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Proceedings Paper

Fiber optic white light interferometric spectrum signal processing for absolute measurements
Author(s): Hai Xiao; Wei Huo; Jiangdong Deng; Ming Luo; Zhiguang Wang; Russell G. May; Anbo Wang
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Paper Abstract

We present that development of a whitelight interferometric spectrum based signal processing method for fiber optic absolute sensing. The signal processing method achieves an extremely high resolution over a large dynamic range. The signal processing techniques are demonstrated on a whitelight fiber optic sensor system which uses a broadband LED as its source, and an low finesse extrinsic Fabry-Perot cavity as its sensing element. The interferometric spectrum from the sensor is received and processed through a computer compatible spectrometer which used a grating to disperse the light and a CCD array to record the spectrum. The experimental results show that the system achieves absolute measurement with nanometer accuracy over a range of more than 16 micrometers .

Paper Details

Date Published: 8 December 1999
PDF: 7 pages
Proc. SPIE 3852, Harsh Environment Sensors II, (8 December 1999); doi: 10.1117/12.372828
Show Author Affiliations
Hai Xiao, Virginia Polytechnic Institute and State Univ. (United States)
Wei Huo, Virginia Polytechnic Institute and State Univ. (United States)
Jiangdong Deng, Virginia Polytechnic Institute and State Univ. (United States)
Ming Luo, Virginia Polytechnic Institute and State Univ. (United States)
Zhiguang Wang, Virginia Polytechnic Institute and State Univ. (United States)
Russell G. May, Virginia Polytechnic Institute and State Univ. (United States)
Anbo Wang, Virginia Polytechnic Institute and State Univ. (United States)


Published in SPIE Proceedings Vol. 3852:
Harsh Environment Sensors II
Anbo Wang, Editor(s)

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