Tunable microwave photonic transversal filter
Copyright © Cambridge University Press and the European Microwave Association 2015. 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.
International Journal of Microwave and Wireless Technologies
Tunable microwave photonic transversal filter.
International Journal of Microwave and Wireless Technologies,
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/7783