High spatial resolution fiber-optic Fizeau interferometric strain sensor based on an in-fiber spherical microcavity

We present a fiber-optic Fizeau interferometric strain sensor consisting of an in-fiber spherical microcavity of 39 μ m in diameter. The spherical microcavity was formed by splicing a normal single-mode fiber with a hollow-core photonic crystal fiber. We demonstrate that strain sensing can be realiz...

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Bibliographic Details
Published in:Applied physics letters 2008-03, Vol.92 (10), p.101117-101117-3
Main Authors: Li, Enbang, Peng, Gang-Ding, Ding, Xin
Format: Article
Language:English
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Summary:We present a fiber-optic Fizeau interferometric strain sensor consisting of an in-fiber spherical microcavity of 39 μ m in diameter. The spherical microcavity was formed by splicing a normal single-mode fiber with a hollow-core photonic crystal fiber. We demonstrate that strain sensing can be realized by using the interference between the light signals reflected by the front and rear surfaces of the sphere. Experiments have shown that the strain sensor has a strain sensitivity of 3.36 pm ∕ μ ε and a temperature sensitivity of 1.35 pm ∕ ° C .
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2895637