Focusing Polarization Diversity Grating Couplers in Silicon-on-Insulator |
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| Authors: | Van Laere F Bogaerts W Dumon P Roelkens G Van Thourhout D Baets R |
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| Affiliation: | Dept. of Inf. Technol. (INTEC), Ghent Univ., Ghent; |
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| Abstract: | 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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