Distributed fiber optic strain sensing by synthesizing dynamic grating in polarization-maintaining erbium-doped fiber

Xinyu Fan; Zuyuan He; Kazuo Hotate

doi:10.1117/12.568733

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14 December 2004 Distributed fiber optic strain sensing by synthesizing dynamic grating in polarization-maintaining erbium-doped fiber

Xinyu Fan, Zuyuan He, Kazuo Hotate

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Proceedings Volume 5589, Fiber Optic Sensor Technology and Applications III; (2004) https://doi.org/10.1117/12.568733
Event: Optics East, 2004, Philadelphia, Pennsylvania, United States

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.

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Xinyu Fan, Zuyuan He, and Kazuo Hotate "Distributed fiber optic strain sensing by synthesizing dynamic grating in polarization-maintaining erbium-doped fiber", Proc. SPIE 5589, Fiber Optic Sensor Technology and Applications III, (14 December 2004); https://doi.org/10.1117/12.568733

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