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Single-crystal sapphire fiber-based strain sensor for high-temperature applications

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5 Author(s)
Hai Xiao ; Electr. Eng. Dept., New Mexico Inst. of Min. & Technol., Socorro, NM, USA ; Jiangdong Deng ; Pickrell, G. ; May, R.G.
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Single-crystal sapphire fibers have a very high melting point (up to 2050°C), which renders them a very good candidate for sensing applications at a very high temperature. We present in this paper the recent work of developing single-crystal sapphire fiber extrinsic Fabry-Perot interferometric strain sensors based on the white-light interferometric spectrum demodulation technique. Prototype sapphire strain sensors were fabricated and tested at high temperatures up to 1004°C. The preliminary experimental results indicate that the sensors are promising to be used under high-temperature environments for making strain measurements with strain measurement resolution of 0.2-μ strain.

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Lightwave Technology, Journal of  (Volume:21 ,  Issue: 10 )