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We propose and experimentally demonstrate a scheme of high-Q microwave photonic filter(MPF)using the techniques of self-phase modulation(SPM)spectrum broadening and third-order dispersion(TOD)com-pensation.The optical pulses from a mode-locking laser are spectrally broadened by the SPM in the highly nonlinear fiber.A wideband optical frequency comb with 365 spectral lines within 10-dB power variation from the highest spectral power is obtained.By applying a cubic phase modulation via a waveshaper,the effect of TOD which broadens the MPF passband is eliminated.The final implemented MPF has a Q-value as high as 296 and a tuning range of 700 MHz.
We propose and experimentally demonstrate a scheme of high-Q microwave photonic filter (MPF) using the techniques of self-phase modulation (SPM) spectrum broadening and third-order dispersion (TOD) com- pensation. The optical pulses from a mode-locking laser are spectrally broadened by the SPM in the highly nonlinear fiber. A wideband optical frequency comb with 365 spectral lines within 10-dB power variation from the highest spectral power is.By applying a cubic phase modulation via a waveshaper, the effect of TOD which broadens the MPF passband is eliminated. The final implemented MPF has a Q-value as high as 296 and a tuning range of 700 MHz.