Grating coupler with high optical coupling efficiency for SMF

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United States of America Patent

PATENT NO 9971099
SERIAL NO

15703069

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Abstract

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A grating coupler includes a grating including a core and an anti-phase reflection coating provided on at least one part of the grating. The anti-phase reflection coating includes a high refractive index layer and a buffer layer. The high refractive index layer has at least one selected from a plurality of attributes characterizing the high refractive index layer. The at least one selected attribute gradually deceases along a propagation direction of light in the core of the grating.

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Patent Owner(s)

Patent OwnerAddress
NEC CORPORATION7-1 SHIBA 5-CHOME MINATO-KU TOKYO 108-8001
PHOTONICS ELECTRONICS TECHNOLOGY RESEARCH ASSOCIATION20-10 SEKIGUCHI 1-CHOME BUNKYO-KU TOKYO 112-0014

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Tokushima, Masatoshi Tokyo, JP 31 469
Ushida, Jun Tokyo, JP 24 411

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