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Long distance fiber-optic displacement sensor based on fiber collimator.

Authors
  • Shen, Wei
  • Wu, Xiaowei
  • Meng, Hongyun
  • Zhang, Guanbin
  • Huang, Xuguang
Type
Published Article
Journal
Review of Scientific Instruments
Publisher
American Institute of Physics
Publication Date
Dec 01, 2010
Volume
81
Issue
12
Pages
123104–123104
Identifiers
DOI: 10.1063/1.3518971
PMID: 21198011
Source
Medline
License
Unknown

Abstract

A simple fiber-optic displacement sensor based on reflective intensity modulated technology is demonstrated using a fiber collimator. The sensing range is over 30 cm, which is over 100 times that of the conventional fiber-optic displacement sensor based on the normal single-mode fiber. The measured data are fitted into linear equation very well and the values of R-square are more than 0.995. The sensitivity of the device achieves 0.426 dB∕cm over the range of 5-30 cm. By applying the relative technique, the errors resulted from the fluctuation of light source and influences of environment are effectively eliminated, and the stability for wide range measurement can be improved. The simplicity of the design, high dynamic range, stability and the ease of the fabrication make it suitable for applications in industries.

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