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Proceedings Paper

Progress toward an orthogonal strain state sensor-based optical fiber technology
Author(s): Xiaodan Jin; Thomas Rossmanith; M. Rutherford; James S. Sirkis; Abhijit Dasgupta; Don L. DeVoe; F. F. Rosenberger; Venki Venkat; Yucheng Shi; Charles G. Askins
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Paper Abstract

This paper describes a single micro-optical fiber sensor capable of measuring three strains simultaneously in a composite structure. This single transducer is based on cascading four micro Fabry-Perot cavities to measure three normal strains and one shear strain in the plane of the optical fiber cross-section. The development of the sensor fabrication and signal processing techniques are discussed. This fabrication includes designing and fabricating new optical fibers, optical fiber circuit, and optical fiber multi-strain sensor head. This paper presents 2D and 3D finite element analysis and 2D closed form analysis to establish the transformation between fiber core and composite host strain stats. FEM is also used to design side-hole fiber for maximized sensitivity to transverse strains. Finally, analytical models are presented for expressing the desired strains in the host composite in terms of the measured optical phase shift in the fiber sensor.

Paper Details

Date Published: 31 May 1999
PDF: 16 pages
Proc. SPIE 3670, Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, (31 May 1999); doi: 10.1117/12.349765
Show Author Affiliations
Xiaodan Jin, Univ. of Maryland/College Park (United States)
Thomas Rossmanith, Univ. of Maryland/College Park (United States)
M. Rutherford, Univ. of Maryland/College Park (United States)
James S. Sirkis, Univ. of Maryland/College Park (United States)
Abhijit Dasgupta, Univ. of Maryland/College Park (United States)
Don L. DeVoe, Univ. of Maryland/College Park (United States)
F. F. Rosenberger, Univ. of Maryland/College Park (United States)
Venki Venkat, Analytical Service & Materials, Inc. (United States)
Yucheng Shi, Analytical Service & Materials, Inc. (United States)
Charles G. Askins, Naval Research Lab. (United States)


Published in SPIE Proceedings Vol. 3670:
Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials
Richard O. Claus; William B. Spillman, Editor(s)

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