Silicon-on-insulator polarization splitter using two horizontally slotted waveguides

Abstract

We propose and analyze a short-length silicon-on-insulator polarization splitter using two horizontally slotted silicon waveguides. A polarization splitter with a $46.7\mu \text{m}$ length and a 22 dB extinction ratio (ER) is achieved. Around 1550 nm, it also exhibits an 18 nm bandwidth for $\text{ER}>20\text{\hspace{0.17em} dB}$. The effects of the slot thickness, the waveguide spacing, and the refractive index of the slot on the splitting length and ER are investigated.

© 2010 Optical Society of America

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