Open AccessEfficient silicon polarization rotator based on mode-hybridization in a double-stair waveguide
Author(s) -
Anbang Xie,
Linjie Zhou,
Jianping Chen,
Xinwan Li
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.003960
Subject(s) - optics , extinction ratio , materials science , silicon , polarization (electrochemistry) , fabrication , waveguide , polarization rotator , finite difference time domain method , silicon photonics , wavelength , optoelectronics , physics , birefringence , medicine , chemistry , alternative medicine , pathology
We present a compact silicon polarization rotator (PR) based on mode-hybridization by breaking the cross-sectional symmetry of a double-stair waveguide. The device fabrication is fully compatible with the commonly used silicon photonics processes with no extra masks required. The dependence of device performance on the double-stair waveguide dimensions is investigated using FDTD simulations. Characterizations of the fabricated devices reveal that the 23-μm-long PR exhibits a polarization extinction ratio (PER) of >17 dB in the wavelength range of 1500-1540 nm. The maximum PER exceeds 30 dB at 1518 nm.