Chinese Optics Letters, 2019, 17 (3): 030601, Published Online: Mar. 8, 2019
Photonic microwave filters with ultra-high noise rejection [Invited] Download: 778次
Abstract
As a key figure-of-merit for high-performance microwave filters, the out-of-band noise rejection is of critical importance in a wide range of applications. This paper overviews the significant advances in photonic microwave filters (PMFs) having ultra-high rejection ratios for out-of-band noise suppression over the last ten years. Typically, two types of PMFs, the bandpass and bandstop ones, are introduced with fundamental principles, detailed approaches, and then cutting-edge results for noise rejection. Ultra-high noise rejection ratios of ~80 dB and >60 dB have been demonstrated for single-passband and single-stopband PMFs, respectively, which are comparable with the state-of-the-art electronic filters operating in stringent conditions. These PMFs are also characterized by wide frequency coverage, low frequency-dependent loss, and strong immunity to electromagnetic interference due to the intrinsic features from the advanced photonics technology.
Xihua Zou, Peixuan Li, Wei Pan, Lianshan Yan. Photonic microwave filters with ultra-high noise rejection [Invited][J]. Chinese Optics Letters, 2019, 17(3): 030601.