Highly Sensitive Air-Gap Fiber Fabry-Pérot Interferometers Based on Polymer-Filled Hollow Core Fibers

This letter, for the first time, investigates a novel, and ultracompact air-gap fiber Fabry-Pérot interferometer (AG-FFPI), which is based on a polymer-filled hollow core fiber (HCF) endface. The proposed polymer-filled AG-FFPI has advantages of easy fabrication, high temperature sensitivity, low c...

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Bibliographic Details
Published in:IEEE photonics technology letters 2012-01, Vol.24 (2), p.149-151
Main Authors: Lee, Cheng-Ling, Lee, Lin-Hung, Hwang, Hone-Ene, Hsu, Jui-Ming
Format: Article
Language:English
Subjects:
Air gaps
Air-gap fiber Fabry-Pérot interferometer (AG-FFPI)
Cavity resonators
fiber optics component
fiber sensors
hollow core fiber (HCF)
Optical fiber sensors
polymer
Polymers
Sensitivity
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Summary:This letter, for the first time, investigates a novel, and ultracompact air-gap fiber Fabry-Pérot interferometer (AG-FFPI), which is based on a polymer-filled hollow core fiber (HCF) endface. The proposed polymer-filled AG-FFPI has advantages of easy fabrication, high temperature sensitivity, low cost, and arbitrary length of air-gap. The variation of the Fabry-Pérot cavity length can be greatly enhanced from exploiting the high thermal expansion coefficient of the elastic polymer-filled in the HCF. The proposed device exhibits a wavelength shift of the interference fringes that corresponds to temperature sensitivity of , which is equivalent to sensitivity to a change in cavity length of .
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2011.2174632