Abstract
A novel broadband photonic RF phase shifter is proposed that employs
single-sideband modulation of the broadband RF signal onto an optical carrier.
The phase of the carrier is shifted relative to the modulated signal using
an optical allpass filter. Ring-resonator-based optical allpass filters are
tuned across the carrier frequency to yield an RF phase shift of over 360
degrees. Results from a proof-of-concept experimental demonstration are presented
for modulation frequencies in the range of 2–4 GHz.
© 2008 IEEE
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