Abstract

A new method of fabrication of long-period fiber gratings by twisting of a standard single-mode fiber at high temperature is presented. The method relies on the fact that there always exists some core–cladding eccentricity in the optical fiber. Therefore, when the fiber is twisted, its core follows a helicoidal path inside the cladding. The transmission spectrum of the helicoidal long-period fiber grating that is produced contains several dips that correspond to resonances with the fiber cladding modes.

© 2005 Optical Society of America

Long-period grating fabricated by periodically tapering standard single-mode fiber

Li-Yang Shao, Jian Zhao, Xinyong Dong, H. Y. Tam, C. Lu, and Sailing He
Appl. Opt. 47(10) 1549-1552 (2008)

Strain-insensitive and high-temperature long-period gratings inscribed in photonic crystal fiber

Yinian Zhu, Ping Shum, Hui-Wen Bay, Min Yan, Xia Yu, Juanjuan Hu, Jianzhong Hao, and Chao Lu
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Fabrication of long-period gratings in poly(methyl methacrylate-co-methyl vinyl ketone-co-benzyl methacrylate)-core polymer optical fiber by use of a mercury lamp

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Fabrication of helical long-period fiber gratings by use of a CO₂ laser

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Virtual long-period gratings

César Jáuregui and José Miguel López-Higuera
Opt. Lett. 30(1) 14-16 (2005)