Fused vertical couplers

A vertical directional coupler fabricated using wafer fusion is demonstrated with a very short coupling length of 62 μm. The optical propagation loss introduced by the fused layer is investigated. An excess loss of 1.1 dB/cm at 1.55 μm was measured for waveguides which incorporate a fused junction n...

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Bibliographic Details
Published in:Applied physics letters 1998-05, Vol.72 (21), p.2637-2638
Main Authors: Liu, Bin, Shakouri, Ali, Abraham, Patrick, Kim, Boo-Gyoun, Jackson, Andrew W., Bowers, John E.
Format: Article
Language:English
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Summary:A vertical directional coupler fabricated using wafer fusion is demonstrated with a very short coupling length of 62 μm. The optical propagation loss introduced by the fused layer is investigated. An excess loss of 1.1 dB/cm at 1.55 μm was measured for waveguides which incorporate a fused junction near the core region. Fused vertical couplers make it possible to realize three-dimensional waveguide structures and compact switching arrays and they solve some of the topology problems of large switch arrays.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.121440