Open AccessTunable photonic microwave notch filter using SOA-based single-longitudinal mode, dual-wavelength laser
Author(s) -
Kwanil Lee,
Ju Han Lee,
Sang Bae Lee
Publication year - 2009
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.013216
Subject(s) - fiber bragg grating , optics , band stop filter , materials science , microwave , fiber laser , longitudinal mode , photonic crystal fiber , laser , photonics , wavelength , optoelectronics , filter (signal processing) , physics , low pass filter , quantum mechanics , computer science , computer vision
A novel photonic microwave notch filter with capability of frequency tuning is proposed and experimentally demonstrated. The scheme is based on a fiber Bragg grating (FBG)-based, single longitudinal mode, wavelength-spacing tunable dual-wavelength fiber laser and a dispersive fiber delay line. By using a symmetrical S-bending technique along the FBGs, the wavelength spacing of the laser can be tuned, which enables the microwave notch frequency tuning. Experimental results show that the notch rejection of more than 30 dB and the flexible tunability of notch frequency can be readily achieved in the range of 1.2 approximately 6.7 GHz.