1 May 2005 Fiber optic pressure sensor with self-compensation capability for harsh environment applications
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Optical Engineering, 44(5), 054403 (2005). doi:10.1117/1.1917570
Abstract
A novel fiber optic pressure sensor system with self-compensation capability for harsh environment applications is reported. The system compensates for the fluctuation of source power and the variation of fiber losses by self-referencing the two channel outputs of a fiber optic extrinsic Fabry-Pérot interfrometric (EFPI) sensor probe. A novel sensor fabrication system based on the controlled thermal bonding method is also described. For the first time, high-performance fiber optic EFPI sensor probes can be fabricated in a controlled fashion with excellent mechanical strength and temperature stability to survive and operate in the high-pressure and high-temperature coexisting harsh environment. Using a single-mode fiber sensor probe and the prototype signal-processing unit, we demonstrate pressure measurement up to 8400 psi and achieved resolution of 0.005% (2σ=0.4 psi) at atmospheric pressure, repeatability of ±0.15% (±13 psi), and 25-h stability of 0.09% (7 psi). The system also shows excellent remote operation capability when tested by separating the sensor probe from its signal-processing unit at a distance of 6.4 km.
Hai Xiao, Jiangdong Deng, Zhiyong Wang, Wei Huo, Po Zhang, Ming Luo, Gary R. Pickrell, Russell G. May, Anbo Wang, "Fiber optic pressure sensor with self-compensation capability for harsh environment applications," Optical Engineering 44(5), 054403 (1 May 2005). http://dx.doi.org/10.1117/1.1917570
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KEYWORDS
Sensors

Fiber optics sensors

Calibration

Environmental sensing

Fiber optics

Signal attenuation

Optical fibers

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