Tunable true-time delay of a microwave photonic signal realized by cross gain modulation in a semiconductor waveguide

Weiqi Xue, Jesper Mørk

Research output: Contribution to journalJournal articleResearchpeer-review

293 Downloads (Pure)

Abstract

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.
Original languageEnglish
JournalApplied Physics Letters
Volume99
Issue number23
Pages (from-to)231102
ISSN0003-6951
DOIs
Publication statusPublished - 2011

Bibliographical note

Copyright 2011 American Institute of Physics (AIP)

Fingerprint Dive into the research topics of 'Tunable true-time delay of a microwave photonic signal realized by cross gain modulation in a semiconductor waveguide'. Together they form a unique fingerprint.

Cite this