Journal
OPTICS EXPRESS
Volume 18, Issue 6, Pages 6156-6163Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.006156
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Funding
- European Commission
- Danish Research Councils
- Generalitat Valenciana
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In this work we demonstrate for the first time, to the best of our knowledge, a continuously tunable 360 degrees microwave phase shifter spanning a microwave bandwidth of several tens of GHz (up to 40 GHz) by slow light effects. The proposed device exploits the phenomenon of coherent population oscillations, enhanced by optical filtering, in combination with a regeneration stage realized by four-wave mixing effects. This combination provides scalability: three hybrid stages are demonstrated but the technology allows an all-integrated device. The microwave operation frequency limitations of the suggested technique, dictated by the underlying physics, are also analyzed. (C) 2010 Optical Society of America
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