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Paper detail

Dual-polarization multiplexing amorphous Si:H grating couplers for silicon photonic transmitters in the photonic BiCMOS backend of line

We report on polarization combining 2D grating couplers (2D GCs) on amorphous Si:H, fabricated in the backend of line of a photonic BiCMOS platform. The 2D GCs can be used as an interface of a hybrid silicon photonic coherent transmitter, which can be implemented on bulk Si wafers. The fabricated 2D GCs operate in the telecom C-band and show an experimental coupling efficiency of -5 dB with a wafer variation of +/-1.2 dB. Possibilities for efficiency enhancement and improved performance stability in future design generations are outlined and extension towards O-band devices is investigated as well.

preprint2022arXivOpen access
Galina GeorgievaChristian MaiPascal M. SeilerAnna PeczekLars Zimmermann
physics.app-phphysics.optics
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Galina GeorgievaChristian MaiPascal M. SeilerAnna PeczekLars Zimmermann

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