Journal article
Tunable true-time delay of a microwave photonic signal realized by cross gain modulation in a semiconductor waveguide
We experimentally demonstrate the realization of a tunable true-time delay for microwave signals by exploiting cross gain modulation among counter-propagating optical beams in a semiconductor optical amplifier. Broadband operation from ∼5 to ∼35 GHz is observed. The physical effect originates from the combination of carrier dynamics and propagation effects, and the experimental results are well accounted for by a numerical model.
We find that, in contrast to the case of the co-propagating beams, the bandwidth is not limited by the lifetime of excited carriers. The trade-off between the magnitude of the true-time delay and the microwave bandwidth is discussed. © 2011 American Institute of Physics.
Language: | English |
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Publisher: | American Institute of Physics |
Year: | 2011 |
Pages: | 231102 |
ISSN: | 10773118 and 00036951 |
Types: | Journal article |
DOI: | 10.1063/1.3665946 |
ORCIDs: | Mørk, Jesper |