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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 27,
  • Issue 5,
  • pp. 612-618
  • (2009)

Focusing Polarization Diversity Grating Couplers in Silicon-on-Insulator

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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.

© 2009 IEEE

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