Title :
Large-Tap Microwave Photonics Filter Based on Recirculating Frequency Shifting Loop
Author :
Jingjing Wang ; Minghua Chen ; Hongwei Chen ; Sigang Yang ; Shizhong Xie
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
A novel large-tap and tunable microwave photonics (MWPs) filter based on a recirculating frequency shifting loop has been proposed and experimentally demonstrated. To improve the Q-factor value of the MWP filter, we used a simple recirculation loop to economically generate a large-tone optical frequency comb in this scheme. In addition, the cumulative effect in loop structure, which affects the characteristics of the generated taps significantly, is analyzed to predict the performance of the proposed filter. In experiments, we realized a 70-tap filter at 4.5 GHz with the Q-factor value exceeding 70. Also, a filter with center frequency tunable from 1 to 8 GHz is demonstrated.
Keywords :
Q-factor; microwave filters; microwave photonics; optical filters; Q-factor; frequency 1 GHz to 8 GHz; large-tap microwave photonic filter; large-tone optical frequency comb generation; loop structure; recirculating frequency shifting loop; tunable microwave photonic filter; Finite impulse response filters; Microwave filters; Optical fiber filters; Optical fibers; Photonics; Microwave photonics filters; Q-factor enhancement; optical frequency comb; recirculating frequency shifting loop;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2319297
