A nonlinear optoelectronic filter for electronic signal processing
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Loh-2014-A nonlinear optoelectronic.pdf
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693.58 KB
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Author(s)
Loh, William
Ram, Rajeev J.
Juodawlkis, Paul W.
Yegnanarayanan, Sivasubramania
Date Issued
January 2014
Journal
Scientific Reports
Publisher
Nature Publishing Group
Citation
Loh, William, Siva Yegnanarayanan, Rajeev J. Ram, and Paul W. Juodawlkis. “A Nonlinear Optoelectronic Filter for Electronic Signal Processing.” Sci. Rep. 4 (January 9, 2014).
Version
Final published version
Abstract
The conversion of electrical signals into modulated optical waves and back into electrical signals provides the capacity for low-loss radio-frequency (RF) signal transfer over optical fiber. Here, we show that the unique properties of this microwave-photonic link also enable the manipulation of RF signals beyond what is possible in conventional systems. We achieve these capabilities by realizing a novel nonlinear filter, which acts to suppress a stronger RF signal in the presence of a weaker signal independent of their separation in frequency. Using this filter, we demonstrate a relative suppression of 56 dB for a stronger signal having a 1-GHz center frequency, uncovering the presence of otherwise undetectable weaker signals located as close as 3.5 Hz away. The capabilities of the optoelectronic filter break the conventional limits of signal detection, opening up new possibilities for radar and communication systems, and for the field of precision frequency metrology.
MIT Department
Lincoln Laboratory
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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Creative Commons Attribution-NonCommercial-ShareAlike 3.0
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DOI of Published Version
https://doi.org/10.1038/srep03613
