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Dual grating-assisted directional coupling between fibers and thin semiconductor waveguides

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3 Author(s)
Masanovic, G.Z. ; Sch. of Electron. & Phys. Sci., Univ. of Surrey, Guildford, UK ; Passaro, V.M.N. ; Reed, G.T.

A novel dual grating-assisted directional coupler (DGADC) for coupling an optical fiber with a thin semiconductor waveguide is proposed. As an example, a DGADC in silicon-on-insulator is discussed. Maximum coupling efficiency in excess of 90% can be obtained using this coupler, while the highest coupling efficiency previously reported was only 40%.

Published in:

Photonics Technology Letters, IEEE  (Volume:15 ,  Issue: 10 )