Hybrid LPFG/MEFPI sensor for simultaneous measurement of high-temperature and strain

Yun-Jiang Rao; Zeng-Ling Ran; Xian Liao; Hong-You Deng

doi:10.1117/12.785768

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16 May 2008 Hybrid LPFG/MEFPI sensor for simultaneous measurement of high-temperature and strain

Yun-Jiang Rao, Zeng-Ling Ran, Xian Liao, Hong-You Deng

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Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 70043H (2008) https://doi.org/10.1117/12.785768
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia

Abstract

A hybrid fiber-optic sensor consisting of a long-period fiber grating (LPFG) and a micro extrinsic Fabry-Perot (F-P) interferometric (MEFPI) sensor is proposed and demonstrated for simultaneous measurement of high-temperature and strain. The LPFG written by using high-frequency CO₂ laser pulses is used for high-temperature measurement while the MEFPI sensor fabricated by using 157nm F₂ laser pulses is used for strain measurement under high temperature. The distinguishing feature of such a hybrid fiber-optic sensor is that it can stand for high temperature of up to 650°C and achieve precise measurement of strain under high temperature conditions simultaneously.

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Yun-Jiang Rao, Zeng-Ling Ran, Xian Liao, and Hong-You Deng "Hybrid LPFG/MEFPI sensor for simultaneous measurement of high-temperature and strain", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70043H (16 May 2008); https://doi.org/10.1117/12.785768

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