Abstract
A scheme to perform high-quality-factor (Q) reconfigurable microwave
photonic filtering with the optical third-order dispersion (TOD) induced radiofrequency
(RF) distortions compensated is demonstrated. A detailed investigation of
the TOD induced RF distortions is presented both theoretically and experimentally.
By programming the optical spectrum in one arm of the Mach-Zehnder structure,
the distortions can be completely eliminated, giving rise to ideal RF transfer
function which can achieve very high Q factors. The experimentally demonstrated
Q factors are 634 and 76 when the RF center is tuned to 18 GHz and the passband
shape is configured to be sinc-shape and flat-top respectively, the highest
values ever reported for a single-bandpass, complex-tap, and reconfigurable
microwave photonic filter.
© 2013 IEEE
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