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

Volume

26

Issue

12

fYear

2014

fDate

15-Jun-14

Firstpage

1219

Lastpage

1222

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2014.2319297

Filename

6803857