Journal
OPTICS EXPRESS
Volume 20, Issue 10, Pages 10796-10806Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.010796
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Funding
- European Commission
- Generalitat Valenciana [2008/092]
- Plan Nacional I + D [TEC2011-29120-C05-05, TEC2008-06145]
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A broadband microwave photonic phase shifter based on a single III-V microdisk resonator heterogeneously integrated on and coupled to a nanophotonic silicon-on-insulator waveguide is reported. The phase shift tunability is accomplished by modifying the effective index through carrier injection. A comprehensive semi-analytical model aiming at predicting its behavior is formulated and confirmed by measurements. Quasi-linear and continuously tunable 2 pi phase shifts at radiofrequencies greater than 18 GHz are experimentally demonstrated. The phase shifter performance is also evaluated when used as a key element in tunable filtering schemes. Distortion-free and wideband filtering responses with a tuning range of similar to 100% over the free spectral range are obtained. (C) 2012 Optical Society of America
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