title: On-chip multiplexing conversion between wavelength division multiplexing-polarization division multiplexing and wavelength division multiplexing-mode division multiplexing.
abstract: A compact silicon-on-insulator device used for conversions between polarization division multiplexing (PDM) and mode division multiplexing (MDM) signals is proposed and experimentally demonstrated by utilizing a structure combining the improved two-dimensional grating coupler and two-mode multiplexer. The detailed design of the proposed device is presented and the results show the extinction ratio of 16 and 20 dB for X- and Y-pol input, respectively. The processing of 40  Gb/s signal is achieved within the C-band with good performance. The proposed converter is capable of handling multiple wavelengths in wavelength division multiplexing (WDM) networks, enabling the conversions between WDM-PDM and WDM-MDM, which is promising to further increase the throughput at the network interface.
authors.forename: Mengyuan
authors.initials: M
authors.lastname: Ye
authors.forename: Yu
authors.initials: Y
authors.lastname: Yu
authors.forename: Jinghui
authors.initials: J
authors.lastname: Zou
authors.forename: Weili
authors.initials: W
authors.lastname: Yang
authors.forename: Xinliang
authors.initials: X
authors.lastname: Zhang