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11 January 1999 Absolute sapphire optical fiber interferometric sensors
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Sapphire optical fiber sensor are greatly promising for high temperature sensing applications because of their high melting point, which exceeds 2000 degrees C. The extrinsic Fabry-Perot interferometric (EFPI) sapphire fiber sensors, based on absolute white light spectrum scanning signal processing, are extremely attractive in engineering applications because they do not require initialization and/or calibration when the system is turned on. Furthermore, it is not necessary to operate them in linear regions to avoid nonlinear effects, a significant problem in other EFPI sensor. In this paper, we use a single-crystal sapphire fiber for making an EFPI sensor. Interference fringes were observed by using both laser and light emitting diode sources. The effect of the lead-in fiber diameter on fringe visibility is also discussed.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hai Xiao, Y. Xie, Jiangdong Deng, Russell G. May, and Anbo Wang "Absolute sapphire optical fiber interferometric sensors", Proc. SPIE 3538, Process Monitoring with Optical Fibers and Harsh Environment Sensors, (11 January 1999);

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