Tunable photonic microwave bandpass filter using phase Modulation and a chirped fiber grating in a Sagnac loop

Author

Ning, G. ; Aditya, S. ; Shum, P. ; Cheng, L.H. ; Gong, Y.D. ; Lu, Chao

Author_Institution

Network Technol. Res. Centre, Nanyang Technol. Univ., Singapore, Singapore

Volume

17

Issue

9

fYear

2005

Firstpage

1935

Lastpage

1937

Abstract

We propose a novel all-optical microwave bandpass filter configuration, which uses phase modulation and a linearly chirped fiber grating in a Sagnac loop. The free spectral range (FSR) of the filter can be tuned continuously by tuning the grating. We also derive an expression for the filter transfer function. Calculated and measured results, which agree well, are presented to show a large notch rejection and an easily tunable FSR.

Keywords

Bragg gratings; band-pass filters; chirp modulation; microwave photonics; optical fibres; optical filters; optical modulation; optical transfer function; optical tuning; phase modulation; Sagnac loop; all-optical filter; chirped fiber grating; filter transfer function; free spectral range; microwave bandpass filter; notch reflection; phase modulation; photonic filter; tunable filter; Band pass filters; Bragg gratings; Chirp; Fiber gratings; Microwave filters; Optical fiber filters; Optical filters; Phase modulation; Sagnac interferometers; Tunable circuits and devices; Fiber Bragg grating (FBG); microwave photonics; optical transversal filter;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2005.851928

Filename

1498908