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Tunable microwave photonic transversal filter

Published online by Cambridge University Press:  16 April 2015

Joseph W. Haefner ,
Christopher T. Middlebrook ,
Alexander L. Adams ,
Charles F. Middleton  and
J. Richard Desalvo
Joseph W. Haefner
Affiliation:
Department of Electrical and Computer Engineering, Michigan Technological University, Houghton, MI 49931, USA
Christopher T. Middlebrook*
Affiliation:
Department of Electrical and Computer Engineering, Michigan Technological University, Houghton, MI 49931, USA
Alexander L. Adams
Affiliation:
Harris Corporation, Melbourne, FL 32905, USA
Charles F. Middleton
Affiliation:
Harris Corporation, Melbourne, FL 32905, USA
J. Richard Desalvo
Affiliation:
Harris Corporation, Melbourne, FL 32905, USA
*
*Corresponding author:C. T. Middlebrook Email: ctmiddle@mtu.edu
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Abstract

We present a tapped tunable delay line filter for radiofrequency (RF) photonic filtering applications, capable of rapid tunability over a wide RF bandwidth limited only by the optical components’ losses, while maintaining independence from polarization state. Multiple fiber taps with contrasting dispersion slopes are used in intensity-modulated direct detection microwave photonic links. A temporal delay is generated between the signals within each arm of the link. Once a signal is received using balanced differential detection, nulls are generated as a function of the laser's operating wavelength. Tuning of the laser allows for a rapid shifting of the nulls in the RF spectrum to dynamically mitigate co-site interference. Through this method we demonstrate the potential for rapid tunability over the RF spectrum by the variation of the operating wavelength of the optical carrier.

Keywords

Fiber optics communicationsFiber optics links and subsystemOptical communicationsFrequency filtering
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 8 , Issue 2 , March 2016 , pp. 205 - 213
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2015 

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References

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