Fiber-Optic Extrinsic Fabry-Perot Interferometer Sensors with Multi-Wavelength Intensity Demodulation

Ning Fang Song; Rui Qi Cui; Yu Jie Yang; Xiao Liang Xu

doi:10.4028/www.scientific.net/AMM.470.630

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 470Fiber-Optic Extrinsic Fabry-Perot Interferometer...

Fiber-Optic Extrinsic Fabry-Perot Interferometer Sensors with Multi-Wavelength Intensity Demodulation

Abstract:

In this paper, a novel method used for Fabry-Perot cavity length's demodulation in high-speed and large scope measurement was proposed. Principle of the method is based on uniqueness of intensity of multiple wavelengths in the scope of Fabry-Perot vibration. This technique offers flexibility of selecting incident wave length and enhances the scope of demodulation of cavity length, compared with that popular triple wave length demodulation. In experiment, multi-wavelength demodulation is demonstrated for measurement of cavity length varying from 110um to 115um and the strain resolution was higher than 0.1um.

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Periodical:

Applied Mechanics and Materials (Volume 470)

Pages:

630-635

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.470.630

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Online since:

December 2013

Authors:

Ning Fang Song, Rui Qi Cui, Yu Jie Yang, Xiao Liang Xu

Keywords:

Fabry-Perot Cavity, High Speed Sensing, Strain Sensor

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