform multimode interferometers 735 745 9131 FA Sh. Fargadi Faculty of Electrical and Computer Engineering, University of Shiraz, Shiraz, Iran M. Miri Faculty of Electrical and Computer Engineering, University of Shiraz, Shiraz, Iran M. H. Sheikhi Faculty of Electrical and Computer Engineering, University of Shiraz, Shiraz, Iran Journal Article 2017 07 01 The design of a compact wideband polarization splitter based on Mach-Zehnder interferometer (MZI) with non-uniform multi-mode interferometer (MMI) couplers is presented in this manuscript. The polarization splitting in the proposed structure stems from polarization dependent dispersion of non-uniform silicon-on-insulator (SOI) waveguides used as the MZI arms. The use of non-uniform MMI couplers increases the bandwidth of the structure while reduces its sensitivity to fabrication imperfections. Our simulation results show the very low insertion loss of 0.8dB, and high polarization extinction ratios of 10dB and 15dB for transverse magnetic and transverse electric field polarization, respectively, in the ultra-wide bandwidth of 100nm (1500nm-1600nm). The proposed polarization splitter has wider bandwidth and larger fabrication tolerance compared to the directional coupler based splitter. In addition total footprint is 3.86×60mm² which is much smaller than MZI based splitters. The design of a compact wideband polarization splitter based on Mach-Zehnder interferometer (MZI) with non-uniform multi-mode interferometer (MMI) couplers is presented in this manuscript. The polarization splitting in the proposed structure stems from polarization dependent dispersion of non-uniform silicon-on-insulator (SOI) waveguides used as the MZI arms. The use of non-uniform MMI couplers increases the bandwidth of the structure while reduces its sensitivity to fabrication imperfections. Our simulation results show the very low insertion loss of 0.8dB, and high polarization extinction ratios of 10dB and 15dB for transverse magnetic and transverse electric field polarization, respectively, in the ultra-wide bandwidth of 100nm (1500nm-1600nm). The proposed polarization splitter has wider bandwidth and larger fabrication tolerance compared to the directional coupler based splitter. In addition total footprint is 3.86×60mm² which is much smaller than MZI based splitters. https://tjee.tabrizu.ac.ir/article_9131_7c3d8bfb4445d7e6dab1b7d4a5257d81.pdf