Ultrawide Tunable Microwave Photonic Notch Filter Based on Stimulated Brillouin Scattering

Author

Zhang, Weiwei ; Minasian, Robert A.

Author_Institution

Inst. of Photonics & Opt. Sci., Univ. of Sydney, Sydney, NSW, Australia

Volume

24

Issue

14

fYear

2012

fDate

7/15/2012 12:00:00 AM

Firstpage

1182

Lastpage

1184

Abstract

A new ultrawide tunable microwave photonic notch filter that exhibits a very high resolution is presented. It is based on a stimulated Brillouin scattering technique, which processes the modulation sidebands generated by a dual-drive Mach-Zehnder modulator. Tuning is realized by changing the drive frequency to an electro-optic intensity modulator. Experimental results demonstrate a high-resolution notch filter with a 3-dB bandwidth of 82 MHz, a notch depth of over 40 dB, a flat passband from near DC to 20 GHz with very low ripples, and a notch frequency that can be continuously tuned with shape invariance over an ultrawide frequency range from 2 to 20 GHz.

Keywords

Mach-Zehnder interferometers; electro-optical filters; electro-optical modulation; intensity modulation; microwave filters; notch filters; stimulated Brillouin scattering; bandwidth 82 MHz; dual-drive Mach-Zehnder modulator; electro-optic intensity modulator; frequency 2 GHz to 20 GHz; microwave photonic notch filter; modulation sidebands; stimulated Brillouin scattering; ultrawide tunable filter; Amplitude modulation; Microwave filters; Microwave photonics; Optical fiber filters; Resonator filters; Scattering; Microwave filters; microwave photonics; notch filters; stimulated Brillouin scattering (SBS);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2012.2198638

Filename

6208824