Title :
A Novel Broadband Photonic RF Phase Shifter
Author :
Adams, Donald B. ; Madsen, Christi K.
Author_Institution :
Texas A&M Univ., College Station, TX
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.
Keywords :
microwave phase shifters; microwave photonics; optical filters; optical modulation; optical phase shifters; optical resonators; broadband RF signal; broadband photonic RF phase shifter; carrier frequency; modulation frequencies; optical allpass filter; optical carrier; ring-resonator-based optical allpass filters; single-sideband modulation; Delay; Optical attenuators; Optical filters; Optical modulation; Optical ring resonators; Optical signal processing; Phase modulation; Phase shifters; Radio frequency; Tunable circuits and devices; Optical fibers; optical signal processing;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2008.927781
