Sidelobes caused by polarization rotation in arrayed waveguide gratings
E Kleijn, PJ Williams, ND Whitbread… - 2011 ICO …, 2011 - ieeexplore.ieee.org
2011 ICO International Conference on Information Photonics, 2011•ieeexplore.ieee.org
… In [1] Smit reports the a number of possible sidelobe causes, among which: finite array
aperture sizes, phase errors due to fabrication imperfections and coupling between array
waveguides. Here we report on a new cause: polarization rotation in the curved waveguides of
the array. Sidelobes caused by this effect will be referred to as polarization rotation sidelobes
or ‘PR-sidelobes’ for short. To the best of the authors’ knowledge this is the first time PR-…
aperture sizes, phase errors due to fabrication imperfections and coupling between array
waveguides. Here we report on a new cause: polarization rotation in the curved waveguides of
the array. Sidelobes caused by this effect will be referred to as polarization rotation sidelobes
or ‘PR-sidelobes’ for short. To the best of the authors’ knowledge this is the first time PR-…
Polarization rotation within an Arrayed Waveguide Grating (AWG) is found to cause sidelobes in the response of the AWG. The devices in which this effect was observed are briefly discussed. Their measured responses are compared to a detailed simulation.
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