Performance limitation of chirped-fiber-Bragg-grating-based photonic microwave notch filter due to group delay and reflectivity ripples

Title
Performance limitation of chirped-fiber-Bragg-grating-based photonic microwave notch filter due to group delay and reflectivity ripples
Authors
장유민정우진이관일이주한
Keywords
microwave; photonic; fiber; Photonic microwave filter; Tunable notch filter; Chirped fiber Bragg grating
Issue Date
2011-02
Publisher
Optics communications
Citation
VOL 284, NO 4, 952-956
Abstract
We investigated the performance limitation of a frequency-tunable photonic microwave notch filter incorporating a chirped fiber Bragg grating (FBG) as a group delay line. In particular, we carried out theoretical and experimental studies to analyze the impact of the reflectivity ripple (RR) and group delay ripple (GDR) in the chirped FBG on the output notch performance. The results of experimental and theoretical analyses performed on a photonic microwave notch filter in which an S-bending-based linearly chirped FBG was incorporated, revealed that the notch depth and notch frequency were significantly affected by imperfections in the chirped FBG. The notch depth was found to be decreased by the RRs, whereas significant fluctuations in the notch frequency were caused by the GDRs. On the basis of the obtained results, we conclude that the RR and the GDR are the fundamental factors that degrade the performance of chirped FBG-based photonic microwave filters.
URI
http://pubs.kist.re.kr/handle/201004/40637
ISSN
0030-4018
Appears in Collections:
KIST Publication > Article
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