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

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Abstract
We present a fiber-optic Fizeau interferometric strain sensor consisting of an in-fiber spherical microcavity of 39 mu 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/mu epsilon and a temperature sensitivity of 1.35 pm/degrees C. (C) 2008 American Institute of Physics.
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Li, E
Peng, Gang-Ding
Ding, X
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2008
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Journal Article
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UNSW Faculty
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