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• W2999650620 abstract "Two-dimensional grating couplers are important components for silicon photonic circuits to achieve light coupling from/to a fiber for both polarizations. A two-dimensional grating coupler structure with a high coupling efficiency and a low polarization dependent loss is demonstrated. Using two crossing ellipses as the grating scatter and a diamond-like grating lattice, the polarization dependent loss of the grating coupler can be reduced. The coupling loss is further decreased with a metal mirror, which reaches −1.73 dB theoretically at 1310 nm wavelength. Experimentally, −2.37 dB coupling loss is achieved with an 1 dB coupling bandwidth of 29 nm. The corresponding PDL was measured lower than 0.2 dB in a wavelength range of 78 nm. The proposed configuration for the metal mirror also facilitates a robust wafer-scale post-processing as well as an easy fiber alignment." @default.
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• W2999650620 date "2020-01-29" @default.
• W2999650620 modified "2023-10-17" @default.
• W2999650620 title "Two-dimensional grating coupler on silicon with a high coupling efficiency and a low polarization-dependent loss" @default.
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• W2999650620 doi "https://doi.org/10.1364/oe.380338" @default.
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