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Apodized Focusing Fully Etched Sub-wavelength Grating Couplers With Ultra-low Reflections

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Abstract

We experimentally demonstrate apodized focusing fully etched sub-wavelength grating couplers for the transverse electric (TE) mode. An insertion loss of 4.2 dB, 1-dB bandwidth of 36 nm, and back reflection of -24 dB have been obtained.

© 2015 Optical Society of America

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