A novel tunable cascaded IIR microwave photonic filter

被引：16
作者：
Zhou, Lina
Zhang, Xinliang [1 ]
Xu, Enming
Yu, Yuan
Li, Xiang
Huang, Dexiu
机构：
[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2010年 / 283卷 / 14期
关键词：
Microwave photonic filter; Infinite impulse response; Cascade; Q factor; Tunable; Semiconductor optical amplifier; Cross-gain modulation; SIGNALS;
D O I：
10.1016/j.optcom.2010.03.012
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A new tunable cascaded infinite impulse response (IIR) microwave photonic filter is presented, based on a novel configuration in which a semiconductor optical amplifier (SOA) is inserted between two active recirculating delay line (RDL) loops Due to wavelength conversion with cross-gain modulation (XGM) in SOA, interferences between light beams traveling different paths are canceled, ensuring a stable transmission. By employing this configuration, a cascaded IIR microwave photonic filter is firstly achieved The free spectral range (FSR) and the Q factor are both increased significantly by adopting "vernier effect" technique in the IIR filter. The structure is also tunable by adjusting the length of one RDL loop (C) 2010 Elsevier B.V. All rights reserved
引用
收藏
页码：2794 / 2797
页数：4
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