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Polymer optical fiber for large strain measurement based on multimode interference.

Authors
Type
Published Article
Journal
Optics Letters
1539-4794
Publisher
The Optical Society
Publication Date
Volume
37
Issue
20
Pages
4308–4310
Identifiers
DOI: 10.1364/OL.37.004308
PMID: 23073446
Source
Medline

Abstract

This Letter reports a polymer optical fiber (POF) based large strain sensor based on the multimode interference (MMI) theory for the application of structural health monitoring. A section of POFs is sandwiched between two silica single mode fibers to construct a single-mode-multimode-single-mode structure that produces a MMI spectrum. The strain sensing mechanism of the device was investigated and experimentally verified. A large dynamic range of 2×10(4) με (2%) and a detection limit of 33 µε have been demonstrated.

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