Title :
A Simple and Tunable Single-Bandpass Microwave Photonic Filter of Adjustable Shape
Author :
Zhu, Kun ; Ou, Haiyan ; Fu, Hongyan ; Remb, Edvin ; He, Sailing
Author_Institution :
Centre for Opt. & Electromagn. Res., Zhejiang Univ., Hangzhou
Abstract :
A simple and tunable single-bandpass microwave photonic filter of adjustable shape is proposed and experimentally demonstrated. The filter is based on multiple sources (spectrum-sliced by a Mach-Zehnder interferometer) and two cascaded incoherent optical structures, namely, a dispersion medium of 50-km single-mode fiber and a fiber ring delay line. In the experimental range from 1.0 to 3.8 GHz, a discretely tunable single-bandpass filter with a high Q-factor or a flat-top response is achieved by carefully matching the transfer functions of the two individual optical structures.
Keywords :
Q-factor; band-pass filters; microwave filters; microwave photonics; optical delay lines; optical fibre dispersion; optical filters; optical information processing; transfer function matrices; Q-factor; adjustable-shaped filter; cascaded optical structures; dispersion medium; fiber ring delay line; frequency 1.0 GHz to 3.8 GHz; incoherent optical structures; microwave photonic filter; photonic signal processing; single-bandpass filter; single-mode fiber; transfer functions; tunable filter; Cascaded optical structures; microwave photonic filter; microwave photonics; photonic signal processing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2008.2004718
