Abstract
We propose and demonstrate a new and simple method for achieving continuously
tunable microwave frequency multiplication using an unbalanced temporal pulse
shaping (TPS) system incorporating two linearly chirped fiber Bragg gratings
(LCFBGs) written in erbium/ytterbium co-doped fibers. By optically pumping
the LCFBGs with different pumping power, the dispersion of the LCFBGs is tuned.
The incorporation of the LCFBGs in an unbalanced TPS system would enable the
generation of a frequency tunable microwave waveform. The operation of the
system is discussed which is then verified by an experiment. Continuously
tunable microwave frequency multiplication with a multiplication factor from
5.14 to 11.9 is experimentally demonstrated. The impact of the ripples in
the magnitude and group delay responses of the LCFBGs on the performance of
the microwave generation is also studied.
© 2012 IEEE
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