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Opt Lett. 2013 Apr 15;38(8):1227-9. doi: 10.1364/OL.38.001227.

Wideband polarization splitter and rotator with large fabrication tolerance and simple fabrication process.

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  • 1Department of Photonics Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark.


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 2×2 multimode interferometer and can be simply fabricated in a single lithography and etching step. A low insertion loss (<2.5 dB with minimum insertion loss of 0.6 dB) and a low polarization crosstalk (<-12 dB) over a wide operation bandwidth (~100 nm) with a large fabrication tolerance (>50 nm) are experimentally demonstrated.

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