High-Order Mode Rotator on the SOI Integrated Platform

作者：Wang, Jiamin; Zhao, Donghui; Xu, Jing^*; Xue, Xun; Zhang, Xinliang

来源：IEEE Photonics Journal, 2016, 8(2): 6500308.

DOI：10.1109/JPHOT.2016.2542840

• Silicon nanophotonics
• waveguide devices
• optical interconnects

A high-order mode rotator based on a silicon-on-insulator strip waveguide with asymmetrical cross section is proposed and optimized to rotate the spatial distribution of the E-21 mode by 90 degrees into that of the E-12 mode. The subscripts i and j of the mode E-ij correspond to the number of lobes in the intensity distribution of the mode along the horizontal and vertical axes, respectively. The mode conversion efficiency and the corresponding length of the mode rotator device are presented as a function of design parameters for both the transverse magnetic (TM) and transverse electric (TE) polarizations. The fabrication tolerance of the structure is also analyzed. We further present simulation results of a two-mode multiplexing system based on E-21 and E-12 showing a mode extinction ratio exceeding 15 dB over a wide wavelength range of 100 nm.

• 出版日期2016-4
• 单位华中科技大学