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Proceedings Paper

Measurement of small strain of a solid body by two-frequency laser optical fiber sensor
Author(s): Yin Fang; Kemin Sheng
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Paper Abstract

Conclusions were obtained for polarization maintaining fiber (PMF) in which the two-frequency laser optical fiber sensor was used. In the case of longitudinal strain (epsilon) -3, the optical phase change per unit fiber elongation, $TOP(phi) /$TOPl is a constant, independent of the total length of fiber which is drawn, and the change in modal birefringence of the fiber, $TOPB, is linearly proportional to (epsilon) . By using these conclusions, very small strain and Young's modulus can be measured. The result of Young's modulus experiment shows that it is successful to measure small strain or small displacement by means of measurement of the strain of the optical fiber itself.

Paper Details

Date Published: 1 August 1991
PDF: 4 pages
Proc. SPIE 1572, International Conference on Optical Fibre Sensors in China OFS(C) '91, (1 August 1991); doi: 10.1117/12.50041
Show Author Affiliations
Yin Fang, South-west Jiaotong Univ. (China)
Kemin Sheng, South-west Jiaotong Univ. (China)


Published in SPIE Proceedings Vol. 1572:
International Conference on Optical Fibre Sensors in China OFS(C) '91

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