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Opt Express. 2010 Mar 15;18(6):6156-63. doi: 10.1364/OE.18.006156.

Wideband 360 degrees microwave photonic phase shifter based on slow light in semiconductor optical amplifiers.

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1
DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark,Build. 343, DK-2800 Kongens Lyngby, Denmark. wexu@fotonik.dtu.dk

Abstract

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). 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.

PMID:
20389638
[Indexed for MEDLINE]
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