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Georgieva, Galina
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Mai, Christian
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Petermann, Klaus
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Seiler, Pascal M.
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Voigt, Karsten
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Zimmermann, Lars
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2D grating
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Japanese journal of applied physics : JJAP 59 (2020), Nr. SO
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Cross-polarization effects in sheared 2D grating couplers in a photonic BiCMOS technology
(
Bristol : IOP Publ.,
2020
)
Georgieva, Galina
;
Voigt, Karsten
;
Mai, Christian
;
Seiler, Pascal M.
;
Petermann, Klaus
;
Zimmermann, Lars
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We investigate numerically and experimentally sheared 2D grating couplers in a photonic BiCMOS technology with a focus on their splitting behavior. Two realization forms of a waveguide-To-grating shear angle are considered. The cross-polarization used as a figure-of-merit is shown to be strongly dependent on the grating perturbation strength and is a crucial limitation not only for the grating splitting performance, but also for its coupling efficiency. © 2020 The Japan Society of Applied Physics.
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