Abstract

We propose and demonstrate a polarization splitter and rotator (PSR) built on a silicon-on-insulator platform. The PSR is constructed with a tapered waveguide followed by a $2\times 2$ multimode interferometer and can be simply fabricated in a single lithography and etching step. A low insertion loss ($<2.5\mathrm{dB}$ with minimum insertion loss of 0.6 dB) and a low polarization crosstalk ($<-12\mathrm{dB}$) over a wide operation bandwidth ($\sim 100\mathrm{nm}$) with a large fabrication tolerance ($>50\mathrm{nm}$) are experimentally demonstrated.

© 2013 Optical Society of America

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