Chinese Optics Letters, 2014, 12 (8): 080601, Published Online: Jul. 31, 2014
High-Q microwave photonic filter with self-phase modulation spectrum broadening and third-order dispersion compensation Download: 829次
060.5625 Radio frequency photonics 060.4370 Nonlinear optics, fibers 070.1170 Analog optical signal processing 070.2615 Frequency filtering
Abstract
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.
Dan Zou, Xiaoping Zheng, Shangyuan Li, Hanyi Zhang, Bingkun Zhou. High-Q microwave photonic filter with self-phase modulation spectrum broadening and third-order dispersion compensation[J]. Chinese Optics Letters, 2014, 12(8): 080601.