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High-temperature fiber-tip pressure sensor

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4 Author(s)
Zhu, Y. ; Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA ; Cooper, K.L. ; Pickrell, G.R. ; Anbo Wang

This paper presents a miniature fiber-optic high-temperature pressure sensor fabricated on the tip of a singlemode (SM) fiber by means of fusion splicing, cleaving, and wet chemical etching. A new approach was developed to simplify the fabrication and greatly improve the sensitivity. The sensor is made entirely of fused silica, whose high-temperature sensing capability is explored in detail for the first time. Two sensors were tested up to 611°C and 710°C, respectively, showing excellent repeatability better than 0.62% and 1.4%. The maximum operating temperature is limited by the mechanical creep of the fused silica diaphragm.

Published in:

Lightwave Technology, Journal of  (Volume:24 ,  Issue: 2 )

Date of Publication:

Feb. 2006

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