Chinese Optics Letters, 2016, 14 (6): 060601, Published Online: Aug. 3, 2018
Sidelobe suppression analysis of microwave photonic filter based on spectrum-shaped optical frequency combs Download: 859次
Abstract
A finite impulse-response microwave photonic filter is typically achieved based on spectrum-shaped optical frequency combs and a dispersive element. We propose an analytical model to describe the amplitude responses of the sidelobes. The model shows that the sidelobe suppression ratio is limited by the spectrum structure of the optical combs. By taking Gaussian-profiled combs as an example, it is both theoretically and experimentally proved that the suppression ratio can be improved by optimizing the spectral power range, which is defined as the ratio of the maximum tap weight to the minimum tap weight.
Yang Yu, Shangyuan Li, Xiaoping Zheng, Hanyi Zhang, Bingkun Zhou. Sidelobe suppression analysis of microwave photonic filter based on spectrum-shaped optical frequency combs[J]. Chinese Optics Letters, 2016, 14(6): 060601.