Measurement of small strain of a solid body by two-frequency laser optical fiber sensor

Yin Fang; Kemin Sheng

doi:10.1117/12.50041

1 August 1991 Measurement of small strain of a solid body by two-frequency laser optical fiber sensor

Yin Fang, Kemin Sheng

Proceedings Volume 1572, International Conference on Optical Fibre Sensors in China OFS(C) '91; (1991) https://doi.org/10.1117/12.50041
Event: International Conference on Optical Fibre Sensors in China, 1991, Wuhan, China

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.

Citation Download Citation

Yin Fang and Kemin Sheng "Measurement of small strain of a solid body by two-frequency laser optical fiber sensor", Proc. SPIE 1572, International Conference on Optical Fibre Sensors in China OFS(C) '91, (1 August 1991); https://doi.org/10.1117/12.50041

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