Periodically chirped sampled fiber Bragg gratings for multichannel comb filters

Periodically chirped sampled fiber Bragg gratings (PC-SFBGs) are proposed as multichannel comb filters. A PC-SFBG consists of many chirp periods corresponding to the periodic chirp effect. With the same chirp coefficient released for a linearly chirped SFBG (LC-SFBG), the spectral self-imaging pheno...

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Bibliographic Details
Published in:IEEE photonics technology letters 2006-06, Vol.18 (12), p.1371-1373
Main Authors: Xi-Hua Zou, Wei Pan, Luo, B., Zhang-Miao Qin, Meng-Yao Wang, Wei-Li Zhang
Format: Article
Language:English
Subjects:
Bands
Bragg gratings
Chirp
Chirp modulation
Coefficients
Communication networks
Fibers
Gratings
Multichannel
Optical fiber devices
Optical fibers
optical filter
Optical filters
Optical refraction
Phase modulation
Reflectivity
Sampling methods
Tolerances
wavelength-division multiplexing
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Summary:Periodically chirped sampled fiber Bragg gratings (PC-SFBGs) are proposed as multichannel comb filters. A PC-SFBG consists of many chirp periods corresponding to the periodic chirp effect. With the same chirp coefficient released for a linearly chirped SFBG (LC-SFBG), the spectral self-imaging phenomenon is also observed in the PC-SFBG. Compared with a uniform SFBG, the PC-SFBG exhibits a narrower channel spacing and a similar group-delay characteristic in the reflection bands. Meanwhile, the PC-SFBG ensures a more accurate phase-shift condition (or a better tolerance on the chirp coefficient) and higher peak reflectivities than the LC-SFBG
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2006.877349