Abstract
Based on single-sideband (SSB) modulation, a novel scheme
to simultaneously implement all-optical microwave bandpass filtering and up-conversion
is proposed, which is favorable for radio-over-fiber (ROF) applications. SSB
modulation with different sidebands will theoretically bring $\pi$ phase difference on a microwave signal by utilizing dual-electrode
Mach–Zehnder modulators. This effect is the key to the realization of
bandpass filtering, which was experimentally verified. With the help of several
other photonic devices, a five-tap bandpass filter integrated with heterodyne-detection-based
microwave frequency up-conversion was demonstrated theoretically. Besides
the up-conversion function, the simulation certification of our proposed scheme
also indicated some well filtering characteristics, such as more than 2-dB
secondary sidelobe ratio improvement, the reconfigurability by applying different
window functions, the filtering tunability with the center intermediate frequency
(IF) from 2.16 to 4.08 GHz, and the moderate tolerance to a large dynamic
IF input signal. The proposed scheme features the feasibility of the integration
of some cost-effective frequency multiplication methods and the flexible bandpass-filtering
characteristics for millimeter-wave ROF systems.
© 2008 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription