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Proceedings Paper

Distributed fiber optic strain sensing by synthesizing dynamic grating in polarization-maintaining erbium-doped fiber
Author(s): Xinyu Fan; Zuyuan He; Kazuo Hotate
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Paper Abstract

A novel scheme of distributed fiber-optic strain sensor by localizing a dynamic grating in polarization maintaining erbium-doped fiber is proposed. The dynamic grating, which is introduced by launching two counter-propagating coherent light-beams into pumped erbium-doped fiber per the phenomenon of gain saturation, is examined. Theoretical modeling of the dynamic grating is given and used to make simulations on the reflectivity of the dynamic grating localized by synthesizing the optical coherence function. Theoretical analysis and numerical simulation on the novel sensor scheme show that the Bragg frequency of the dynamic grating will shift according to strain by 0.426MHz/με for typical polarization maintaining erbium-doped fiber.

Paper Details

Date Published: 14 December 2004
PDF: 10 pages
Proc. SPIE 5589, Fiber Optic Sensor Technology and Applications III, (14 December 2004); doi: 10.1117/12.568733
Show Author Affiliations
Xinyu Fan, Univ. of Tokyo (Japan)
Zuyuan He, Univ. of Tokyo (Japan)
Kazuo Hotate, Univ. of Tokyo (Japan)


Published in SPIE Proceedings Vol. 5589:
Fiber Optic Sensor Technology and Applications III
Michael A. Marcus; Brian Culshaw; John P. Dakin, Editor(s)

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