10-Channel Mode (de)multiplexer with Dual Polarizations
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AbstractA dual-polarization 10-channel mode (de)multiplexer is proposed and realized with cascaded dual-core adiabatic tapers on a silicon-on-insulator (SOI) platform. The mode demultiplexer has a 2.3m-wide multimode bus waveguide, which supports six mode-channels of TE polarization and four mode-channels of TM polarization. These ten mode-channels are (de)multiplexed with five cascaded dual-core adiabatic tapers based on SOI nanowires. The widths for these dual-cores are chosen optimally according to the dispersion curves of the dual-core SOI nanowire, so that the desired highest-order modes of TE- and TM-polarizations are extracted simultaneously. These two extracted mode-channels are coupled very efficiently to the fundamental modes of TE- and TM-polarizations (TE0 and TM0) in the narrow waveguide, respectively, which are then separated by using a polarization beam splitter based on bent directional couplers. A chip consisting of a pair of 10-channel mode (de)multiplexers is fabricated and then tested with data transmission of 30Gbps/channel. The measurement results show that all TM- and TE mode-channels have low crosstalks (-15 approximate to-25dB) and low excess losses (0.2 approximate to 1.8dB) over a broad wavelength band of approximate to 90nm, which makes it WDM (wavelength-division-multiplexing)-compatible and thus suitable for high capacity on-chip optical interconnects.
All Author(s) ListDai DX, Li CL, Wang SP, Wu H, Shi YC, Wu ZH, Gao SM, Dai TG, Yu H, Tsang HK
Journal nameLaser and Photonics Reviews
Volume Number12
Issue Number1
Article number1700109
LanguagesEnglish-United Kingdom
Keywordsadiabatic taper, mode multiplexing, nanowire, polarization, silicon
Web of Science Subject CategoriesOptics;Physics, Applied;Physics, Condensed Matter;Optics;Physics

Last updated on 2021-07-05 at 00:24