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Temperature and Strain Independent Modal Interferometric Torsion Sensor Using Photonic Crystal Fiber

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3 Author(s)
Nalawade, S.M. ; Dept. of Appl. Phys., Defense Inst. of Adv. Technol., Pune, India ; Harnol, S.S. ; Thakur, H.V.

An all-fiber modal interferometric torsion sensor based on simple splicing configuration is presented wherein a photonic crystal fiber is spliced in between multimode fiber and single mode fiber. Appreciable torsion sensitivity of ~79.83 pm/° is obtained in the long dynamic range of 180°. It is also found that there is no effect of strain and temperature on torsion sensitivity in the range of 0-4500 με and 30-200°C, respectively, leading to zero cross-sensitivity of torsion with strain and temperature.

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Sensors Journal, IEEE  (Volume:12 ,  Issue: 8 )