Uncladded InGaAsP/InP rib waveguides with integrated thickness tapers for efficient fibre-chip butt coupling
- 1 January 1996
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 32 (1), 36-38
- https://doi.org/10.1049/el:19960059
Abstract
The thickness of the waveguide core of uncladded InGaAsP/InP rib waveguides is tapered to fabricate new spot-size transformers without epitaxial regrowth or etching of deep grooves. The coupling loss for flat-end fibres is reduced by 7 dB at alignment tolerances of > ±2 µm for 1 dB excess loss.Keywords
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