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Fabrication and characteristics of phase-shifted beat gratings induced by CO2 laser

✍ Scribed by Yan-en Fan; Tao Zhu; Leilei Shi; Yun-Jiang Rao

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
1019 KB
Volume
53
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

We propose and investigate a phase‐shifted long‐period fiber grating (LPFG) written by CO~2~ laser in twisted single‐mode fibers (SMFs).For the beating effect, two peaks of LPFG derived from phase‐shift further split into two peaks, respectively. The evolution and characterization of the transmission spectra were investigated. The channel spacing of the phase‐shifted LPFGs written in twisted Er‐doped fiber could be much narrower than that of which written in twisted normal SMF. Polarization dependent loss of the phase‐shifted beat‐gratings is less than 0.6 dB. This type of gratings provides potential applications in optical communication systems, such as course wavelength division multiplexing devices. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2526–2530, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26340

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