Radio-frequency arbitrary waveform generation based on dispersion compensated tunable optoelectronic oscillator with ultra-wide tunability

Photonic generation of radio-frequency(RF) arbitrary microwave waveform with ultra-wide frequency tunable range based on a dispersion compensated optoelectronic oscillator(OEO) is proposed and experimentally demonstrated. Dispersion compensation scheme and specially designed fiber Bragg grating(FBG)-based Fabry–Perot(F-P) filters are employed in the OEO loop to realize a frequency tunable range of 3.5–45.4 GHz. An optimization process provided by the combination of an erbium-doped fiber amplifier(EDFA)and FBG is employed to improve the signal-to-noise ratio(SNR) of final RF signals. The generation of linearfrequency and phase-coded microwave waveforms, with a tunable carrier frequency ranging from 4 to 45 GHz and tuned chirping bandwidths or code rates, is experimentally demonstrated.