Mitsubishi Electric Corporation

Mitsubishi Electric Research Laboratories, Inc.

Muhammad Tahersima

Toshiaki Koike-Akino

Keisuke Kojima

Mitsunobu Gotoda

A grating coupler having first and second ends for coupling a light beam to a waveguide of a chip includes a substrate configured to receive the light beam from the first end and transmit the light beam through the second end, the substrate having a first refractive index n, a grating structure having curved grating lines arranged on the substrate, the grating structure having a second refractive index n, wherein the curved grating lines have line width w and height d and are arranged by a pitch &#x39b;, wherein the second refractive index nis less than first refractive index n, and a cladding layer configured to cover the grating structure, wherein the cladding layer has a third refractive index n

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Washington, DC, United States of America

Muhammad Tahersima