Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 26, Issue 4, Pages 408-410Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2013.2295624
Keywords
Integrated optics; optical waveguides; optical couplers
Funding
- European Community [ICT 257210 PARADIGM]
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Parasitic reflections can deteriorate the performance of a photonic integrated circuit. This is especially true in circuits containing amplifiers, but even in passive circuits, small reflections can already have a strong influence on circuit performance. It is known that strong reflections can be present when using a 2 x 1 multimode interference coupler (MMI) as a combiner. We investigate methods for reducing these spurious reflections in a generic integration technology. We present a novel MMI shape whose measurements show reduced reflections by 17.5 dB.
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