High-Order Mode Rotator on the SOI Integrated Platform

High-Order Mode Rotator on the SOI Integrated Platform

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 <inline-formula> <tex-math notation="LaTeX">$E_{21}$</tex-math></inline-formula> mode by 90&...

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Bibliographic Details
Main Authors: Jiamin Wang, Donghui Zhao, Jing Xu, Xun Xue, Xinliang Zhang
Format: Article
Language:English
Published: IEEE 2016-01-01
Series:IEEE Photonics Journal
Subjects:
Silicon nanophotonics
Waveguide devices
Optical interconnects
Online Access:https://ieeexplore.ieee.org/document/7434561/
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Summary: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 <inline-formula> <tex-math notation="LaTeX">$E_{21}$</tex-math></inline-formula> mode by 90&#x00B0; into that of the <inline-formula> <tex-math notation="LaTeX">$E_{12}$</tex-math></inline-formula> mode. The subscripts <inline-formula> <tex-math notation="LaTeX">$i$</tex-math></inline-formula> and <inline-formula> <tex-math notation="LaTeX">$j$</tex-math></inline-formula> of the mode <inline-formula> <tex-math notation="LaTeX">$E_{ij}$</tex-math></inline-formula> 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 <inline-formula> <tex-math notation="LaTeX">$E_{21}$</tex-math></inline-formula> and <inline-formula> <tex-math notation="LaTeX">$E_{12}$</tex-math></inline-formula> showing a mode extinction ratio exceeding 15 dB over a wide wavelength range of 100 nm.
ISSN:1943-0655

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