Silicon-on-Insulator (SOI) based Polarization-Exchanger using Asymmetric Directional Coupler

Abstract

We propose an silicon-on-insulator (SOI) based polarization-exchanger using bi-level-tapers and asymmetric-directional-couplers. Signal from transverse-electric (TE) polarization can be switched to transverse-magnetic (TM) polarization and vice versa. Crosstalk <= -25dB is observed in 40nm wavelength window.