K. Gallacher, R. Millar, U. Griskeviciute, Douglas J. Paul
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The design and modelling of an ultra broadband Ge-on-Si waveguide polarization rotator is presented. The polarization rotator demonstrates high extinction ratio (≥ 18.5 dB) and low insertion loss (≤ 1 dB) over the full operating range of 8 to 11 μm wavelength.