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Simultaneous Measurement of Strain and Load Using a Fiber Laser Sensor

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6 Author(s)
Liang Gao ; Coll. of Eng. & Appl. Sci. & Nat. Lab. of Solid State Microstructures, Nanjing Univ., Nanjing, China ; Lin Chen ; Long Huang ; Shengchun Liu
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There are longitudinal-mode beat frequency and polarization-mode beat frequency in the beat frequency spectrum of a fiber laser. Thus, a fiber laser sensor for simultaneous measurement of strain and load by monitoring both the longitudinal-mode beat frequency and polarization-mode beat frequency is proposed and demonstrated in this paper. The maximum experimental errors of strain and load obtained are within and g over ranges of 0-960 and 0-600 g. The presented method makes full use of the sensing information of the fiber laser sensor and improves its sensing ability significantly.

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Sensors Journal, IEEE  (Volume:12 ,  Issue: 5 )