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Leakage loss in trench-bulge waveguides

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5 Author(s)
Krause, M. ; Tech. Univ. Hamburg-Harburg, Hamburg, Germany ; Renner, H. ; Harke, A. ; Muller, Jorg
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This paper shows that leakage loss is an important loss mechanism in integrated optical trench-bulge waveguides. The propagation losses due to leakage can easily exceed 1 dB/cm in these waveguide geometries. By simply using a deeper trench or a cavity in the substrate to deposit the waveguide in, the leakage losses can be reduced dramatically.

Published in:

Lightwave Technology, Journal of  (Volume:23 ,  Issue: 5 )