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- Huang, Qiangsheng, et al.
(författare)
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Ultracompact tapered coupler for the Si/III-V heterogeneous integration
- 2015
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Ingår i: Applied Optics. - 1559-128X .- 2155-3165. ; 54:14, s. 4327-4332
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Tidskriftsartikel (refereegranskat)abstract
- An ultracompact tapered coupler, which is suitable for mode transformation between a 220 nm high silicon wire waveguide and a Si/III-V hybrid waveguide, is proposed for Si/III-V heterogeneous integration. The tapered coupler is composed of three sections. Since the tapered coupler avoids exciting the unwanted high-order modes in the III-V waveguide, the length of the tapered coupler can be dramatically shortened. In the proposed structure, the total length of the trisectional tapered coupler can be as short as 8 mu m with a fundamental mode-coupling efficiency of over 95% in a bandwidth of over 100 nm. The alignment tolerance of the proposed structure is also analyzed.
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