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Real-time displacement reconstruction based on all-fiber Fabry–Perot interferometer.
- Source :
-
Optical Fiber Technology . Oct2022, Vol. 73, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
-
Abstract
- • A real-time displacement measurement technique based on all-fiber Fabry–Perot interferometer. • The quadrature detection algorithm can significantly simplify the data processing process. • Two Fabry-Perot interference signals with a phase shift of π / 2 can be obtained directly. • The object displacement can be reconstructed directly by the quadrature demodulation algorithm. • The structure of the system is simple and compact. A real-time displacement reconstruction method based on an all-fiber Fabry–Perot interferometer (FPI) is proposed, utilizing the fiber end face and the object surface to form an extrinsic FPI. Using the constant phase difference of 90° between the two output ports of the 2 × 2 coupler, two-phase orthogonal FPI signals carrying the object motion information can be detected by two invisible photodetectors, and real-time displacement reconstruction can be realized by adopting inverse tangent and unwrapping processing procedures. Results show that the absolute errors of the experiment are below 80 nm. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10685200
- Volume :
- 73
- Database :
- Academic Search Index
- Journal :
- Optical Fiber Technology
- Publication Type :
- Academic Journal
- Accession number :
- 159628419
- Full Text :
- https://doi.org/10.1016/j.yofte.2022.103015