Higher-order-mode assisted silicon-on-insulator 90 degree polarization rotator.
We propose and analyze a 90 degrees polarization rotator based on wave coupling through an intermediate, multimode, axially uniform waveguide. The coupling efficiency of the x- and y-polarized fundamental modes between the horizontal and vertical rectangular waveguides is remarkably enhanced with the help of the TE(01) mode in the multimode waveguide. The polarization rotator has a very short (21-microm) conversion length with a 17.22 dB extinction ratio. It also exhibits a 68-nm bandwidth for polarization conversion efficiency above 90%.
Yue
Yang
Y
Department of Electrical Engineering, University of Southern California, Los Angeles, CA 90089, USA. yyue@usc.edu
Zhang
Lin
L
Song
Muping
M
Beausoleil
Raymond G
RG
Willner
Alan E
AE