All optical microwave photonic filters with a round-trip configuration

作者：Ning G^*; Aditya S; Shum P; Cheng L; Dong H

来源：Applied Physics B: Lasers and Optics , 2008, 90(1): 137-140.

DOI：10.1007/s00340-007-2839-8

We propose novel photonic microwave multi-tap filters using a section of Hi-Bi fiber in a round-trip configuration, together with their application in a 20 km single mode fiber (SMF) radio-over-fiber (RoF) link. We demonstrate for the first time that the effect of chromatic dispersion in these multi-tap filters can be reduced in an RoF link when a linearly chirped fiber Bragg grating (FBG) is adopted. This result can be used to combat radio frequency power fading in an RoF link. The configurations are free from optical coherent interference and phase noise. Measured results show 3-tap filters with notch rejections greater than 35 dB and suppression of the level of secondary sidelobes by adjusting a polarization controller.

• 出版日期2008-1
• 单位南阳理工学院