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Focusing Polarization Diversity Grating Couplers in Silicon-on-Insulator

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6 Author(s)
Van Laere, F. ; Dept. of Inf. Technol. (INTEC), Ghent Univ., Ghent ; Bogaerts, W. ; Dumon, P. ; Roelkens, G.
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We report on compact focusing polarization diversity grating couplers in silicon-on-insulator, which can be used to overcome the polarization dependence of nanophotonic integrated circuits. The minimum fiber-to-fiber polarization dependent loss is 0.4 dB and the focusing grating couplers are as performant as standard 2-D-grating couplers without focusing. In addition, the focusing property of the gratings results in an 8-fold length reduction of the coupling structure as compared to standard nonfocusing 2-D-grating versions.

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Lightwave Technology, Journal of  (Volume:27 ,  Issue: 5 )