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Parallel structured optical fiber in-line Fabry-Perot interferometers for high temperature sensing

We propose and demonstrate parallel structured optical fiber in-line Fabry-Perot interferometers for high temperature sensing. The device consists of three Fabry-Perot cavities in parallel connection, which allows three independent fringe patterns superimposed at its output, and, as a result, a numb...

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Bibliographic Details
Published in:Optics letters 2020-02, Vol.45 (3), p.726-729
Main Authors: Cui, X L, Zhang, Hua, Wang, D N
Format: Article
Language:English
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Summary:We propose and demonstrate parallel structured optical fiber in-line Fabry-Perot interferometers for high temperature sensing. The device consists of three Fabry-Perot cavities in parallel connection, which allows three independent fringe patterns superimposed at its output, and, as a result, a number of dominant fringe peaks/dips appear, thus enabling unambiguous measurement in a large range. The device is featured with compact size, robust structure, and excellent high temperature sustainability, which makes it promising in extreme environment monitoring.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.384594