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Photonic Crystal Fiber Strain-Independent Temperature Sensing Based on Modal Interferometer

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2 Author(s)
Nalawade, S.M. ; Dept. of Appl. Phys., Defence Inst. of Adv. Technol. (DU), Pune, India ; Thakur, H.V.

In this letter, the nonlinear photonic crystal fiber (NLPCF) has been exploited for the first time, as a high-temperature sensor based on the modal interferometric technique with a sensitivity that is remarkably higher along with low strain sensitivity. We have obtained a very high temperature sensitivity of 73 pm/°C and a very low strain sensitivity of 0.93 pm/με. The temperature to strain cross sensitivity is found to be significantly low in the very high range of temperature and strain. The proposed sensor may find application in strain-effective areas requiring accurate temperature measurement even at a high temperature range.

Published in:

Photonics Technology Letters, IEEE  (Volume:23 ,  Issue: 21 )